* NMI received for unknown reason, 2.6.38-rc6 regression?
@ 2011-03-01 15:03 denys
2011-03-01 16:08 ` Cyrill Gorcunov
0 siblings, 1 reply; 6+ messages in thread
From: denys @ 2011-03-01 15:03 UTC (permalink / raw)
To: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, x86, linux-kernel
I upgrade around 140 hosts (from 2.6.33 till 2.6.37), and got on many
of them error/warining, flooding kernel log. Here is short snapshot:
[ 1882.057474] Uhhuh. NMI received for unknown reason 3c on CPU 0.
[ 1882.057576] Do you have a strange power saving mode enabled?
[ 1882.057672] Dazed and confused, but trying to continue
[ 2421.419732] Uhhuh. NMI received for unknown reason 3c on CPU 0.
[ 2421.419835] Do you have a strange power saving mode enabled?
[ 2421.419930] Dazed and confused, but trying to continue
[ 2636.016831] Uhhuh. NMI received for unknown reason 2c on CPU 1.
[ 2636.016934] Do you have a strange power saving mode enabled?
[ 2636.017003] Dazed and confused, but trying to continue
Full dmesg from 2 machines:
http://www.nuclearcat.com/dmesg1.txt
http://www.nuclearcat.com/dmesg2.txt
I can provide more, if required.
It seems nmi_watchdog is enabled by default, and it is causing issue. I
am checking now with nmi_watchdog=0, but i need more time to confirm
that.
Also i am experiencing some problem with ppp users(all of them is pppoe
servers), but i am not sure it is related to that, so maybe this NMI
warning is just cosmetic regression.
All systems is x86, same kernel config.
If you need more information - let me know.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: NMI received for unknown reason, 2.6.38-rc6 regression?
2011-03-01 15:03 NMI received for unknown reason, 2.6.38-rc6 regression? denys
@ 2011-03-01 16:08 ` Cyrill Gorcunov
2011-03-01 16:42 ` denys
0 siblings, 1 reply; 6+ messages in thread
From: Cyrill Gorcunov @ 2011-03-01 16:08 UTC (permalink / raw)
To: denys; +Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, x86, linux-kernel
On 03/01/2011 06:03 PM, denys@visp.net.lb wrote:
> I upgrade around 140 hosts (from 2.6.33 till 2.6.37), and got on many of them error/warining, flooding kernel log. Here is short snapshot:
>
> [ 1882.057474] Uhhuh. NMI received for unknown reason 3c on CPU 0.
> [ 1882.057576] Do you have a strange power saving mode enabled?
> [ 1882.057672] Dazed and confused, but trying to continue
> [ 2421.419732] Uhhuh. NMI received for unknown reason 3c on CPU 0.
> [ 2421.419835] Do you have a strange power saving mode enabled?
> [ 2421.419930] Dazed and confused, but trying to continue
> [ 2636.016831] Uhhuh. NMI received for unknown reason 2c on CPU 1.
> [ 2636.016934] Do you have a strange power saving mode enabled?
> [ 2636.017003] Dazed and confused, but trying to continue
>
> Full dmesg from 2 machines:
> http://www.nuclearcat.com/dmesg1.txt
> http://www.nuclearcat.com/dmesg2.txt
> I can provide more, if required.
>
> It seems nmi_watchdog is enabled by default, and it is causing issue. I am checking now with nmi_watchdog=0, but i need more time to confirm that.
> Also i am experiencing some problem with ppp users(all of them is pppoe servers), but i am not sure it is related to that, so maybe this NMI warning is just cosmetic regression.
>
> All systems is x86, same kernel config.
> If you need more information - let me know.
>
nmi_watchdog=0 should help here, actually a nit was fixed by https://patchwork.kernel.org/patch/566611/
which is not in 2.6.38-rc6 but I rather suspect it'll be in -rc7 or final .38. If you have an ability
to pickup it and test -- this would be great!
--
Cyrill
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: NMI received for unknown reason, 2.6.38-rc6 regression?
2011-03-01 16:08 ` Cyrill Gorcunov
@ 2011-03-01 16:42 ` denys
2011-03-01 17:03 ` Cyrill Gorcunov
2011-03-02 7:59 ` Ingo Molnar
0 siblings, 2 replies; 6+ messages in thread
From: denys @ 2011-03-01 16:42 UTC (permalink / raw)
To: Cyrill Gorcunov
Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, x86, linux-kernel
On Tue, 01 Mar 2011 19:08:43 +0300, Cyrill Gorcunov wrote:
> On 03/01/2011 06:03 PM, denys@visp.net.lb wrote:
>> I upgrade around 140 hosts (from 2.6.33 till 2.6.37), and got on
>> many of them error/warining, flooding kernel log. Here is short
>> snapshot:
>>
>> [ 1882.057474] Uhhuh. NMI received for unknown reason 3c on CPU 0.
>> [ 1882.057576] Do you have a strange power saving mode enabled?
>> [ 1882.057672] Dazed and confused, but trying to continue
>> [ 2421.419732] Uhhuh. NMI received for unknown reason 3c on CPU 0.
>> [ 2421.419835] Do you have a strange power saving mode enabled?
>> [ 2421.419930] Dazed and confused, but trying to continue
>> [ 2636.016831] Uhhuh. NMI received for unknown reason 2c on CPU 1.
>> [ 2636.016934] Do you have a strange power saving mode enabled?
>> [ 2636.017003] Dazed and confused, but trying to continue
>>
>> Full dmesg from 2 machines:
>> http://www.nuclearcat.com/dmesg1.txt
>> http://www.nuclearcat.com/dmesg2.txt
>> I can provide more, if required.
>>
>> It seems nmi_watchdog is enabled by default, and it is causing
>> issue. I am checking now with nmi_watchdog=0, but i need more time to
>> confirm that.
>> Also i am experiencing some problem with ppp users(all of them is
>> pppoe servers), but i am not sure it is related to that, so maybe this
>> NMI warning is just cosmetic regression.
>>
>> All systems is x86, same kernel config.
>> If you need more information - let me know.
>>
>
> nmi_watchdog=0 should help here, actually a nit was fixed by
> https://patchwork.kernel.org/patch/566611/
> which is not in 2.6.38-rc6 but I rather suspect it'll be in -rc7 or
> final .38. If you have an ability
> to pickup it and test -- this would be great!
I test it, and it seems helps. At least on one host, and yes, seems all
of them P4.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: NMI received for unknown reason, 2.6.38-rc6 regression?
2011-03-01 16:42 ` denys
@ 2011-03-01 17:03 ` Cyrill Gorcunov
2011-03-02 7:59 ` Ingo Molnar
1 sibling, 0 replies; 6+ messages in thread
From: Cyrill Gorcunov @ 2011-03-01 17:03 UTC (permalink / raw)
To: denys; +Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, x86, linux-kernel
On 03/01/2011 07:42 PM, denys@visp.net.lb wrote:
...
>>
>> nmi_watchdog=0 should help here, actually a nit was fixed by
>> https://patchwork.kernel.org/patch/566611/
>> which is not in 2.6.38-rc6 but I rather suspect it'll be in -rc7 or
>> final .38. If you have an ability
>> to pickup it and test -- this would be great!
>
> I test it, and it seems helps. At least on one host, and yes, seems all of them P4.
>
ok, thanks! ping me if any :)
--
Cyrill
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: NMI received for unknown reason, 2.6.38-rc6 regression?
2011-03-01 16:42 ` denys
2011-03-01 17:03 ` Cyrill Gorcunov
@ 2011-03-02 7:59 ` Ingo Molnar
2011-03-02 13:16 ` denys
1 sibling, 1 reply; 6+ messages in thread
From: Ingo Molnar @ 2011-03-02 7:59 UTC (permalink / raw)
To: denys
Cc: Cyrill Gorcunov, Thomas Gleixner, Ingo Molnar, H. Peter Anvin,
x86, linux-kernel
* denys@visp.net.lb <denys@visp.net.lb> wrote:
> On Tue, 01 Mar 2011 19:08:43 +0300, Cyrill Gorcunov wrote:
> >On 03/01/2011 06:03 PM, denys@visp.net.lb wrote:
> >>I upgrade around 140 hosts (from 2.6.33 till 2.6.37), and got on
> >>many of them error/warining, flooding kernel log. Here is short
> >>snapshot:
> >>
> >>[ 1882.057474] Uhhuh. NMI received for unknown reason 3c on CPU 0.
> >>[ 1882.057576] Do you have a strange power saving mode enabled?
> >>[ 1882.057672] Dazed and confused, but trying to continue
> >>[ 2421.419732] Uhhuh. NMI received for unknown reason 3c on CPU 0.
> >>[ 2421.419835] Do you have a strange power saving mode enabled?
> >>[ 2421.419930] Dazed and confused, but trying to continue
> >>[ 2636.016831] Uhhuh. NMI received for unknown reason 2c on CPU 1.
> >>[ 2636.016934] Do you have a strange power saving mode enabled?
> >>[ 2636.017003] Dazed and confused, but trying to continue
> >>
> >>Full dmesg from 2 machines:
> >>http://www.nuclearcat.com/dmesg1.txt
> >>http://www.nuclearcat.com/dmesg2.txt
> >>I can provide more, if required.
> >>
> >>It seems nmi_watchdog is enabled by default, and it is causing
> >>issue. I am checking now with nmi_watchdog=0, but i need more
> >>time to confirm that.
> >>Also i am experiencing some problem with ppp users(all of them
> >>is pppoe servers), but i am not sure it is related to that, so
> >>maybe this NMI warning is just cosmetic regression.
> >>
> >>All systems is x86, same kernel config.
> >>If you need more information - let me know.
> >>
> >
> >nmi_watchdog=0 should help here, actually a nit was fixed by
> >https://patchwork.kernel.org/patch/566611/
> >which is not in 2.6.38-rc6 but I rather suspect it'll be in -rc7 or
> >final .38. If you have an ability
> >to pickup it and test -- this would be great!
> I test it, and it seems helps. At least on one host, and yes, seems
> all of them P4.
Mind checking -rc7, does it work 'out of box', without requiring any workarounds?
-rc7 already has this fix included:
7d44ec193d95: perf, x86: P4 PMU: Fix spurious NMI messages
-rc6 did not have it yet.
Thanks,
Ingo
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: NMI received for unknown reason, 2.6.38-rc6 regression?
2011-03-02 7:59 ` Ingo Molnar
@ 2011-03-02 13:16 ` denys
0 siblings, 0 replies; 6+ messages in thread
From: denys @ 2011-03-02 13:16 UTC (permalink / raw)
To: Ingo Molnar
Cc: Cyrill Gorcunov, Thomas Gleixner, Ingo Molnar, H. Peter Anvin,
x86, linux-kernel
On Wed, 2 Mar 2011 08:59:31 +0100, Ingo Molnar wrote:
> * denys@visp.net.lb <denys@visp.net.lb> wrote:
>
>> On Tue, 01 Mar 2011 19:08:43 +0300, Cyrill Gorcunov wrote:
>> >On 03/01/2011 06:03 PM, denys@visp.net.lb wrote:
>> >>I upgrade around 140 hosts (from 2.6.33 till 2.6.37), and got on
>> >>many of them error/warining, flooding kernel log. Here is short
>> >>snapshot:
>> >>
>> >>[ 1882.057474] Uhhuh. NMI received for unknown reason 3c on CPU 0.
>> >>[ 1882.057576] Do you have a strange power saving mode enabled?
>> >>[ 1882.057672] Dazed and confused, but trying to continue
>> >>[ 2421.419732] Uhhuh. NMI received for unknown reason 3c on CPU 0.
>> >>[ 2421.419835] Do you have a strange power saving mode enabled?
>> >>[ 2421.419930] Dazed and confused, but trying to continue
>> >>[ 2636.016831] Uhhuh. NMI received for unknown reason 2c on CPU 1.
>> >>[ 2636.016934] Do you have a strange power saving mode enabled?
>> >>[ 2636.017003] Dazed and confused, but trying to continue
>> >>
>> >>Full dmesg from 2 machines:
>> >>http://www.nuclearcat.com/dmesg1.txt
>> >>http://www.nuclearcat.com/dmesg2.txt
>> >>I can provide more, if required.
>> >>
>> >>It seems nmi_watchdog is enabled by default, and it is causing
>> >>issue. I am checking now with nmi_watchdog=0, but i need more
>> >>time to confirm that.
>> >>Also i am experiencing some problem with ppp users(all of them
>> >>is pppoe servers), but i am not sure it is related to that, so
>> >>maybe this NMI warning is just cosmetic regression.
>> >>
>> >>All systems is x86, same kernel config.
>> >>If you need more information - let me know.
>> >>
>> >
>> >nmi_watchdog=0 should help here, actually a nit was fixed by
>> >https://patchwork.kernel.org/patch/566611/
>> >which is not in 2.6.38-rc6 but I rather suspect it'll be in -rc7 or
>> >final .38. If you have an ability
>> >to pickup it and test -- this would be great!
>> I test it, and it seems helps. At least on one host, and yes, seems
>> all of them P4.
>
> Mind checking -rc7, does it work 'out of box', without requiring any
> workarounds?
> -rc7 already has this fix included:
>
> 7d44ec193d95: perf, x86: P4 PMU: Fix spurious NMI messages
>
> -rc6 did not have it yet.
Yes, rc7 fine too, tested it now.
>
> Thanks,
>
> Ingo
^ permalink raw reply [flat|nested] 6+ messages in thread
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2011-03-01 15:03 NMI received for unknown reason, 2.6.38-rc6 regression? denys
2011-03-01 16:08 ` Cyrill Gorcunov
2011-03-01 16:42 ` denys
2011-03-01 17:03 ` Cyrill Gorcunov
2011-03-02 7:59 ` Ingo Molnar
2011-03-02 13:16 ` denys
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