[Kernel-packages] [Bug 1637619] Re: ext4dist strange timings on ubuntu 16.04

[scotte]

The fix for this has really been released this time. Confirmed fixed in
4.4.0-51.72.

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Title:
  ext4dist strange timings on ubuntu 16.04

Status in Linux:
  New
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  Reference: https://github.com/iovisor/bcc/issues/790

  "The bug is: timekeeping: Avoid taking lock in NMI path with
  CONFIG_DEBUG_TIMEKEEPING

  The fix is: timekeeping: Fix __ktime_get_fast_ns() regression

  Looks like that kernel version has the bug but not the fix.
  
http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_4.4.0-45.66/changelog;

  Apparently this is fixed by commit:

  commit 58bfea9532552d422bde7afa207e1a0f08dffa7d
  Author: John Stultz john.stu...@linaro.org
  Date: Tue Oct 4 19:55:48 2016 -0700
  timekeeping: Fix __ktime_get_fast_ns() regression

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[Kernel-packages] [Bug 1637619] Re: ext4dist strange timings on ubuntu 16.04

[scotte]

Actually, I believe it has not been released yet. The fix is in the
changelog for 4.4.0-48.69, but the latest release of the xenial LTS
kernel is 4.4.0-47.68 where the bug can still be reproduced.

Specifically:
  * Xenial update to v4.4.25 stable release (LP: #1634153)
- timekeeping: Fix __ktime_get_fast_ns() regression

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Title:
  ext4dist strange timings on ubuntu 16.04

Status in Linux:
  New
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  Reference: https://github.com/iovisor/bcc/issues/790

  "The bug is: timekeeping: Avoid taking lock in NMI path with
  CONFIG_DEBUG_TIMEKEEPING

  The fix is: timekeeping: Fix __ktime_get_fast_ns() regression

  Looks like that kernel version has the bug but not the fix.
  
http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_4.4.0-45.66/changelog;

  Apparently this is fixed by commit:

  commit 58bfea9532552d422bde7afa207e1a0f08dffa7d
  Author: John Stultz john.stu...@linaro.org
  Date: Tue Oct 4 19:55:48 2016 -0700
  timekeeping: Fix __ktime_get_fast_ns() regression

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[Kernel-packages] [Bug 1637619] Re: ext4dist strange timings on ubuntu 16.04

[scotte]

Awesome, thanks Colin!

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Title:
  ext4dist strange timings on ubuntu 16.04

Status in Linux:
  New
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  Reference: https://github.com/iovisor/bcc/issues/790

  "The bug is: timekeeping: Avoid taking lock in NMI path with
  CONFIG_DEBUG_TIMEKEEPING

  The fix is: timekeeping: Fix __ktime_get_fast_ns() regression

  Looks like that kernel version has the bug but not the fix.
  
http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_4.4.0-45.66/changelog;

  Apparently this is fixed by commit:

  commit 58bfea9532552d422bde7afa207e1a0f08dffa7d
  Author: John Stultz john.stu...@linaro.org
  Date: Tue Oct 4 19:55:48 2016 -0700
  timekeeping: Fix __ktime_get_fast_ns() regression

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[Kernel-packages] [Bug 1637619] Re: ext4dist strange timings on ubuntu 16.04

[scotte]

It's been a few weeks - is there any update when this fix will be
published? Thanks!

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Title:
  ext4dist strange timings on ubuntu 16.04

Status in Linux:
  New
Status in linux package in Ubuntu:
  Fix Committed

Bug description:
  Reference: https://github.com/iovisor/bcc/issues/790

  "The bug is: timekeeping: Avoid taking lock in NMI path with
  CONFIG_DEBUG_TIMEKEEPING

  The fix is: timekeeping: Fix __ktime_get_fast_ns() regression

  Looks like that kernel version has the bug but not the fix.
  
http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_4.4.0-45.66/changelog;

  Apparently this is fixed by commit:

  commit 58bfea9532552d422bde7afa207e1a0f08dffa7d
  Author: John Stultz john.stu...@linaro.org
  Date: Tue Oct 4 19:55:48 2016 -0700
  timekeeping: Fix __ktime_get_fast_ns() regression

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[Kernel-packages] [Bug 1607920] Re: zfs services fail on firstboot if zfs-utils is integrated into the deployment image

[scotte]

Thanks Eric, we will remove our local workaround.

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Title:
  zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image

Status in sysvinit package in Ubuntu:
  Won't Fix
Status in zfs-linux package in Ubuntu:
  Fix Released
Status in sysvinit source package in Xenial:
  Won't Fix
Status in zfs-linux source package in Xenial:
  Fix Released

Bug description:
  [Impact]

   * zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image.

   * Output from systemd -
  sudo systemctl --failed
  UNIT LOAD ACTIVE SUB DESCRIPTION
  ● zfs-import-scan.service loaded failed failed Import ZFS pools by device 
scanning
  ● zfs-mount.service loaded failed failed Mount ZFS filesystems

   * This is particularly frustrating for users who use automated
  monitoring as it means virtual machines must always be restarted
  before showing as clean.

   * This failure is due to zfs services starting up before /etc/mtab
  has a chance to be symlinked to /proc/mounts.

  [Test Case]

   1. Grab a stock xenial image, and unpack it and add zfs-utils to it.  Repack 
it.
   2. Boot machine
   3. Check systemctl --failed.

  [Regression Potential]

   * none expected, patch has been intensively tested by the upsteam zfs
  test script suite.

   * 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]

  * The "reading" is redirected to /proc/self/mounts. 
  The writing to /etc/mtab. Some distros still need that. The current hope is 
to replace the writing (and maybe reading) with libmount, in a second phase.

  
   * Upstream commit : 
https://github.com/zfsonlinux/zfs/commit/792517389fad5c495a2738b61c2e9c65dedaaa9a

   * Upstream bug: https://github.com/zfsonlinux/zfs/issues/4680

   * Debian bug : https://bugs.debian.org/cgi-
  bin/bugreport.cgi?bug=839071

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[Kernel-packages] [Bug 1607920] Re: zfs services fail on firstboot if zfs-utils is integrated into the deployment image

[scotte]

I tested again with xenial-proposed and confirmed that everything looks
good as far as systemd no longer failing ZFS units due to no /etc/mtab.

ii  libzfs2linux 0.6.5.6-0ubuntu14   amd64  
  Native OpenZFS filesystem library for Linux
ii  zfs-dkms 0.6.5.6-0ubuntu14   amd64  
  Native OpenZFS filesystem kernel modules for Linux
ii  zfs-doc  0.6.5.6-0ubuntu14   all
  Native OpenZFS filesystem documentation and examples.
ii  zfs-initramfs0.6.5.6-0ubuntu14   all
  Native OpenZFS root filesystem capabilities for Linux
ii  zfs-zed  0.6.5.6-0ubuntu14   amd64  
  OpenZFS Event Daemon (zed)
ii  zfsutils-linux   0.6.5.6-0ubuntu14   amd64  
  Native OpenZFS management utilities for Linux

# systemctl --failed
0 loaded units listed. [...]

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Title:
  zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image

Status in sysvinit package in Ubuntu:
  Won't Fix
Status in zfs-linux package in Ubuntu:
  Fix Released
Status in sysvinit source package in Xenial:
  Won't Fix
Status in zfs-linux source package in Xenial:
  Fix Committed

Bug description:
  [Impact]

   * zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image.

   * Output from systemd -
  sudo systemctl --failed
  UNIT LOAD ACTIVE SUB DESCRIPTION
  ● zfs-import-scan.service loaded failed failed Import ZFS pools by device 
scanning
  ● zfs-mount.service loaded failed failed Mount ZFS filesystems

   * This is particularly frustrating for users who use automated
  monitoring as it means virtual machines must always be restarted
  before showing as clean.

   * This failure is due to zfs services starting up before /etc/mtab
  has a chance to be symlinked to /proc/mounts.

  [Test Case]

   1. Grab a stock xenial image, and unpack it and add zfs-utils to it.  Repack 
it.
   2. Boot machine
   3. Check systemctl --failed.

  [Regression Potential]

   * none expected, patch has been intensively tested by the upsteam zfs
  test script suite.

   * 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]

  * The "reading" is redirected to /proc/self/mounts. 
  The writing to /etc/mtab. Some distros still need that. The current hope is 
to replace the writing (and maybe reading) with libmount, in a second phase.

  
   * Upstream commit : 
https://github.com/zfsonlinux/zfs/commit/792517389fad5c495a2738b61c2e9c65dedaaa9a

   * Upstream bug: https://github.com/zfsonlinux/zfs/issues/4680

   * Debian bug : https://bugs.debian.org/cgi-
  bin/bugreport.cgi?bug=839071

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[Kernel-packages] [Bug 1607920] Re: zfs services fail on firstboot if zfs-utils is integrated into the deployment image

[scotte]

I tested this using my reproduction method in AWS EC2 with a test
package/PPA provided by Eric@Ubuntu (slashd) containing the commit
referenced in comment #6.

All looks good now - systemd units for ZFS no longer fail. Thanks for
moving this along!

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Title:
  zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image

Status in sysvinit package in Ubuntu:
  Won't Fix
Status in zfs-linux package in Ubuntu:
  In Progress

Bug description:
  [Impact]

   * zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image.

   * Output from systemd - 
  sudo systemctl --failed 
  UNIT LOAD ACTIVE SUB DESCRIPTION 
  ● zfs-import-scan.service loaded failed failed Import ZFS pools by device 
scanning 
  ● zfs-mount.service loaded failed failed Mount ZFS filesystems 

   * This is particularly frustrating for users who use automated
  monitoring as it means virtual machines must always be restarted
  before showing as clean.

   * This failure is due to zfs services starting up before /etc/mtab
  has a chance to be symlinked to /proc/mounts.

  [Test Case]

   1. Grab a stock xenial image, and unpack it and add zfs-utils to it.  Repack 
it. 
   2. Boot machine
   3. Check systemctl --failed.

  [Regression Potential]

   *
   
  [Other Info]
   
   * This can likely be resolved in the systemd init scripts, by modifying 
zfs-linux to depend on /proc/mounts instead, or inclusion of 
/lib/init/mount-functions.sh in initscripts (sysvinit).

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[Kernel-packages] [Bug 1574342] Re: Ship arcstat.py and arc_summary.py with zfsutils-linux

[scotte]

@slashd Sorry for not being more clear - I already tested from proposed
(see comment #22). As far as I can tell, it hasn't changed since then
but it is unclear to me if the renaming from .py from upstream will
happen separately or as part of this issue. I'm fine with it either way,
it just helps in knowing the plan. Thanks.

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Title:
  Ship arcstat.py and arc_summary.py with zfsutils-linux

Status in zfs-linux package in Ubuntu:
  Fix Released
Status in zfs-linux source package in Xenial:
  Fix Committed
Status in zfs-linux source package in Yakkety:
  Fix Released

Bug description:
  [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 statistics
  https://github.com/zfsonlinux/zfs/blob/master/cmd/arc_summary

  * arcstat.py : Print out ZFS ARC Statistics exported via kstat(1)
  https://github.com/zfsonlinux/zfs/tree/master/cmd/arcstat

  * dbufstat.py: Print out statistics for all cached dmu buffers
  https://github.com/zfsonlinux/zfs/blob/master/cmd/dbufstat

  [Test Case]

  # rmadison zfsutils-linux
  ...
   zfsutils-linux | 0.6.5.6-0ubuntu10  | xenial-updates
  ...

  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.6-0ubuntu10_amd64.deb | egrep 
"arcstat|arc_summary|dbufstat"

  # You will notice there are not present.

  [Regression Potential]

  None expected, debian package[1] has already made the change to build
  the python scripts.

  [1]
  Package: zfsutils-linux
  Source: zfs-linux
  Version: 0.6.5.7-1
  Architecture: amd64
  Maintainer: Debian ZFS on Linux maintainers 


  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.7-1_amd64.deb | egrep -i "arc|dbufstat"
  -rwxr-xr-x root/root 40751 2016-05-31 03:40 ./bin/arc_summary.py
  -rwxr-xr-x root/root 13057 2016-05-31 03:40 ./bin/arcstat.py
  -rwxr-xr-x root/root 18718 2016-05-31 03:40 ./bin/dbufstat.py

  [Other Info]

  * This is based on the following Debian commits :

  Debian git commits
  ===
  commit 730989397063955d60a1845003cfb7433eba1e52
  Author: Aron Xu 
  Date: Tue Apr 26 17:01:29 2016 +0800

  Add dh-python to b-d

  --

  commit 814413118fb88de3ce596a87a8a011f50c225fdd
  Author: Aron Xu 
  Date: Sun Nov 22 15:44:16 2015 +0800

  Add python related dependencies
  ===

  * Despite what Debian did by adding theses script under /bin.
    I'll add them under /usr/sbin, which is more appropriate.

  * Unfortunately manpage for theses 3 program seems limited.
    There is none in Debian nor git upstream repo.

  The only manpage I found is for arcstat online :

  http://linux.die.net/man/1/arcstat

  [Original Description]

  arcstat.py and arc_summary.py are valuable tools to determine ZFS' ARC
  usage, it is not obvious why they are not included in zfsutils-linux.
  As ubuntu-minimal already depends on python3 it should be safe to
  assume python is available, or am I mistaken here?

  arcstat.py gives an iostat-like overview about ARC reads, hit rate, current 
and target size in regular intervals:
  # ./arcstat.py 1
  time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz c
  19:22:33 0 0  0 00 00 00   2.0G  7.8G
  19:22:34 3 0  0 00 00 00   2.0G  7.8G
  19:22:3521 0  0 00 00 00   2.0G  7.8G
  ^C

  arc_summary.py shows a more detailed overview of the current ARC status and 
ZFS tunables:
  # ./arc_summary.py

  
  ZFS Subsystem Report  Sun Apr 24 19:23:25 2016
  ARC Summary: (HEALTHY)
   Memory Throttle Count:   0

  ARC Misc:
   Deleted: 46
   Mutex Misses:0
   Evict Skips: 0

  ARC Size: 25.10%  1.95GiB
   Target Size: (Adaptive)  100.00% 7.78GiB
   Min Size (Hard Limit):   0.40%   32.00   MiB
   Max Size (High Water):   248:1   7.78GiB

  ARC Size Breakdown:
   Recently Used Cache Size:50.00%  3.89GiB
   Frequently Used Cache Size:  50.00%  3.89GiB

  ARC Hash Breakdown:
   Elements Max:32.31k
   Elements Current:99.78%  32.24k
   Collisions:  40.54k
   Chain Max:   3
   Chains:  240

  ARC Total accesses:   4.54m
   Cache Hit Ratio: 99.39%  4.51m
   Cache 

[Kernel-packages] [Bug 1574342] Re: Ship arcstat.py and arc_summary.py with zfsutils-linux

[scotte]

OOps, per my last comment regarding tracking issue upstream - that's the
Debian bug you previously mentioned, https://bugs.debian.org/cgi-
bin/bugreport.cgi?bug=832938, not further upstream from ZoL. Sorry for
my misunderstanding. :-/

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Title:
  Ship arcstat.py and arc_summary.py with zfsutils-linux

Status in zfs-linux package in Ubuntu:
  Fix Released
Status in zfs-linux source package in Xenial:
  Fix Committed
Status in zfs-linux source package in Yakkety:
  Fix Released

Bug description:
  [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 statistics
  https://github.com/zfsonlinux/zfs/blob/master/cmd/arc_summary

  * arcstat.py : Print out ZFS ARC Statistics exported via kstat(1)
  https://github.com/zfsonlinux/zfs/tree/master/cmd/arcstat

  * dbufstat.py: Print out statistics for all cached dmu buffers
  https://github.com/zfsonlinux/zfs/blob/master/cmd/dbufstat

  [Test Case]

  # rmadison zfsutils-linux
  ...
   zfsutils-linux | 0.6.5.6-0ubuntu10  | xenial-updates
  ...

  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.6-0ubuntu10_amd64.deb | egrep 
"arcstat|arc_summary|dbufstat"

  # You will notice there are not present.

  [Regression Potential]

  None expected, debian package[1] has already made the change to build
  the python scripts.

  [1]
  Package: zfsutils-linux
  Source: zfs-linux
  Version: 0.6.5.7-1
  Architecture: amd64
  Maintainer: Debian ZFS on Linux maintainers 


  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.7-1_amd64.deb | egrep -i "arc|dbufstat"
  -rwxr-xr-x root/root 40751 2016-05-31 03:40 ./bin/arc_summary.py
  -rwxr-xr-x root/root 13057 2016-05-31 03:40 ./bin/arcstat.py
  -rwxr-xr-x root/root 18718 2016-05-31 03:40 ./bin/dbufstat.py

  [Other Info]

  * This is based on the following Debian commits :

  Debian git commits
  ===
  commit 730989397063955d60a1845003cfb7433eba1e52
  Author: Aron Xu 
  Date: Tue Apr 26 17:01:29 2016 +0800

  Add dh-python to b-d

  --

  commit 814413118fb88de3ce596a87a8a011f50c225fdd
  Author: Aron Xu 
  Date: Sun Nov 22 15:44:16 2015 +0800

  Add python related dependencies
  ===

  * Despite what Debian did by adding theses script under /bin.
    I'll add them under /usr/sbin, which is more appropriate.

  * Unfortunately manpage for theses 3 program seems limited.
    There is none in Debian nor git upstream repo.

  The only manpage I found is for arcstat online :

  http://linux.die.net/man/1/arcstat

  [Original Description]

  arcstat.py and arc_summary.py are valuable tools to determine ZFS' ARC
  usage, it is not obvious why they are not included in zfsutils-linux.
  As ubuntu-minimal already depends on python3 it should be safe to
  assume python is available, or am I mistaken here?

  arcstat.py gives an iostat-like overview about ARC reads, hit rate, current 
and target size in regular intervals:
  # ./arcstat.py 1
  time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz c
  19:22:33 0 0  0 00 00 00   2.0G  7.8G
  19:22:34 3 0  0 00 00 00   2.0G  7.8G
  19:22:3521 0  0 00 00 00   2.0G  7.8G
  ^C

  arc_summary.py shows a more detailed overview of the current ARC status and 
ZFS tunables:
  # ./arc_summary.py

  
  ZFS Subsystem Report  Sun Apr 24 19:23:25 2016
  ARC Summary: (HEALTHY)
   Memory Throttle Count:   0

  ARC Misc:
   Deleted: 46
   Mutex Misses:0
   Evict Skips: 0

  ARC Size: 25.10%  1.95GiB
   Target Size: (Adaptive)  100.00% 7.78GiB
   Min Size (Hard Limit):   0.40%   32.00   MiB
   Max Size (High Water):   248:1   7.78GiB

  ARC Size Breakdown:
   Recently Used Cache Size:50.00%  3.89GiB
   Frequently Used Cache Size:  50.00%  3.89GiB

  ARC Hash Breakdown:
   Elements Max:32.31k
   Elements Current:99.78%  32.24k
   Collisions:  40.54k
   Chain Max:   3
   Chains:  240

  ARC Total accesses:   4.54m
   Cache Hit Ratio: 99.39%  4.51m
   Cache Miss Ratio:0.61%   27.74k
   Actual Hit Ratio:98.76%  4.48m

   Data 

[Kernel-packages] [Bug 1574342] Re: Ship arcstat.py and arc_summary.py with zfsutils-linux

[scotte]

That's great news that upstream ZFS will get that fixed up - I didn't
see a an issue for it at the ZoL github, are there plans to do so. Would
be nice from a tracking perspective so this issue is tied in.

Also, I see the Ubuntu update was published for Yakkety, but I'm not
sure where Zenial is - will the same Ubuntu fix go for Xenial, or is it
waiting for validation, fix from upstream, or ? Thanks and let me know
anything I can do to help.

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Title:
  Ship arcstat.py and arc_summary.py with zfsutils-linux

Status in zfs-linux package in Ubuntu:
  Fix Released
Status in zfs-linux source package in Xenial:
  Fix Committed
Status in zfs-linux source package in Yakkety:
  Fix Released

Bug description:
  [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 statistics
  https://github.com/zfsonlinux/zfs/blob/master/cmd/arc_summary

  * arcstat.py : Print out ZFS ARC Statistics exported via kstat(1)
  https://github.com/zfsonlinux/zfs/tree/master/cmd/arcstat

  * dbufstat.py: Print out statistics for all cached dmu buffers
  https://github.com/zfsonlinux/zfs/blob/master/cmd/dbufstat

  [Test Case]

  # rmadison zfsutils-linux
  ...
   zfsutils-linux | 0.6.5.6-0ubuntu10  | xenial-updates
  ...

  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.6-0ubuntu10_amd64.deb | egrep 
"arcstat|arc_summary|dbufstat"

  # You will notice there are not present.

  [Regression Potential]

  None expected, debian package[1] has already made the change to build
  the python scripts.

  [1]
  Package: zfsutils-linux
  Source: zfs-linux
  Version: 0.6.5.7-1
  Architecture: amd64
  Maintainer: Debian ZFS on Linux maintainers 


  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.7-1_amd64.deb | egrep -i "arc|dbufstat"
  -rwxr-xr-x root/root 40751 2016-05-31 03:40 ./bin/arc_summary.py
  -rwxr-xr-x root/root 13057 2016-05-31 03:40 ./bin/arcstat.py
  -rwxr-xr-x root/root 18718 2016-05-31 03:40 ./bin/dbufstat.py

  [Other Info]

  * This is based on the following Debian commits :

  Debian git commits
  ===
  commit 730989397063955d60a1845003cfb7433eba1e52
  Author: Aron Xu 
  Date: Tue Apr 26 17:01:29 2016 +0800

  Add dh-python to b-d

  --

  commit 814413118fb88de3ce596a87a8a011f50c225fdd
  Author: Aron Xu 
  Date: Sun Nov 22 15:44:16 2015 +0800

  Add python related dependencies
  ===

  * Despite what Debian did by adding theses script under /bin.
    I'll add them under /usr/sbin, which is more appropriate.

  * Unfortunately manpage for theses 3 program seems limited.
    There is none in Debian nor git upstream repo.

  The only manpage I found is for arcstat online :

  http://linux.die.net/man/1/arcstat

  [Original Description]

  arcstat.py and arc_summary.py are valuable tools to determine ZFS' ARC
  usage, it is not obvious why they are not included in zfsutils-linux.
  As ubuntu-minimal already depends on python3 it should be safe to
  assume python is available, or am I mistaken here?

  arcstat.py gives an iostat-like overview about ARC reads, hit rate, current 
and target size in regular intervals:
  # ./arcstat.py 1
  time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz c
  19:22:33 0 0  0 00 00 00   2.0G  7.8G
  19:22:34 3 0  0 00 00 00   2.0G  7.8G
  19:22:3521 0  0 00 00 00   2.0G  7.8G
  ^C

  arc_summary.py shows a more detailed overview of the current ARC status and 
ZFS tunables:
  # ./arc_summary.py

  
  ZFS Subsystem Report  Sun Apr 24 19:23:25 2016
  ARC Summary: (HEALTHY)
   Memory Throttle Count:   0

  ARC Misc:
   Deleted: 46
   Mutex Misses:0
   Evict Skips: 0

  ARC Size: 25.10%  1.95GiB
   Target Size: (Adaptive)  100.00% 7.78GiB
   Min Size (Hard Limit):   0.40%   32.00   MiB
   Max Size (High Water):   248:1   7.78GiB

  ARC Size Breakdown:
   Recently Used Cache Size:50.00%  3.89GiB
   Frequently Used Cache Size:  50.00%  3.89GiB

  ARC Hash Breakdown:
   Elements Max:32.31k
   Elements Current:99.78%  32.24k
   Collisions:  40.54k
   Chain Max:   3
   Chains:  240

  

[Kernel-packages] [Bug 1574342] Re: Ship arcstat.py and arc_summary.py with zfsutils-linux

[scotte]

To add to the confusion - arcstat.py and friends are already in
/usr/sbin in the Debian packages I have on Debian Jessie...

$ dpkg -S /usr/sbin/arcstat.py
zfsutils: /usr/sbin/arcstat.py

$ apt show zfsutils
Package: zfsutils
Source: zfs-linux
Version: 0.6.5.7-8-jessie
Maintainer: Debian ZFS on Linux maintainers 

[...]
APT-Sources: http://archive.zfsonlinux.org/debian/ jessie/main amd64 Packages
[...]

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https://bugs.launchpad.net/bugs/1574342

Title:
  Ship arcstat.py and arc_summary.py with zfsutils-linux

Status in zfs-linux package in Ubuntu:
  In Progress
Status in zfs-linux source package in Xenial:
  Fix Committed
Status in zfs-linux source package in Yakkety:
  In Progress

Bug description:
  [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 statistics
  https://github.com/zfsonlinux/zfs/blob/master/cmd/arc_summary

  * arcstat.py : Print out ZFS ARC Statistics exported via kstat(1)
  https://github.com/zfsonlinux/zfs/tree/master/cmd/arcstat

  * dbufstat.py: Print out statistics for all cached dmu buffers
  https://github.com/zfsonlinux/zfs/blob/master/cmd/dbufstat

  [Test Case]

  # rmadison zfsutils-linux
  ...
   zfsutils-linux | 0.6.5.6-0ubuntu10  | xenial-updates
  ...

  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.6-0ubuntu10_amd64.deb | egrep 
"arcstat|arc_summary|dbufstat"

  # You will notice there are not present.

  [Regression Potential]

  None expected, debian package[1] has already made the change to build
  the python scripts.

  [1]
  Package: zfsutils-linux
  Source: zfs-linux
  Version: 0.6.5.7-1
  Architecture: amd64
  Maintainer: Debian ZFS on Linux maintainers 


  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.7-1_amd64.deb | egrep -i "arc|dbufstat"
  -rwxr-xr-x root/root 40751 2016-05-31 03:40 ./bin/arc_summary.py
  -rwxr-xr-x root/root 13057 2016-05-31 03:40 ./bin/arcstat.py
  -rwxr-xr-x root/root 18718 2016-05-31 03:40 ./bin/dbufstat.py

  [Other Info]

  * This is based on the following Debian commits :

  Debian git commits
  ===
  commit 730989397063955d60a1845003cfb7433eba1e52
  Author: Aron Xu 
  Date: Tue Apr 26 17:01:29 2016 +0800

  Add dh-python to b-d

  --

  commit 814413118fb88de3ce596a87a8a011f50c225fdd
  Author: Aron Xu 
  Date: Sun Nov 22 15:44:16 2015 +0800

  Add python related dependencies
  ===

  * Despite what Debian did by adding theses script under /bin.
    I'll add them under /usr/sbin, which is more appropriate.

  * Unfortunately manpage for theses 3 program seems limited.
    There is none in Debian nor git upstream repo.

  The only manpage I found is for arcstat online :

  http://linux.die.net/man/1/arcstat

  [Original Description]

  arcstat.py and arc_summary.py are valuable tools to determine ZFS' ARC
  usage, it is not obvious why they are not included in zfsutils-linux.
  As ubuntu-minimal already depends on python3 it should be safe to
  assume python is available, or am I mistaken here?

  arcstat.py gives an iostat-like overview about ARC reads, hit rate, current 
and target size in regular intervals:
  # ./arcstat.py 1
  time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz c
  19:22:33 0 0  0 00 00 00   2.0G  7.8G
  19:22:34 3 0  0 00 00 00   2.0G  7.8G
  19:22:3521 0  0 00 00 00   2.0G  7.8G
  ^C

  arc_summary.py shows a more detailed overview of the current ARC status and 
ZFS tunables:
  # ./arc_summary.py

  
  ZFS Subsystem Report  Sun Apr 24 19:23:25 2016
  ARC Summary: (HEALTHY)
   Memory Throttle Count:   0

  ARC Misc:
   Deleted: 46
   Mutex Misses:0
   Evict Skips: 0

  ARC Size: 25.10%  1.95GiB
   Target Size: (Adaptive)  100.00% 7.78GiB
   Min Size (Hard Limit):   0.40%   32.00   MiB
   Max Size (High Water):   248:1   7.78GiB

  ARC Size Breakdown:
   Recently Used Cache Size:50.00%  3.89GiB
   Frequently Used Cache Size:  50.00%  3.89GiB

  ARC Hash Breakdown:
   Elements Max:32.31k
   Elements Current:99.78%  32.24k
   Collisions:  40.54k
   Chain Max:   3
   Chains:  

[Kernel-packages] [Bug 1574342] Re: Ship arcstat.py and arc_summary.py with zfsutils-linux

[scotte]

Testing with 0.6.5.6-0ubuntu12 confirms the tools are now available as
expected. Thank you!

As far as names ending in .py - while it should be fixed, currently they
come that way directly from  zfsonlinux.

-- 
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https://bugs.launchpad.net/bugs/1574342

Title:
  Ship arcstat.py and arc_summary.py with zfsutils-linux

Status in zfs-linux package in Ubuntu:
  In Progress
Status in zfs-linux source package in Xenial:
  Fix Committed
Status in zfs-linux source package in Yakkety:
  In Progress

Bug description:
  [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 statistics
  https://github.com/zfsonlinux/zfs/blob/master/cmd/arc_summary

  * arcstat.py : Print out ZFS ARC Statistics exported via kstat(1)
  https://github.com/zfsonlinux/zfs/tree/master/cmd/arcstat

  * dbufstat.py: Print out statistics for all cached dmu buffers
  https://github.com/zfsonlinux/zfs/blob/master/cmd/dbufstat

  [Test Case]

  # rmadison zfsutils-linux
  ...
   zfsutils-linux | 0.6.5.6-0ubuntu10  | xenial-updates
  ...

  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.6-0ubuntu10_amd64.deb | egrep 
"arcstat|arc_summary|dbufstat"

  # You will notice there are not present.

  [Regression Potential]

  None expected, debian package[1] has already made the change to build
  the python scripts.

  [1]
  Package: zfsutils-linux
  Source: zfs-linux
  Version: 0.6.5.7-1
  Architecture: amd64
  Maintainer: Debian ZFS on Linux maintainers 


  # List contents of a deb package.
  $ dpkg -c zfsutils-linux_0.6.5.7-1_amd64.deb | egrep -i "arc|dbufstat"
  -rwxr-xr-x root/root 40751 2016-05-31 03:40 ./bin/arc_summary.py
  -rwxr-xr-x root/root 13057 2016-05-31 03:40 ./bin/arcstat.py
  -rwxr-xr-x root/root 18718 2016-05-31 03:40 ./bin/dbufstat.py

  [Other Info]

  * This is based on the following Debian commits :

  Debian git commits
  ===
  commit 730989397063955d60a1845003cfb7433eba1e52
  Author: Aron Xu 
  Date: Tue Apr 26 17:01:29 2016 +0800

  Add dh-python to b-d

  --

  commit 814413118fb88de3ce596a87a8a011f50c225fdd
  Author: Aron Xu 
  Date: Sun Nov 22 15:44:16 2015 +0800

  Add python related dependencies
  ===

  * Despite what Debian did by adding theses script under /bin.
    I'll add them under /usr/sbin, which is more appropriate.

  * Unfortunately manpage for theses 3 program seems limited.
    There is none in Debian nor git upstream repo.

  The only manpage I found is for arcstat online :

  http://linux.die.net/man/1/arcstat

  [Original Description]

  arcstat.py and arc_summary.py are valuable tools to determine ZFS' ARC
  usage, it is not obvious why they are not included in zfsutils-linux.
  As ubuntu-minimal already depends on python3 it should be safe to
  assume python is available, or am I mistaken here?

  arcstat.py gives an iostat-like overview about ARC reads, hit rate, current 
and target size in regular intervals:
  # ./arcstat.py 1
  time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz c
  19:22:33 0 0  0 00 00 00   2.0G  7.8G
  19:22:34 3 0  0 00 00 00   2.0G  7.8G
  19:22:3521 0  0 00 00 00   2.0G  7.8G
  ^C

  arc_summary.py shows a more detailed overview of the current ARC status and 
ZFS tunables:
  # ./arc_summary.py

  
  ZFS Subsystem Report  Sun Apr 24 19:23:25 2016
  ARC Summary: (HEALTHY)
   Memory Throttle Count:   0

  ARC Misc:
   Deleted: 46
   Mutex Misses:0
   Evict Skips: 0

  ARC Size: 25.10%  1.95GiB
   Target Size: (Adaptive)  100.00% 7.78GiB
   Min Size (Hard Limit):   0.40%   32.00   MiB
   Max Size (High Water):   248:1   7.78GiB

  ARC Size Breakdown:
   Recently Used Cache Size:50.00%  3.89GiB
   Frequently Used Cache Size:  50.00%  3.89GiB

  ARC Hash Breakdown:
   Elements Max:32.31k
   Elements Current:99.78%  32.24k
   Collisions:  40.54k
   Chain Max:   3
   Chains:  240

  ARC Total accesses:   4.54m
   Cache Hit Ratio: 99.39%  4.51m
   Cache Miss Ratio:0.61%   27.74k
   Actual Hit Ratio:98.76%  4.48m

   Data Demand Efficiency:  

[Kernel-packages] [Bug 1304001] Re: xen:balloon errors in 14.04 beta

[scotte]

Will this patch go out in 3.13.0-38 this week?

I'm assuming that the discussion around 'linux-keystone' is something
different. Regardless, please do not drop this fix from 3.13.0-38 as
we're expecting it this week per Stefan's comments above - and we have
already verified it resolves the issue.

-- 
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https://bugs.launchpad.net/bugs/1304001

Title:
   xen:balloon errors in 14.04 beta

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Committed
Status in “linux” source package in Utopic:
  Fix Committed

Bug description:
  SRU Justification:
  [Impact]
  The following errors may occur on HVM instances on EC2: xen:balloon: 
reserve_additional_memory: add_memory() failed: -17

  [Test Case]
  Boot Ubuntu Trusty 3.13 series HVM instances and check dmesg for this error 
message.

  [Fix]
  A minimal fix for this bug can be found here:
  
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3dcf63677d4eb7fdfc13290c8558c301d2588fe8
  This allows the ballooning to be cancelled if adding new memory failed which 
means that the error message is printed once instead of repeatedly.

  There should still be effort to root cause this issue and determine
  how to avoid the ballooning errors in the first place. I still think
  this patch should be applied to alleviate symptoms until root cause is
  discovered.

  --

  Xen balloon errors on HVM instances on EC2 (Xen 4.2.amazon):

  ubuntu@ip-10-63-20-99:~$ uname -a
  Linux ip-10-63-20-99 3.13.0-23-generic #45-Ubuntu SMP Fri Apr 4 06:58:38 UTC 
2014 x86_64 x86_64 x86_64 GNU/Linux
  ubuntu@ip-10-63-20-99:~$ dmesg  |grep xen
  [0.00] xen:events: Xen HVM callback vector for event delivery is 
enabled
  [0.494613] xen:balloon: Initialising balloon driver
  [0.496046] xen_balloon: Initialising balloon driver
  [0.500077] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [0.541047] Switched to clocksource xen
  [0.562579] xen: -- pirq=16 - irq=8 (gsi=8)
  [0.562622] xen: -- pirq=17 - irq=12 (gsi=12)
  [0.562649] xen: -- pirq=18 - irq=1 (gsi=1)
  [0.562673] xen: -- pirq=19 - irq=6 (gsi=6)
  [0.562705] xen: -- pirq=20 - irq=4 (gsi=4)
  [0.920527] xen: -- pirq=21 - irq=47 (gsi=47)
  [0.920596] xen:grant_table: Grant tables using version 1 layout
  [1.029661] xen_netfront: Initialising Xen virtual ethernet driver
  [1.236083] xenbus_probe_frontend: Device with no driver: device/vfb/0
  [2.516067] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [6.533941] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   14.560075] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   30.592064] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   62.688153] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   94.752164] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  126.816161] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  158.880084] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  190.944069] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  223.008141] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  255.072112] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  287.136190] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  319.200053] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  351.264164] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  383.328080] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  415.392077] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  447.456112] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  479.520128] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  511.584110] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  543.648181] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  575.712070] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  607.776178] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17

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[Kernel-packages] [Bug 1304001] Re: xen:balloon errors in 14.04 beta

[scotte]

I tested with the latest 3.13 kernel in trusty-proposed:

  Version table:
 3.13.0.40.47 0
500 http://archive.ubuntu.com/ubuntu/ trusty-proposed/main amd64 
Packages

I can confirm that the xen:balloon: Cannot add additional memory (-17)
message do not occur with this kernel in AWS with an m3 class instance
and HVM virtualization.

This looks good to me - fix verified.

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1304001

Title:
   xen:balloon errors in 14.04 beta

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Committed
Status in “linux” source package in Utopic:
  Fix Committed

Bug description:
  SRU Justification:
  [Impact]
  The following errors may occur on HVM instances on EC2: xen:balloon: 
reserve_additional_memory: add_memory() failed: -17

  [Test Case]
  Boot Ubuntu Trusty 3.13 series HVM instances and check dmesg for this error 
message.

  [Fix]
  A minimal fix for this bug can be found here:
  
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3dcf63677d4eb7fdfc13290c8558c301d2588fe8
  This allows the ballooning to be cancelled if adding new memory failed which 
means that the error message is printed once instead of repeatedly.

  There should still be effort to root cause this issue and determine
  how to avoid the ballooning errors in the first place. I still think
  this patch should be applied to alleviate symptoms until root cause is
  discovered.

  --

  Xen balloon errors on HVM instances on EC2 (Xen 4.2.amazon):

  ubuntu@ip-10-63-20-99:~$ uname -a
  Linux ip-10-63-20-99 3.13.0-23-generic #45-Ubuntu SMP Fri Apr 4 06:58:38 UTC 
2014 x86_64 x86_64 x86_64 GNU/Linux
  ubuntu@ip-10-63-20-99:~$ dmesg  |grep xen
  [0.00] xen:events: Xen HVM callback vector for event delivery is 
enabled
  [0.494613] xen:balloon: Initialising balloon driver
  [0.496046] xen_balloon: Initialising balloon driver
  [0.500077] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [0.541047] Switched to clocksource xen
  [0.562579] xen: -- pirq=16 - irq=8 (gsi=8)
  [0.562622] xen: -- pirq=17 - irq=12 (gsi=12)
  [0.562649] xen: -- pirq=18 - irq=1 (gsi=1)
  [0.562673] xen: -- pirq=19 - irq=6 (gsi=6)
  [0.562705] xen: -- pirq=20 - irq=4 (gsi=4)
  [0.920527] xen: -- pirq=21 - irq=47 (gsi=47)
  [0.920596] xen:grant_table: Grant tables using version 1 layout
  [1.029661] xen_netfront: Initialising Xen virtual ethernet driver
  [1.236083] xenbus_probe_frontend: Device with no driver: device/vfb/0
  [2.516067] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [6.533941] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   14.560075] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   30.592064] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   62.688153] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [   94.752164] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  126.816161] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  158.880084] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  190.944069] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  223.008141] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  255.072112] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  287.136190] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  319.200053] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  351.264164] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  383.328080] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  415.392077] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  447.456112] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  479.520128] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  511.584110] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  543.648181] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  575.712070] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17
  [  607.776178] xen:balloon: reserve_additional_memory: add_memory() failed: 
-17

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