Re: [Xen-devel] [PATCH] mm/x86: Patch out arch_flush_lazy_mmu_mode() when running on bare metal

[Josh Boyer <jwboyer@xxxxxxxxxx>]

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

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel