Messages in this thread |  | | Date | Wed, 7 Sep 2011 08:37:10 +0200 | | Subject | Re: v3.1-rc5: Weird kernel log message when resuming avout NMI received | | From | Francis Moreau <> |
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Guys,
Just to let you know that I'm still getting this warning with 3.1-rc5
On Tue, Aug 16, 2011 at 5:07 PM, Francis Moreau <francis.moro@gmail.com> wrote: > Peter, > > On Mon, Aug 15, 2011 at 10:37 AM, Francis Moreau <francis.moro@gmail.com> wrote: >> Hello Peter, >> >> Sorry for the loooonnng delay but summer rest :) >> >> On Mon, Aug 1, 2011 at 1:05 PM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote: >>> On Sun, 2011-07-31 at 19:32 +0400, Cyrill Gorcunov wrote: >>> >>>> > >> I'm seeing those kernel message when resuming: >>>> > >> >>>> > >> [ 524.973283] Uhhuh. NMI received for unknown reason 3d on CPU 0. >>>> > >> [ 524.973288] Do you have a strange power saving mode enabled? >>>> > >> [ 524.973289] Dazed and confused, but trying to continue >>>> > >> >>>> > >> I don't know if it's important or not because the system seems to work >>>> > >> after but maybe it worths to report >>> >>> So I guess the problem is the NMI watchdog and suspend stuff not >>> shutting things down properly.. >>> >>> Argh, the PM notifier muck runs before the hotplug notifiers and it >>> doesn't avoid hotplug races on its own.. what crap. >>> >>> something like the below perhaps, compile tested only.. does it work? >> >> Thanks for the fix, I'm going to give it a test and report in 2 days. >> > > I'm trying to test the fix but have to stick with the 3.0 kernel and > your patch seems to be based on 3.1. > > So I had to backport a couple of patches otherwise I'm getting the > following error: > > CC kernel/events/core.o > kernel/events/core.c: In function ‘perf_pm_resume_cpu’: > kernel/events/core.c:7342: error: implicit declaration of function > ‘perf_ctx_lock’ > kernel/events/core.c:7350: error: implicit declaration of function > ‘perf_ctx_unlock’ > kernel/events/core.c: In function ‘perf_pm_suspend_cpu’: > kernel/events/core.c:7370: error: implicit declaration of function > ‘perf_event_sched_in’ > > Here are the patches that I backported on top of 3.0: > > perf: Collect the schedule-in rules in one function > perf: Change and simplify ctx::is_active semantics > perf: Simplify and fix __perf_install_in_context() > perf: Remove task_ctx_sched_in() > perf: Optimize event scheduling locking > perf: Clean up 'ctx' reference counting > perf: Optimize ctx_sched_out() > > After the second suspend/resume sequence I still have the same warning > except that the reason has changed to '2d': > > kernel:[ 404.091393] Uhhuh. NMI received for unknown reason 2d on CPU 0. > kernel:[ 404.091394] Do you have a strange power saving mode enabled? > kernel:[ 404.091396] Dazed and confused, but trying to continue >
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