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

From: Borislav Petkov
Date: Thu Feb 28 2013 - 18:37:36 EST

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>


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