linux-kernel - Re: [PATCH -mm 17/25] Mlocked Pages are non-reclaimable

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Message-ID: <20080610171400.149886cf@cuia.bos.redhat.com>
Date:	Tue, 10 Jun 2008 17:14:00 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, lee.schermerhorn@...com,
	kosaki.motohiro@...fujitsu.com, linux-mm@...ck.org,
	eric.whitney@...com
Subject: Re: [PATCH -mm 17/25] Mlocked Pages are non-reclaimable

On Tue, 10 Jun 2008 05:31:30 +0200
Nick Piggin <npiggin@...e.de> wrote:

> If we eventually run out of page flags on 32 bit, then sure this might be
> one we could look at geting rid of. Once the code has proven itself.

Yes, after the code has proven stable, we can probably get
rid of the PG_mlocked bit and use only PG_unevictable to mark
these pages.

Lee, Kosaki-san, do you see any problem with that approach?
Is the PG_mlocked bit really necessary for non-debugging
purposes?

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