On Sat, Mar 16, 2013 at 1:56 PM, Linus Torvalds
wrote:
> On Sat, Mar 16, 2013 at 9:11 AM, Parag Warudkar wrote:
>>
>> This seems to trigger a WARN_ON during suspend/resume.
>
> Ugh, yes. It's practically harmless, but it's ugly and technically
> wrong (we're using wrmsr_on_cpu() on our current
On Sat, Mar 16, 2013 at 9:11 AM, Parag Warudkar wrote:
>
> This seems to trigger a WARN_ON during suspend/resume.
Ugh, yes. It's practically harmless, but it's ugly and technically
wrong (we're using wrmsr_on_cpu() on our current cpu, but in a context
where using it on anything else would be
On Fri, Mar 15, 2013 at 9:26 AM, Stephane Eranian wrote:
>
> This patch fixes a kernel crash when using precise sampling (PEBS)
> after a suspend/resume. Turns out the CPU notifier code is not invoked
> on CPU0 (BP). Therefore, the DS_AREA (used by PEBS) is not restored properly
> by the kernel
On Fri, Mar 15, 2013 at 9:26 AM, Stephane Eranian eran...@google.com wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume. Turns out the CPU notifier code is not invoked
on CPU0 (BP). Therefore, the DS_AREA (used by PEBS) is not restored properly
by
On Sat, Mar 16, 2013 at 9:11 AM, Parag Warudkar parag.l...@gmail.com wrote:
This seems to trigger a WARN_ON during suspend/resume.
Ugh, yes. It's practically harmless, but it's ugly and technically
wrong (we're using wrmsr_on_cpu() on our current cpu, but in a context
where using it on anything
On Sat, Mar 16, 2013 at 1:56 PM, Linus Torvalds
torva...@linux-foundation.org wrote:
On Sat, Mar 16, 2013 at 9:11 AM, Parag Warudkar parag.l...@gmail.com wrote:
This seems to trigger a WARN_ON during suspend/resume.
Ugh, yes. It's practically harmless, but it's ugly and technically
wrong
On Fri, Mar 15, 2013 at 2:56 PM, Stephane Eranian wrote:
> On Fri, Mar 15, 2013 at 9:53 PM, Shuah Khan wrote:
>> On Fri, Mar 15, 2013 at 2:31 PM, Greg KH wrote:
>>> On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
This patch fixes a kernel crash when using precise
On Fri, Mar 15, 2013 at 09:49:00PM +0100, Stephane Eranian wrote:
> On Fri, Mar 15, 2013 at 9:31 PM, Greg KH wrote:
> >
> > On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
> > >
> > > This patch fixes a kernel crash when using precise sampling (PEBS)
> > > after a
On Fri, Mar 15, 2013 at 9:53 PM, Shuah Khan wrote:
> On Fri, Mar 15, 2013 at 2:31 PM, Greg KH wrote:
>> On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
>>>
>>> This patch fixes a kernel crash when using precise sampling (PEBS)
>>> after a suspend/resume. Turns out the CPU
On Fri, Mar 15, 2013 at 2:31 PM, Greg KH wrote:
> On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
>>
>> This patch fixes a kernel crash when using precise sampling (PEBS)
>> after a suspend/resume. Turns out the CPU notifier code is not invoked
>> on CPU0 (BP). Therefore, the
On Fri, 15 Mar 2013, Linus Torvalds wrote:
> On Fri, Mar 15, 2013 at 6:26 AM, Stephane Eranian wrote:
> >
> > This patch fixes a kernel crash when using precise sampling (PEBS)
> > after a suspend/resume.
>
> Yup, works. Applied.
>
> Can we please get rid of the crazy CPU notifier crap from
On Fri, Mar 15, 2013 at 9:31 PM, Greg KH wrote:
>
> On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
> >
> > This patch fixes a kernel crash when using precise sampling (PEBS)
> > after a suspend/resume. Turns out the CPU notifier code is not invoked
> > on CPU0 (BP). Therefore,
On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
>
> This patch fixes a kernel crash when using precise sampling (PEBS)
> after a suspend/resume. Turns out the CPU notifier code is not invoked
> on CPU0 (BP). Therefore, the DS_AREA (used by PEBS) is not restored properly
> by the
On Fri, Mar 15, 2013 at 6:26 AM, Stephane Eranian wrote:
>
> This patch fixes a kernel crash when using precise sampling (PEBS)
> after a suspend/resume.
Yup, works. Applied.
Can we please get rid of the crazy CPU notifier crap from the perf
code, and do this like we do most other wrmsr's etc?
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume. Turns out the CPU notifier code is not invoked
on CPU0 (BP). Therefore, the DS_AREA (used by PEBS) is not restored properly
by the kernel and keeps it power-on/resume value of 0 causing any PEBS
measurement
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume. Turns out the CPU notifier code is not invoked
on CPU0 (BP). Therefore, the DS_AREA (used by PEBS) is not restored properly
by the kernel and keeps it power-on/resume value of 0 causing any PEBS
measurement
On Fri, Mar 15, 2013 at 6:26 AM, Stephane Eranian eran...@google.com wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume.
Yup, works. Applied.
Can we please get rid of the crazy CPU notifier crap from the perf
code, and do this like we do most
On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume. Turns out the CPU notifier code is not invoked
on CPU0 (BP). Therefore, the DS_AREA (used by PEBS) is not restored properly
by the
On Fri, Mar 15, 2013 at 9:31 PM, Greg KH gre...@linuxfoundation.org wrote:
On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume. Turns out the CPU notifier code is not invoked
on CPU0
On Fri, 15 Mar 2013, Linus Torvalds wrote:
On Fri, Mar 15, 2013 at 6:26 AM, Stephane Eranian eran...@google.com wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume.
Yup, works. Applied.
Can we please get rid of the crazy CPU notifier crap
On Fri, Mar 15, 2013 at 2:31 PM, Greg KH gre...@linuxfoundation.org wrote:
On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume. Turns out the CPU notifier code is not invoked
on CPU0 (BP).
On Fri, Mar 15, 2013 at 9:53 PM, Shuah Khan shuahk...@gmail.com wrote:
On Fri, Mar 15, 2013 at 2:31 PM, Greg KH gre...@linuxfoundation.org wrote:
On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a
On Fri, Mar 15, 2013 at 09:49:00PM +0100, Stephane Eranian wrote:
On Fri, Mar 15, 2013 at 9:31 PM, Greg KH gre...@linuxfoundation.org wrote:
On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
This patch fixes a kernel crash when using precise sampling (PEBS)
after a
On Fri, Mar 15, 2013 at 2:56 PM, Stephane Eranian eran...@google.com wrote:
On Fri, Mar 15, 2013 at 9:53 PM, Shuah Khan shuahk...@gmail.com wrote:
On Fri, Mar 15, 2013 at 2:31 PM, Greg KH gre...@linuxfoundation.org wrote:
On Fri, Mar 15, 2013 at 02:26:07PM +0100, Stephane Eranian wrote:
This
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