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[Martijn Heemels <1304001@xxxxxxxxxxxxxxxxxx>]

Looking good. I'm no expert on testing pre-release packages so please
correct me if I've done something wrong.

Tested on Utopic today (ami-540ba523 on a m3.medium amd64 hvm). It came
with kernel 3.16.0-24.32 which exhibits the xen:balloon error messages.

Upgraded to 3.16.0.24.25, the latest available in the regular repos.
Reboot. Still the same error messages.

Enabled the utopic-proposed repo and installed kernel 3.16.0.25.26. Reboot.
The messages no longer appear!

Seems good to me!

Regards, Martijn Heemels


On Fri, Nov 14, 2014 at 1:53 PM, Rafael David Tinoco <
rafael.tinoco@xxxxxxxxxxxxx> wrote:

> Hello
>
> Is possible for anyone to test Utopic kernel so we can flag this as
> "verification-done" and push this to be released asap ?
>
> Thank you very much
>
> Rafael Tinoco
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1304001
>
> Title:
>    xen:balloon errors in 14.04 beta
>
> To manage notifications about this bug go to:
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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
  [    0.000000] 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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