linux-kernel - Re: [PATCH] x86: make mm/gup.c more virtualization friendly

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Message-ID: <20080918101525.GA20967@elte.hu>
Date:	Thu, 18 Sep 2008 12:15:25 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jan Beulich <jbeulich@...ell.com>
Cc:	tglx@...utronix.de, hpa@...or.com, Nick Piggin <npiggin@...e.de>,
	linux-kernel@...r.kernel.org, Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [PATCH] x86: make mm/gup.c more virtualization friendly


* Jan Beulich <jbeulich@...ell.com> wrote:

> Since pte_flags() is much cheaper than pte_val() in some virtualized
> environments (namely, Xen), use the former whereever possible.
> 
> Signed-off-by: Jan Beulich <jbeulich@...ell.com>
> Cc: Nick Piggin <npiggin@...e.de>

applied to tip/x86/core, thanks Jan.

	Ingo
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