Here is a test kernel based on kernel v3.13.0-67 (Trusty).
Installation instructions:
$ sudo add-apt-repository ppa:eric-desrochers-z/lp1512815
$ sudo apt-get update
$ sudo apt-get install
linux-image-3.13.0-67-generic=3.13.0-67.110hf85627v20151105b2
$ sudo apt-get install
This is a reproducer for the stall problem in drivers/tty/n_tty.c
To reproduce the problem, save the program below as pty.c, compile it,
and run it in parallel.
# cc -o pty pty.c
# for i in {1..16}; do ./pty& done; wait
The problem can be reproduced on a multi-socket server with recent CPUs.
The
Public bug reported:
It has been brought to my attention
By the attached test program pty, a pair of process repeats writing and
reading only '\n' to a master pseudoterminal device (/dev/ptmx) and a
slave pseudoterminal device (/dev/pts/N) each. When we carry out the
following 30 pairs 10,000
LKML reference:
https://lkml.org/lkml/2015/9/28/849
There is a fix applied upstream starting at v4.3-rc5
---
commit e81107d4c6bd098878af9796b24edc8d4a9524fd
Author: Kosuke Tatsukawa
Date: Fri Oct 2 08:27:05 2015 +
tty: fix stall caused by missing memory barrier
According to the dump a pair of process PID 7347 and 7348 were still
waiting for read() from /dev/ptmx (struct file 880c65357c00) and
/dev/pts/18 (struct file 880c65357500) respectively .
Normal behavior is as follows;
PID 7347: read(/dev/ptmx) -> write(/dev/ptmx),
PID 7348:
** Summary changed:
- 14.04: read() from pty doesn't finish.
+ read() from pty doesn't finish.
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Title:
read() from pty doesn't
I'm writing this comment on behalf of someone that does experience the
problem and have tested the test kernel (Wily kernel with commit
e81107d) by Joseph Salisbury.
Here is the feedbacks:
---
Hello,
We examined whether the provided kernel works on Ubuntu 15.10 by running
our test program.
** Tags removed: verification-needed-vivid
** Tags added: verification-done-vivid
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Title:
read() from pty doesn't finish.
Status
** Tags removed: verification-needed-wily
** Tags added: verification-done-wily
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Title:
kernel panic (General protection fault) on
** Description changed:
It has been brought to my attention :
"Contrail deployment requires Trusty kernel 3.13.X
- kernel 3.13.X has an older version of the driver, which disregards
+ kernel 3.13.X has an older version of the i40e driver, which disregards
packets with vlan ids.
Public bug reported:
It has been brought to my attention :
"Contrail deployment requires Trusty kernel 3.13.X
kernel 3.13.X has an older version of the driver, which disregards
packets with vlan ids.
This driver work as expect in Kernel 4.4.X (Xenial) but not 3.13.X
(Trusty).
This is a
I believe this upstream commit have some good chance to fix the problem.
i40e: Fix a port VLAN configuration bug
If a port VLAN is set for a given virtual function (VF) before the VF
driver is loaded then a configuration error results in which the port
VLAN is ignored when the VF driver is
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
** Summary changed:
- kernel panic (General protection fault) on module hpsa (lockup_detected)
+ General protection fault panic on module hpsa with lockup_detected attribute
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It also been brought to my attention the following about the hotfix
kernel:
--
Hi Eric,
We have applied the update from your PPA to the controller nodes and
they have been stable over the weekend. We will see if they remain
stable under load over the rest of the week.
Thanks
--
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** Changed in: linux (Ubuntu Trusty)
Assignee: Kamal Mostafa (kamalmostafa) => Eric Desrochers (slashd)
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Title:
crash start
Here's a positive feedback by someone from the community about the
trusty testfix kernel with commit 470ed447 reverted that I have provided
yesterday:
"I am able to reproduce the kernel panic consistently courtesy of the
wqthrash kernel module on this LKML post:
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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Title:
crash starting at kernel
Rectification about the hotfix instruction procedure on comment #11.
Instructions
--
# Add the PPA to your system
$ sudo add-apt-repository ppa:slashd/bug1546320-hotfix
# Resynchronize the package index files from their sources
$ sudo apt-get update
# Installing the packages desired for
It has been brought to my attention :
"We tested 3.13.0-75-generic #119-Ubuntu proposed kernel.
Our test program detects the problem 12 times in 7000 running on the
conventional kernel.
On the 2 systems with the proposed kernel the problem didn't occur in 100
running on each system.
It
Public bug reported:
Register %RAX is LIST_POISON2.
[239837.578526] general protection fault: [#1] SMP
...
[239837.664031] CPU: 4 PID: 0 Comm: swapper/4 Not tainted 3.13.0-74-generic
#118-Ubuntu
[239837.672997] Hardware name: XX
[239837.685506] task: 881028dc6000 ti:
It seems to a problem in add_timer_on moving from a timer_base to a new
timer_base
It does look like 470ed44 exposed the problem by switching to
add_timer_on from mod_timer; this is a fix to add_timer_on
Reference:
---
https://lkml.org/lkml/2016/2/3/295
https://lkml.org/lkml/2016/2/4/247
Patch:
It seems like commit: 22b886dd timers: Use proper base migration in
add_timer_on() [1]
Has been started to by apply :
$ git tag --contains 22b886dd
Ubuntu-lts-4.4.0-4.19_14.04.1
Ubuntu-lts-4.4.0-4.19_14.04.2
[1] $ git show 22b886dd
commit 22b886dd1018093920c4250dee2a9a3cb7cff7b8
Author: Tejun
See "dmesg_detach_if_pending.out" taken from the last crash into
/var/crash/
** Attachment added: "dmesg_detach_if_pending.out"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1546320/+attachment/4573109/+files/dmesg_detach_if_pending.out
** Changed in: linux (Ubuntu)
Status:
The problem has been reported by few different peoples of the community
already.
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Title:
crash starting at kernel v3.13.0-72 in
** Changed in: linux (Ubuntu Trusty)
Importance: Undecided => High
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Title:
crash starting at kernel v3.13.0-72 in timer code
I build a test kernel and made it available on a PPA[1] for verification
in order to bring confidence for the SRU process.
This test kernel revert the offending commit "470ed447: workqueue: make
sure delayed work run in local cpu".
Instructions
--
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$ sudo
** Changed in: linux-lts-utopic (Ubuntu Trusty)
Assignee: (unassigned) => Eric Desrochers (slashd)
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Title:
crash start
** Tags removed: verification-needed-vivid
** Tags added: verification-done-vivid
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Title:
crash starting at kernel
** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu Wily)
Status: Triaged => In Progress
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Hi Brad,
I do have a vmcore + dmesg, but this is very large (total: ~16GB).
I will provide the test kernel based on Ubuntu-lts-4.2.0-36.41_14.04.1
including commit "fb53c43" and ask my contact to test it and confirm if
it mitigate the issue on their affected systems where they can reproduce
the
According to the vmcore[1], the crash seems to occur while performing
the "udevadm"[2] command which is part of the sosreport under the block
plugin.
[1] - vmcore
KERNEL: /usr/lib/debug/boot/vmlinux-4.2.0-30-generic
DUMPFILE: dump.201605101421 [PARTIAL DUMP]
CPUS: 40
DATE: Wed Dec 31 19:00:00
The problem is reproducible on demand :
root@dob2-bfs-r5n09:~# udevadm --debug info -ap /sys/block/sdf
calling: info
device 0x154a300 has devpath
'/devices/pci:00/:00:02.2/:02:00.0/host2/target2:0:0/2:0:0:5/block/sdf'
Udevadm info starts with the device specified by the devpath and
According to the vmcore[1], the crash seems to occur while performing
the "udevadm"[2] command which is part of the sosreport under the block
plugin.
[1] - vmcore
KERNEL: /usr/lib/debug/boot/vmlinux-4.2.0-30-generic
DUMPFILE: dump.201605101421 [PARTIAL DUMP]
CPUS: 40
DATE: Wed Dec 31 19:00:00
Possible commit to fix the issue, found upstream:
I'll create a testfix and will make it public shortly.
$ git show fb53c43
commit fb53c439d84387621c53808a3957ffd9876e5094
Author: Tomas Henzl
Date: Fri Nov 6 16:24:09 2015 +0100
hpsa: move lockup_detected attribute to host
Public bug reported:
it has been brought to my attention the following:
Kernel version: 4.2.0-30-generic #36~14.04.1-Ubuntu
When running an sosreport on HP DL380 gen8 machines running this kernel
(Ubuntu 14.04.4 using linux-generic-lts-wily), which includes hpsa
3.4.10-0, hspa causes a kernel
Stack Trace:
[46586.194135] general protection fault: [#1] SMP
[46586.194933] Modules linked in: ipmi_ssif x86_pkg_temp_thermal
intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul
aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd serio_raw
input_leds
We can confirm this is the last line we see regardless of the disk:
ATTRS{ioerr_cnt}=="0x2"
On a working disk the next line is :
"ATTRS{lockup_detected}"
It seems to stuck at the lockup_detected attribute.
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Here's a test kernel based on "4.2.0-36.42~14.04.1" including the
upstream commit "fb53c439 - hpsa: move lockup_detected attribute to host
attr".
Please test and provide feedbacks.
Instructions:
# Pre-installation
$ sudo add-apt-repository ppa:slashd/bug1581169
$ sudo apt-get update
#
: (unassigned) => Eric Desrochers (slashd)
** Changed in: linux (Ubuntu Wily)
Assignee: (unassigned) => Eric Desrochers (slashd)
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An email has been sent to "kernel-t...@lists.ubuntu.com" for an SRU on
Wily.
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Title:
kernel panic (General protection fault) on
** Changed in: zfs-linux (Ubuntu)
Assignee: Colin Ian King (colin-king) => Eric Desrochers (slashd)
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Title:
S
I looked at the Debian pkg, and it looks like everything is okay on the
Debian side.
Package: zfsutils-linux
Source: zfs-linux
Version: 0.6.5.7-1
Architecture: amd64
Maintainer: Debian ZFS on Linux maintainers
---
$ dpkg -c
Debdiff for Yakkety (16.10)
** Patch added: "Debdiff for Yakkety (16.10)"
https://bugs.launchpad.net/ubuntu/xenial/+source/zfs-linux/+bug/1574342/+attachment/4708820/+files/lp1574342_yakkety.debdiff
** Tags added: patch sts
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Debdiff for Xenial (16.04)
** Patch added: "Debdiff for Xenial (16.04)"
https://bugs.launchpad.net/ubuntu/xenial/+source/zfs-linux/+bug/1574342/+attachment/4708833/+files/lp574342_xenial.debdiff
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I'll be working on fixing this bugs, and then star the SRU for the fix
to make its way to stable release.
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Title:
Ship
** Description changed:
+ [Impact]
+
+ zfsutils-linux missing some important tools.
+
+ Python3 compatible scripts : arc_summary.py, arcstat.py and dbufstat.py
+ found in src_code/cmd/ are not taken into account during compilation.
+
+ * arc_summary.py : Provides a summary of the
** Changed in: zfs-linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: zfs-linux (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: zfs-linux (Ubuntu Xenial)
Assignee: (unassigned) => Eric Desrochers (slashd)
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Debdiff for Xenial V2 (16.04)
** Patch removed: "Debdiff for Xenial V2 (16.04)"
https://bugs.launchpad.net/ubuntu/yakkety/+source/zfs-linux/+bug/1574342/+attachment/4708945/+files/zfs-linux-xenial-v2.debdiff
** Patch added: "Debdiff for Xenial V2 (16.04)"
@colin-king, I confirmed the correction works, zed is not complaining
anymore :
# Output of apt-get install #
Fetched 905 kB in 2s (320 kB/s)
Selecting previously unselected package zfs-doc.
(Reading database ... 60137 files and directories currently installed.)
Preparing to unpack
@colin-king,
I think I found the problem,
instead of putting usr/sbin in zfsutils-linux.install.
I'll need to specify them per script as follow:
usr/sbin/arcstat.py
usr/sbin/arc_sumamry.py
usr/sbin/dbufstat.py
I'll re-do the debdiff for both "Y" and "X".
Eric
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Debdiff for Xenial V2 (16.04)
** Patch added: "Debdiff for Xenial V2 (16.04)"
https://bugs.launchpad.net/ubuntu/yakkety/+source/zfs-linux/+bug/1574342/+attachment/4708945/+files/zfs-linux-xenial-v2.debdiff
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Debdiff for Xenial V2 (16.10)
** Patch added: "Debdiff for Xenial V2 (16.10)"
https://bugs.launchpad.net/ubuntu/yakkety/+source/zfs-linux/+bug/1574342/+attachment/4708946/+files/zfs-linux-yakkety-v2.debdiff
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@lscotte,
Keep in mind that depending on the discussion I'll have with Debian, the
scripts location and naming is susceptible to change from what you see
in "0.6.5.6-0ubuntu12".
I'll update the bug when I have more details.
Regards,
Eric
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Thanks lscotte,
That good to know, not sure if this package is an official Debian
package though, or more something ZoL have build to work Debian ?
https://github.com/zfsonlinux/zfs/wiki/Debian
"Although ZFS On Linux is now officially in the Debian GNU/Linux
repository, we will continue to
Following a discussion with a ZFS debian maintainer
He confirmed that he is going to put the python scripts into /usr/sbin
and remove the .py suffix in the Debian package.
Eric
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** Tags added: verification-done
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Title:
Ship arcstat.py and arc_summary.py with zfsutils-linux
Status in zfs-linux package in
@rlaager,
Thanks for the .debdiff, let's wait and see what will be done in Debian
by Aron, and then cherry-pick what's needed to remove the .py suffix.
Also instead of using "mv" to rename, I wonder if dh-exec can be put to
use for renaming files during the dh_install phase.
example :
Hi scotte (lscotte),
The xenial patched package can be found in the -proposed archive (AKA
Fix Commited : last step before landing into stable release -update) if
positive feedbacks from community.
Here's the instruction on how to enable -proposed archive:
@scotte (lscotte),
The .py removal will come separately, the package found in -proposed
(Xenial) and -update (Yakkety) are for the original issue only:
arcstat.py, arc_summary.py & dbufstat.py not ship in the Ubuntu
zfsutils-linux DEB package.
Another package version will include the .py suffix
@rlaager,
Neither debian src code or upstream (git) src code have manpage for
arcstat.py, arc_summary.py and dbufstat.py.
But arcstat have a manpage that can be found online :
http://linux.die.net/man/1/arcstat
@adconrad,
Yes, my plan was to place them under /usr/sbin, and not like Debian did
@rlageer,
At least the program have a "--help" argument
Example :
---
$ /usr/sbin/arcstat.py --help
---
Usage: arcstat.py [-hvx] [-f fields] [-o file] [-s string] [interval [count]]
-h : Print this help message
-v : List all possible field headers and definitions
-x :
** Description changed:
[Impact]
zfsutils-linux missing some important tools.
Python3 compatible scripts : arc_summary.py, arcstat.py and dbufstat.py
found in src_code/cmd/ are not taken into account during compilation.
* arc_summary.py : Provides a summary of the
I have reported a bug to Debian about 2 topics :
* Python script location /usr/sbin or /usr/bin, but not /bin
* Rename python scripts [arcstat, arc_summary * dbufstat] without .py extension
as per Debian Policy 10.4 [1]
[1] - https://www.debian.org/doc/debian-policy/ch-files.html#s-scripts
Debian bug :
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=832938
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Title:
Ship arcstat.py and arc_summary.py with
The patchset[1] for bug "LP #1655842" has been submitted on Jan 24th
2017 and acked by the kernel team on the same day[2].
The patch should be part of the following kernel release cycle :
cycle: 27-Jan through 18-Feb[3]
27-Jan Last day for kernel commits for this cycle
30-Jan - 04-Feb
Additional note :
Applied in master-next on Jan 26th 2017[2]
[1] - "APPLIED: [Xenial PATCH 00/11] Fixes OOM for LP #1655842"
- Eric
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** Tags added: sts
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
Status in linux package in Ubuntu:
In Progress
@Gaudenz Steinlin (gaudenz-debian),
It will takes 3 weeks to land in -updates pocket, but you can expect to
have a call for testing a proposed package by EOW.
- Eric
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I confirm that iptables offers way better performance now on Xenial
kernel.
BEFORE:
$ uname -r
4.4.0-62-generic
$ time (./list-addrs 3000 | xargs -n1 iptables -A FORWARD -j ACCEPT -s)
real0m34.502s
user0m1.372s
sys 0m27.428s
AFTER:
$ uname -r
4.4.0-63-generic
$ time
I confirm that iptables offers way better performance now in Xenial.
BEFORE:
$ uname -r
4.4.0-63-generic
$ time (./list-addrs 3000 | xargs -n1 iptables -A FORWARD -j ACCEPT -s)
real0m34.502s
user0m1.372s
sys 0m27.428s
AFTER:
$ uname -r
4.4.0-63-generic
$ time (./list-addrs 3000
** Tags removed: verification-needed-yakkety
** Tags added: verification-done-yakkety
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Title:
netfilter regression introducing a
It has been brought to my attention :
"... we did confirm that everything looks good from our end as well.
Perf results are at
https://gist.github.com/teddyking/af3c404bc313e22048c90bb381b58300 if
you'd like to review.
Thanks so much for the great support and followup!"
- Eric
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The fix is now available for testing in kernel version 4.4.0-63.84, if
you enable proposed[1]
$ apt-cache policy linux-image-4.4.0-63-generic
linux-image-4.4.0-63-generic:
Installed: (none)
==> Candidate: 4.4.0-63.84
Version table:
4.4.0-63.84 500
500
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: linux-lts-xenial (Ubuntu Trusty)
Importance: Undecided => Medium
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** Changed in: zfs-linux (Ubuntu)
Assignee: (unassigned) => Eric Desrochers (slashd)
** Changed in: zfs-linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: zfs-linux (Ubuntu)
Status: New => In Progress
** Tags added: sts
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** Changed in: zfs-linux (Ubuntu)
Importance: Medium => Low
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Title:
python utilities script suffix (.py) should be removed
I removed the Xenial debdiff attached to this bug and I will re-do it
when current zfs-linux SRU for Xenial by cking will be completed.
Until then, the Yakkety debdiff is still fine and can be sponsored.
Eric
** Patch removed: "lp1607920_xenial.debdiff"
Rebased debdiff for Xenial (16.04 LTS)
** Patch added: "xenial_debdiff"
https://bugs.launchpad.net/ubuntu/xenial/+source/zfs-linux/+bug/1607920/+attachment/4750372/+files/lp_1607920_xenial.debdiff
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@scotte,
After some verification, I found out that cking uploaded a patch on Sept
26 on Xenial for another zfs-linux bug[1] using version
"0.6.5.6-0ubuntu13", which interfere with my debdiff.
"pull-lp-source" and "rmadison" didn't shown the existence of
"0.6.5.6-0ubuntu13".
I found it by
Note that this is based on a comment previously made by Adam that can be
found here :
https://bugs.launchpad.net/ubuntu/+source/zfs-
linux/+bug/1574342/comments/19
Eric
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Thanks Richard,
I'll do the SRU on your behalf.
Eric
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Title:
python utilities script suffix (.py) should be removed as per
Richard the patch is working as expected
Confirmation :
$ dpkg -L zfsutils-linux | egrep -i "arc|dbuf"
/usr/sbin/arc_summary
/usr/sbin/arcstat
/usr/sbin/dbufstat
I'll go ahead and start the SRU for Yakkety (16.10).
Since this is not a "bug", I will only submit it for the devel release.
Aron
debdiff for Yakkety (16.10)
** Patch added: "LP1628279_for_yakkety.debdiff"
https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1628279/+attachment/4751734/+files/lp1628279_yakkety.debdiff
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** Description changed:
+ [Impact]
+
The zfs utilities scripts shipped with debian and ubuntu such as :
* arc_summary.py : Provides a summary of the statistics
- https://github.com/zfsonlinux/zfs/blob/master/cmd/arc_summary
+ * arcstat.py : Print out ZFS ARC Statistics exported
@apw
With regard to the translation
The commit has been intensively tested in different scenarios/env/...
and of course with the "ZFS Test Suite"[1] which include functionality,
perf, and stress tests.
All the tests were reported as successful.
I hope this answer your questions and
@apw
To answer your question:
"Also as you are changing MNTTAB is there any reason not to be using that here?"
The "reading" is redirected to /proc/self/mounts and the "writing" to
/etc/mtab, but if it doesn't exist, that's fine. ZFS just won't update
/etc/mtab.
Ideally, ZFS should be
I confirmed it works as expected :
root@test01:~# dpkg -l | grep -i zfsutils-linux
ii zfsutils-linux 0.6.5.6-0ubuntu14 amd64
Native OpenZFS management utilities for Linux
root@test01:~# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
@rlaager, as you know, the upstream source code has the suffix (.py)
In order to do less manipulation since this is not fixing anything
broken, I symlinked that way using dh_links.
IMHO, the symlink order doesn't really matter since the result will be
the same either way, to have both old name
Thanks scotte for the feedbacks.
** Tags added: verification-done
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https://bugs.launchpad.net/bugs/1607920
Title:
zfs services fail on firstboot if zfs-utils is
** Description changed:
[Impact]
The zfs utilities scripts shipped with debian and ubuntu such as :
* arc_summary.py : Provides a summary of the statistics
* arcstat.py : Print out ZFS ARC Statistics exported via kstat(1)
* dbufstat.py : Print out statistics for all
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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https://bugs.launchpad.net/bugs/1572630
Title:
boot-time kernel panic introduced in
I jointly worked with the zfsonlinux maintainer on a patch that will be merged
in 0.7.0 milestone
https://github.com/zfsonlinux/zfs/milestone/11?closed=1
#4680, has been tackled in two parts. the first part (patch that will be
merge in 0.7.0), change from /etc/mtab to /proc/self/mounts, and keep
rlaager, yes, this is reasonable.
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https://bugs.launchpad.net/bugs/1628279
Title:
python utilities script suffix (.py) should be removed as per Policy
10.4
Status
I pulled the source code per version and rebase my debdiff on top of
"0.6.5.6-0ubuntu13".
Will attach the new debdiff in a couple of minutes.
Eric
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** Changed in: zfs-linux (Ubuntu)
Importance: Low => Medium
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https://bugs.launchpad.net/bugs/1628279
Title:
python utilities script suffix (.py) should be removed
Potential]
- *
+ * none expected, patch has been merged upstream and ubuntu package has
+ been tested by people from the community.
+
+ [Other Info]
+
+ * Author: Eric Desrochers <eric.desroch...@canonical.com>
- [Other Info]
-
- * This can likely be resolved in the system
** Changed in: zfs-linux (Ubuntu)
Assignee: (unassigned) => Eric Desrochers (slashd)
** Changed in: zfs-linux (Ubuntu)
Status: New => Confirmed
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(see comment #7).
[Other Info]
- * Author: Eric Desrochers <eric.desroch...@canonical.com>
-
- * Origin:
https://github.com/zfsonlinux/zfs/commit/792517389fad5c495a2738b61c2e9c65dedaaa9a
+ * Author: Eric Desrochers <eric.desroch...@canonical.com>
- * Bug: https:
the problem (see comment #7).
+ * This is a upstream commit merge in 0.7.0.
+
+ * A ubuntu package has been tested (including the upstream commit) by a
+ user of the community facing this bug, and confirmed it addresses the
+ problem (see comment #7).
[Other Info]
-
- * Author: Eric Desrochers
debdiff for devel release : Yakkety (16.10)
** Changed in: zfs-linux (Ubuntu Xenial)
Assignee: (unassigned) => Eric Desrochers (slashd)
** Changed in: zfs-linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: zfs-linux (Ubuntu Xenial)
Importance: Undecided =&g
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