Re: [PATCH] mm/x86: Patch out arch_flush_lazy_mmu_mode() whenrunning on bare metal

[Josh Boyer]

On Fri, Mar 01, 2013 at 12:37:20AM +0100, Borislav Petkov wrote:
> On Thu, Feb 28, 2013 at 05:55:49PM -0500, Boris Ostrovsky wrote:
> > Invoking arch_flush_lazy_mmu_mode() results in calls to
> > preempt_enable()/disable() which may have performance impact.
> > 
> > Since lazy MMU is not used on bare metal we can patch away
> > arch_flush_lazy_mmu_mode() so that it is never called in such
> > environment.
> > 
> > Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> 
> Looks straight-forward enough to me.
> 
> Acked-by: Borislav Petkov <bp@xxxxxxx>

I'll try to get someone to test this tomorrow.

josh
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