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List:       xen-devel
Subject:    Re: [Xen-devel] [PATCH] mm/x86: Patch out arch_flush_lazy_mmu_mode() when running on bare metal
From:       Borislav Petkov <bp () alien8 ! de>
Date:       2013-02-28 23:37:20
Message-ID: 20130228233720.GB17468 () pd ! tnic
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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@oracle.com>

Looks straight-forward enough to me.

Acked-by: Borislav Petkov <bp@suse.de>

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--

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