Messages in this thread | | | Date | Tue, 16 Aug 2011 17:07:45 +0200 | Subject | Re: v3.0: Weird kernel log message when resuming avout NMI received | From | Francis Moreau <> |
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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
Thanks -- Francis -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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