[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Thadeu Lima de Souza Cascardo]

** Changed in: linux (Ubuntu)
   Status: In Progress => Fix Released

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Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Fabian Grünbichler]

Continuing in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842 ?

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Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[alex]

I can confirm pre-mature OOM issues running 4.4.0-59; a downgrade back
to 4.4.0-57 completely fixes the problem.

The specific workload in this case was a build server
(http://concourse.ci) which makes heavy use of btrfs and runc
containers.

I will try to spend some time this week to make a more generic
reproduction case.

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Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Thadeu Lima de Souza Cascardo]

Hi, Mr. Grünbichler.

Do you have any specific workload where you have observed such OOMs and
that represent a regression?

Can you open a new bug for such regressions?

As far as I was able to investigate, bringing this commit would imply
bringing a whole set which introduce and change should_compact_retry. At
first, it was introduced to prevent other OOMs as well, but I would
rather see such a problem with the updated Xenial kernel before we can
bring a whole bunch of updates.

Thank you very much.
Thadeu Cascardo.

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[bugproxy]

** Tags removed: targetmilestone-inin---
** Tags added: targetmilestone-inin16041

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

** Changed in: ubuntu-z-systems
   Status: Fix Committed => Fix Released

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.4.0-59.80

---
linux (4.4.0-59.80) xenial; urgency=low

  [ John Donnelly ]

  * Release Tracking Bug
- LP: #1654282

  * [2.1.1] MAAS has nvme0n1 set as boot disk, curtin fails (LP: #1651602)
- (fix) nvme: only require 1 interrupt vector, not 2+

linux (4.4.0-58.79) xenial; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
- LP: #1651402

  * Support ACPI probe for IIO sensor drivers from ST Micro (LP: #1650123)
- SAUCE: iio: st_sensors: match sensors using ACPI handle
- SAUCE: iio: st_accel: Support sensor i2c probe using acpi
- SAUCE: iio: st_pressure: Support i2c probe using acpi
- [Config] CONFIG_HTS221=m, CONFIG_HTS221_I2C=m, CONFIG_HTS221_SPI=m

  * Fix channel data parsing in ST Micro sensor IIO drivers (LP: #1650189)
- SAUCE: iio: common: st_sensors: fix channel data parsing

  * ST Micro lng2dm 3-axis "femto" accelerometer support (LP: #1650112)
- SAUCE: iio: st-accel: add support for lis2dh12
- SAUCE: iio: st_sensors: support active-low interrupts
- SAUCE: iio: accel: Add support for the h3lis331dl accelerometer
- SAUCE: iio: st_sensors: verify interrupt event to status
- SAUCE: iio: st_sensors: support open drain mode
- SAUCE: iio:st_sensors: fix power regulator usage
- SAUCE: iio: st_sensors: switch to a threaded interrupt
- SAUCE: iio: accel: st_accel: Add lis3l02dq support
- SAUCE: iio: st_sensors: fix scale configuration for h3lis331dl
- SAUCE: iio: accel: st_accel: add support to lng2dm
- SAUCE: iio: accel: st_accel: inline per-sensor data
- SAUCE: Documentation: dt: iio: accel: add lng2dm sensor device binding

  * ST Micro hts221 relative humidity sensor support (LP: #1650116)
- SAUCE: iio: humidity: add support to hts221 rh/temp combo device
- SAUCE: Documentation: dt: iio: humidity: add hts221 sensor device binding
- SAUCE: iio: humidity: remove
- SAUCE: iio: humidity: Support acpi probe for hts211

  * crypto : tolerate new crypto hardware for z Systems (LP: #1644557)
- s390/zcrypt: Introduce CEX6 toleration

  * Acer, Inc ID 5986:055a is useless after 14.04.2 installed. (LP: #1433906)
- uvcvideo: uvc_scan_fallback() for webcams with broken chain

  * vmxnet3 driver could causes kernel panic with v4.4 if LRO enabled.
(LP: #1650635)
- vmxnet3: segCnt can be 1 for LRO packets

  * system freeze when swapping to encrypted swap partition (LP: #1647400)
- mm, oom: rework oom detection
- mm: throttle on IO only when there are too many dirty and writeback pages

  * Kernel Fixes to get TCMU File Backed Optical to work (LP: #1646204)
- target/user: Use sense_reason_t in tcmu_queue_cmd_ring
- target/user: Return an error if cmd data size is too large
- target/user: Fix comments to not refer to data ring
- SAUCE: (no-up) target/user: Fix use-after-free of tcmu_cmds if they are
  expired

  * CVE-2016-9756
- KVM: x86: drop error recovery in em_jmp_far and em_ret_far

  * Dell Precision 5520 & 3520 freezes at login screent (LP: #1650054)
- ACPI / blacklist: add _REV quirks for Dell Precision 5520 and 3520

  * CVE-2016-9794
- ALSA: pcm : Call kill_fasync() in stream lock

  * Allow fuse user namespace mounts by default in xenial (LP: #1634964)
- (namespace) mnt: Move the FS_USERNS_MOUNT check into sget_userns
- (namespace) Revert "UBUNTU: SAUCE: fs: Refuse uid/gid changes which don't
  map into s_user_ns"
- (namespace) fs: Refuse uid/gid changes which don't map into s_user_ns
- (namespace) Revert "UBUNTU: SAUCE: fs: Update posix_acl support to handle
  user namespace mounts"
- (namespace) vfs: Verify acls are valid within superblock's s_user_ns.
- SAUCE: (namespace) posix_acl: Export posix_acl_fix_xattr_userns() to 
modules
- SAUCE: (namespace) fuse: Translate ids in posix acl xattrs
- (namespace) vfs: Don't modify inodes with a uid or gid unknown to the vfs
- (namespace) vfs: Don't create inodes with a uid or gid unknown to the vfs
- (namespace) Revert "UBUNTU: SAUCE: quota: Require that qids passed to
  dqget() be valid and map into s_user_ns"
- (namespace) Revert "UBUNTU: SAUCE: quota: Convert ids relative to 
s_user_ns"
- (namespace) quota: Ensure qids map to the filesystem
- (namespace) quota: Handle quota data stored in s_user_ns in 
quota_setxquota
- (namespace) dquot: For now explicitly don't support filesystems outside of
  init_user_ns
- (namespace) Revert "UBUNTU: SAUCE: ima/evm: Allow root in s_user_ns to set
  xattrs"
- SAUCE: (namespace) security/integrity: Harden against malformed xattrs
- (namespace) Revert "UBUNTU: SAUCE: fs: Allow superblock owner to change
  ownership of inodes with unmappable ids"
- SAUCE: (namespace) fs: Allow superblock owner to change ownership of 
inodes
- (namespace) Revert "UBUNTU: SAUCE: fs: Don't remove suid for CAP_FSETID in
  

[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Fabian Grünbichler]

cherry-picking these two commits should also be accompanied by cherry-
picking https://git.kernel.org/cgit/linux/kernel/git/stable/linux-
stable.git/commit/?id=6b4e3181d7bd5ca5ab6f45929e4a5ffa7ab4ab7f ,
otherwise users will see a lot of pre-mature OOM kills..

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Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[bugproxy]

--- Comment From bress...@de.ibm.com 2016-12-22 10:04 EDT---
Thanks for all your help !

I updated the system with the kernel from -proposed.
uname -a output after the update :
Linux s38lp65 4.4.0-58-generic #79-Ubuntu SMP Tue Dec 20 12:14:19 UTC 2016 
s390x s390x s390x GNU/Linux

Then I ran my test and found, that the problem is gone.
Thank you.

** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

Hi, according to the apt-cache policy output for the kernel package 
'linux-generic':
$ apt-cache policy linux-generic
linux-generic:
  Installed: 4.4.0.57.60
  Candidate: 4.4.0.58.61
  Version table:
 4.4.0.58.61 500
500 http://us.ports.ubuntu.com/ubuntu-ports xenial-proposed/main s390x 
Packages
 *** 4.4.0.57.60 500
500 http://us.ports.ubuntu.com/ubuntu-ports xenial-updates/main s390x 
Packages
500 http://ports.ubuntu.com/ubuntu-ports xenial-security/main s390x 
Packages
100 /var/lib/dpkg/status
 4.4.0.21.22 500
500 http://us.ports.ubuntu.com/ubuntu-ports xenial/main s390x Packages

It looks like version 4.4.0.58.61 of the package 'linux-generic' is the
one from proposed.

You can install b just doing an upgrade:
$ sudo apt upgrade
or by explicitly installing that package:
$ sudo apt install linux-headers-4.4.0-58
(both with the proposed repository enabled and package index updated)
or with:
$ sudo apt-get -t $(lsb_release -cs)-proposed install linux-headers-4.4.0-58

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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

The easiest way (imho) to enable proposed is:

enable proposed:
$ sudo sh -c "echo 'deb http://us.ports.ubuntu.com/ubuntu-ports $(lsb_release 
-cs)-proposed restricted main multiverse universe' >> 
/etc/apt/sources.list.d/proposed-repositories.list" && sudo apt update
$ sudo apt update

and for completeness to disable proposed:
$ sudo rm /etc/apt/sources.list.d/proposed-repositories.list
$ sudo apt update

before installing you may check if the packages you are looking at is really 
coming from proposed:
$ apt-cache policy 

But you can also use packages from proposed w/o this, just by using:

install package from a special (-t = target) repository, like from proposed:
$ sudo apt-get -t $(lsb_release -cs)-proposed install 
or:
$ sudo apt-get install /$(lsb_release -cs)-proposed

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Luis Henriques]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag 'verification-needed-xenial' to 'verification-failed-
xenial'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-xenial

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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

** Changed in: ubuntu-z-systems
   Status: In Progress => Fix Committed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Luis Henriques]

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu Xenial)
   Status: New => Fix Committed

-- 
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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  In Progress
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

** Changed in: ubuntu-z-systems
   Status: New => In Progress

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  In Progress
Status in linux package in Ubuntu:
  In Progress

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Thadeu Lima de Souza Cascardo]

Hi, Mr. Bresser.

Thank you for your response.

Your testing of the kernel at
http://people.canonical.com/~cascardo/lp1647400/linux-
image-4.4.0-53-generic_4.4.0-53.74+lp1647400_s390x.deb would be very
much welcome.

In order to test it, you should install 16.04, then:

wget 
http://people.canonical.com/~cascardo/lp1647400/linux-image-4.4.0-53-generic_4.4.0-53.74+lp1647400_s390x.deb
dpkg -i linux-image-4.4.0-53-generic_4.4.0-53.74+lp1647400_s390x.deb

After that, reboot, verify you are running the new kernel:

uname -a | grep 1647400

Then, run your tests.

Thank you very much.

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

** Changed in: ubuntu-z-systems
   Importance: Undecided => Critical

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Thadeu Lima de Souza Cascardo]

** Changed in: linux (Ubuntu)
 Assignee: Canonical Kernel (canonical-kernel) => Thadeu Lima de Souza 
Cascardo (cascardo)

** Changed in: ubuntu-z-systems
 Assignee: Thadeu Lima de Souza Cascardo (cascardo) => (unassigned)

** Changed in: linux (Ubuntu)
   Status: New => In Progress

** Changed in: ubuntu-z-systems
   Status: In Progress => New

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[bugproxy]

** Tags added: bugnameltc-149525 severity-critical

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  In Progress
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Thadeu Lima de Souza Cascardo]

Hi, Mr. Bresser.

Can you try the kernel at
http://people.canonical.com/~cascardo/lp1647400/ besides kernel 4.8?

Thank you.
Cascardo.

** Changed in: ubuntu-z-systems
   Status: New => In Progress

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  In Progress
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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More help   : https://help.launchpad.net/ListHelp

[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Thadeu Lima de Souza Cascardo]

Hi, Mr. Bresser.

Can you try Ubuntu 16.10 and let us know if it still has the same
problem?

Thank you.
Cascardo.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

-- 
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Post to : kernel-packages@lists.launchpad.net
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More help   : https://help.launchpad.net/ListHelp

[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Thadeu Lima de Souza Cascardo]

** Changed in: ubuntu-z-systems
 Assignee: Canonical Kernel Team (canonical-kernel-team) => Thadeu Lima de 
Souza Cascardo (cascardo)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

-- 
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Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

** Changed in: ubuntu-z-systems
 Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[bugproxy]

** Tags removed: bugnameltc-149525 severity-critical

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

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More help   : https://help.launchpad.net/ListHelp

[Kernel-packages] [Bug 1647400] Re: system freeze when swapping to encrypted swap partition

[Frank Heimes]

** Also affects: ubuntu-z-systems
   Importance: Undecided
   Status: New

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser  - 2016-12-05 
04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to 
swap ends in a system freeze. No error, no dump, the system needs to be 
reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using 
the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
type:PLAIN
cipher:  aes-xts-plain64:sha256
keysize: 256 bits
device:  /dev/dasda2
offset:  0 sectors
size:8388672 sectors
mode:read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG 
Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser  - 2016-12-05 
04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
 commit 564e81a57f9788b1475127012e0fd44e9049e342
Author: Tetsuo Handa 
Date:   Fri Feb 5 15:36:30 2016 -0800
  mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make 
any progress

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1647400/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp