** Also affects: linux (Ubuntu Precise)
Importance: Undecided
Status: New
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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 Precise:
New
Status in linux source package in Trusty:
Fix Released
Status in linux source package in Utopic:
Fix Released
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.
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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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