linux-kernel - Re: [PATCH 0/5] mm,debug: VM framework to capture memory reference pattern

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Message-ID: <64797.1309908804@turing-police.cc.vt.edu>
Date:	Tue, 05 Jul 2011 19:33:24 -0400
From:	Valdis.Kletnieks@...edu
To:	Ankita Garg <ankita@...ibm.com>
Cc:	linux-mm@...ck.org, svaidy@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] mm,debug: VM framework to capture memory reference pattern

On Tue, 05 Jul 2011 13:52:34 +0530, Ankita Garg said:

> by default) and scans through all pages of the specified tasks (including
> children/threads) running in the system. If the hardware reference bit in the
> page table is set, then the page is marked as accessed over the last sampling
> interval and the reference bit is cleared.

Does that cause any issues for other code in the mm subsystem that was
expecting to use the reference bit for something useful? (Similarly, if other
code in mm turns that bit *off* for its own reasons, does your code still
produce useful results?)

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