--- Comment From ru...@us.ibm.com 2016-11-08 10:54 EDT---
(In reply to comment #14)
> I am confused. Commit 8117ac6a6c2fa0f847ff6a21a1f32c8d2c8501d0
> ('powerpc/powernv: Switch off MMU before entering nap/sleep/rvwinkle mode')
> has been in the kernel for awhile.
>
> git describe --contains 8117ac6a6c2f
> v3.19-rc1~22^2~6
Sorry. My error in grabbing the wrong commit for my query. It's the
update fix for that earlier commit that we are looking for.
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-
stable.git/commit/?id=56c46222af0d09149fadec2a3ce9d4889de01cc6
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https://bugs.launchpad.net/bugs/1639961
Title:
NMI watchdog: BUG: soft lockup during KVM guest migration test suite
Status in linux package in Ubuntu:
New
Bug description:
Hello Canonical.
We would like the changes in Commit 8117ac6a6c2f pulled into the
Ubuntu 16.10 stream to address the following issue:
== Comment: #0 - Balamuruhan S - 2016-09-23 08:48:52 ==
---Problem Description---
Softlock up and call trace observed from libvirtd during guest migration test
suite
---uname output---
# uname -a Linux ltc-hab1 4.8.0-11-generic #12-Ubuntu SMP Sat Sep 17 19:58:16
UTC 2016 ppc64le ppc64le ppc64le GNU/Linux
---System Hang---
NMI watchdog: BUG: soft lockup - CPU#24 stuck for 22s! [libvirtd:50800]
message is continuous and recovered the machine with reboot
84050.059159] INFO: rcu_sched self-detected stall on CPU
[84050.059339]24-...: (5659 ticks this GP) idle=fa5/141/0
softirq=549845/07 fqs=2176
[84050.059453] (t=5250 jiffies g=690268 c=690267 q=484)
[84055.126993] NMI watchdog: BUG: soft lockup - CPU#24 stuck for 22s!
[libvirtd:50800]
[84104.509395] INFO: rcu_sched self-detected stall on CPU
[84104.509591]24-...: (5659 ticks this GP) idle=5df/141/0
softirq=562249/562249 fqs=2364
[84104.509820] (t=5250 jiffies g=690387 c=690386 q=351)
[84107.125310] NMI watchdog: BUG: soft lockup - CPU#24 stuck for 22s!
[virsh:56627]
[84163.387536] INFO: rcu_sched self-detected stall on CPU
[84163.387716]24-...: (5250 ticks this GP) idle=f69/142/0
softirq=562274/562274 fqs=2354
[84163.387960] (t=5251 jiffies g=690488 c=690487 q=297)
[84167.123420] NMI watchdog: BUG: soft lockup - CPU#24 stuck for 22s!
[virsh:56633]
[84226.401597] INFO: rcu_sched self-detected stall on CPU
[84226.401769]24-...: (21004 ticks this GP)
idle=f69/142/0 softirq=562274/562274 fqs=9697
[84226.402012] (t=21005 jiffies g=690488 c=690487 q=1145)
[84289.415706] INFO: rcu_sched self-detected stall on CPU
[84289.415879]24-...: (36758 ticks this GP)
idle=f69/142/0 softirq=562274/562274 fqs=16889
[84289.416137] (t=36759 jiffies g=690488 c=690487 q=15499)
[84352.429857] INFO: rcu_sched self-detected stall on CPU
[84352.430038]24-...: (52512 ticks this GP)
idle=f69/142/0 softirq=562274/562274 fqs=23975
[84352.430269] (t=52513 jiffies g=690488 c=690487 q=16027)
[84415.444044] INFO: rcu_sched self-detected stall on CPU
[84415.444222]24-...: (68266 ticks this GP)
idle=f69/142/0 softirq=562274/562274 fqs=31005
[84415.34] (t=68267 jiffies g=690488 c=690487 q=16554)
[84478.458262] INFO: rcu_sched self-detected stall on CPU
[84478.458421]24-...: (84020 ticks this GP)
idle=f69/142/0 softirq=562274/562274 fqs=38023
[84478.458677] (t=84021 jiffies g=690488 c=690487 q=17030)
[84541.472510] INFO: rcu_sched self-detected stall on CPU
[84541.472680]24-...: (99774 ticks this GP)
idle=f69/142/0 softirq=562274/562274 fqs=45068
[84541.472939] (t=99775 jiffies g=690488 c=690487 q=17512)
[84604.486783] INFO: rcu_sched self-detected stall on CPU
Thanks.
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