linux-kernel - Re: [PATCH 19/19] mm, numa: retry failed page migrations

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Message-ID: <alpine.DEB.2.00.1208021538180.32229@router.home>
Date:	Thu, 2 Aug 2012 15:40:11 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
cc:	mingo@...nel.org, riel@...hat.com, oleg@...hat.com, pjt@...gle.com,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	tglx@...utronix.de, Lee.Schermerhorn@...com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 19/19] mm, numa: retry failed page migrations

On Tue, 31 Jul 2012, Peter Zijlstra wrote:

> Keep track of how many NUMA page migrations succeeded and
> failed (in a way that wants retrying later) per process.

It would be good if we could also somehow determine if that
migration actually made sense?

Were there enough accesses to the page so that the effort to migrate
the page was amortized?

Still skeptical on this endeavor.

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