Messages in this thread | | | Date | Thu, 19 Nov 2015 09:16:02 +0100 | From | Ingo Molnar <> | Subject | Re: i915.ko WC writes are slow after ea8596bb2d8d379 |
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* Chris Wilson <chris@chris-wilson.co.uk> wrote:
> > > A bisection pointed to > > > > > > commit ea8596bb2d8d37957f3e92db9511c50801689180 > > > Author: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> > > > Date: Thu Jul 18 20:47:53 2013 +0900 > > > > > > kprobes/x86: Remove unused text_poke_smp() and text_poke_smp_batch() functions > > > > > > of which the active ingredient was just > > > > > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > > > index b32ebf9..f4001e0 100644 > > > --- a/arch/x86/Kconfig > > > +++ b/arch/x86/Kconfig > > > @@ -2334,7 +2334,6 @@ config HAVE_ATOMIC_IOMAP > > > > > > config HAVE_TEXT_POKE_SMP > > > bool > > > - select STOP_MACHINE if SMP
Ouch...
This is certainly an educative example of how pure 'code removal' patches can have unintended side effects.
Is there a full fix patch available, and is anyone pushing that to Linus?
Thanks,
Ingo
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