[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2019-01-09 Thread Joseph Salisbury 
** Changed in: linux-lts-utopic (Ubuntu)
   Status: In Progress => Fix Released

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Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  Fix Released
Status in linux-lts-utopic source package in Trusty:
  Fix Released

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-07-14 Thread Launchpad Bug Tracker 
This bug was fixed in the package linux-lts-utopic -
3.16.0-77.99~14.04.1

---
linux-lts-utopic (3.16.0-77.99~14.04.1) trusty; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
- LP: #1597047

  [ Josh Boyer ]

  * SAUCE: UEFI: acpi: Ignore acpi_rsdp kernel parameter when module
loading is restricted
- LP: #1566221
  * SAUCE: UEFI: efi: Make EFI_SECURE_BOOT_SIG_ENFORCE depend on EFI
- LP: #1566221
  * SAUCE: UEFI MODSIGN: Import certificates from UEFI Secure Boot
- LP: #1571691
  * SAUCE: UEFI: efi: Disable secure boot if shim is in insecure mode
- LP: #1571691

  [ Matthew Garrett ]

  * SAUCE: UEFI: Add secure_modules() call
- LP: #1566221
  * SAUCE: UEFI: PCI: Lock down BAR access when module security is enabled
- LP: #1566221
  * SAUCE: UEFI: x86: Lock down IO port access when module security is
enabled
- LP: #1566221
  * SAUCE: UEFI: ACPI: Limit access to custom_method
- LP: #1566221
  * SAUCE: UEFI: asus-wmi: Restrict debugfs interface when module loading
is restricted
- LP: #1566221
  * SAUCE: UEFI: Restrict /dev/mem and /dev/kmem when module loading is
restricted
- LP: #1566221
  * SAUCE: UEFI: kexec: Disable at runtime if the kernel enforces module
loading restrictions
- LP: #1566221
  * SAUCE: UEFI: x86: Restrict MSR access when module loading is restricted
- LP: #1566221
  * SAUCE: UEFI: Add option to automatically enforce module signatures when
in Secure Boot mode
- LP: #1566221

  [ Stefan Bader ]

  * [Config] Add pm80xx scsi driver to d-i
- LP: #1595628

  [ Tim Gardner ]

  * [Config] CONFIG_EFI_SECURE_BOOT_SIG_ENFORCE=y
  * SAUCE: UEFI: Display MOKSBState when disabled
- LP: #1571691
  * SAUCE: UEFI: Add secure boot and MOK SB State disabled sysctl
- LP: #1593075

  [ Upstream Kernel Changes ]

  * HID: core: prevent out-of-bound readings
- LP: #1579190
  * mm: migrate dirty page without clear_page_dirty_for_io etc
- LP: #1581865
- CVE-2016-3070
  * virtio_balloon: return the amount of freed memory from leak_balloon()
- LP: #1587087
  * virtio_balloon: free some memory from balloon on OOM
- LP: #1587087

 -- Kamal Mostafa   Tue, 28 Jun 2016 11:43:10 -0700

** Changed in: linux-lts-utopic (Ubuntu Trusty)
   Status: Fix Committed => Fix Released

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-3070

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https://bugs.launchpad.net/bugs/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  In Progress
Status in linux-lts-utopic source package in Trusty:
  Fix Released

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev

[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-06-22 Thread Kamal Mostafa 
** Changed in: linux-lts-utopic (Ubuntu Trusty)
   Status: In Progress => Fix Committed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-lts-utopic in Ubuntu.
https://bugs.launchpad.net/bugs/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  In Progress
Status in linux-lts-utopic source package in Trusty:
  Fix Committed

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-06-08 Thread Tim Gardner 
Joe - thanks for the test kernel.

Patches submitted: https://lists.ubuntu.com/archives/kernel-
team/2016-June/077944.html

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Packages, which is subscribed to linux-lts-utopic in Ubuntu.
https://bugs.launchpad.net/bugs/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  In Progress
Status in linux-lts-utopic source package in Trusty:
  In Progress

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1587087/+subscriptions

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[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-06-08 Thread AnnaMel 
Joseph, thanks kernel from
http://kernel.ubuntu.com/~jsalisbury/lp1587087/ resolved bug.

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-lts-utopic in Ubuntu.
https://bugs.launchpad.net/bugs/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  In Progress
Status in linux-lts-utopic source package in Trusty:
  In Progress

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1587087/+subscriptions

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[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-06-07 Thread Joseph Salisbury 
** Changed in: linux-lts-utopic (Ubuntu Trusty)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux-lts-utopic (Ubuntu)
   Status: Incomplete => In Progress

** Changed in: linux-lts-utopic (Ubuntu)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-lts-utopic in Ubuntu.
https://bugs.launchpad.net/bugs/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  In Progress
Status in linux-lts-utopic source package in Trusty:
  In Progress

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1587087/+subscriptions

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[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-06-04 Thread Joseph Salisbury 
I built a linux-lts-utopic test kernel, which can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1587087/

Can you test this kernel and see if it resolves this bug?

Thanks in advance!

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https://bugs.launchpad.net/bugs/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  Incomplete
Status in linux-lts-utopic source package in Trusty:
  In Progress

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1587087/+subscriptions

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[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-06-04 Thread Joseph Salisbury 
** Changed in: linux-lts-utopic (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: linux-lts-utopic (Ubuntu)
   Importance: Undecided => High

** Tags added: kernel-da-key

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https://bugs.launchpad.net/bugs/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  Incomplete
Status in linux-lts-utopic source package in Trusty:
  In Progress

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

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[Kernel-packages] [Bug 1587087] Re: OOM in guest Ubuntu with inflated balloon

2016-06-02 Thread Tim Gardner 
Joe - please build a test kernel from 'git://kernel.ubuntu.com/rtg
/ubuntu-trusty.git lts-backport-utopic-lp1587087'

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

** Package changed: linux (Ubuntu Trusty) => linux-lts-utopic (Ubuntu
Trusty)

** Changed in: linux-lts-utopic (Ubuntu Trusty)
   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/1587087

Title:
  OOM in guest Ubuntu with inflated balloon

Status in linux-lts-utopic package in Ubuntu:
  Incomplete
Status in linux-lts-utopic source package in Trusty:
  In Progress

Bug description:
  There is QEMU/KVM and a Linux OS running inside the guest.
  Inside the Linux guest a balloon consumes memory in accordance with
  commands performed on the host side in QEMU. Rapid increases of memory 
consumption
  inside the guest may end up with guest OOMs
  since memory locked by balloon couldn’t be returned to the guest OS/vm in 
time.

  The problem is addressed in mainstream Linux with the following
  patchset:

  commit 5a10b7dbf904bfe01bb9fcc6298f7df09eed77d5
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:36:29 2014 +1030
  virtio_balloon: free some memory from balloon on OOM

  Excessive virtio_balloon inflation can cause invocation of OOM-killer,
  when Linux is under severe memory pressure. Various mechanisms are
  responsible for correct virtio_balloon memory management. Nevertheless
  it is often the case that these control tools does not have enough time
  to react on fast changing memory load. As a result OS runs out of memory
  and invokes OOM-killer. The balancing of memory by use of the virtio
  balloon should not cause the termination of processes while there are
  pages in the balloon. Now there is no way for virtio balloon driver to
  free some memory at the last moment before some process will be get
  killed by OOM-killer.

  This does not provide a security breach as balloon itself is running
  inside guest OS and is working in the cooperation with the host. Thus
  some improvements from guest side should be considered as normal.

  To solve the problem, introduce a virtio_balloon callback which is
  expected to be called from the oom notifier call chain in out_of_memory()
  function. If virtio balloon could release some memory, it will make
  the system to return and retry the allocation that forced the out of
  memory killer to run.

  Allocate virtio feature bit for this: it is not set by default,
  the the guest will not deflate virtio balloon on OOM without explicit
  permission from host.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  Acked-by: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  commit 1fd9c67203af91977bf3b964ff3744cf74fc6f3f
  Author: Raushaniya Maksudova 
  Date: Mon Nov 10 09:35:29 2014 +1030

  virtio_balloon: return the amount of freed memory from
  leak_balloon()

  This value would be useful in the next patch to provide the amount of
  the freed memory for OOM killer.

  Signed-off-by: Raushaniya Maksudova 
  Signed-off-by: Denis V. Lunev 
  CC: Rusty Russell 
  CC: Michael S. Tsirkin 
  Signed-off-by: Rusty Russell 

  The problem is present in Ubuntu 14.10

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1587087/+subscriptions

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