Re: [PATCH] perf,x86: fix kernel crash with PEBS/BTS aftersuspend/resume

[Thomas Gleixner]

On Fri, 15 Mar 2013, Linus Torvalds wrote:

> On Fri, Mar 15, 2013 at 6:26 AM, Stephane Eranian <eranian@xxxxxxxxxx> 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? Doing
> 
>     git grep "case CPU_" arch/x86/kernel/cpu
> 
> shows that the perf layer seems to be full of this kind of BS. This is
> all CPU state, it should be initialized by the regular CPU
> initialization code, not hooked up with some random callbacks.

It's on my list ....
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