linux-kernel - Re: [tip:numa/core] sched/numa/mm: Improve migration

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Message-ID: <1350657808.2768.29.camel@twins>
Date:	Fri, 19 Oct 2012 16:43:28 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	linux-tip-commits@...r.kernel.org, linux-kernel@...r.kernel.org,
	hpa@...or.com, mingo@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, mgorman@...e.de, tglx@...utronix.de
Subject: Re: [tip:numa/core] sched/numa/mm: Improve migration

On Fri, 2012-10-19 at 09:51 -0400, Johannes Weiner wrote:
> It's slightly ugly that migrate_page_copy() actually modifies the
> existing page (deactivation, munlock) when you end up having to revert
> back to it. 

The worst is actually calling copy_huge_page() on a THP.. it seems to
work though ;-)


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