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Message-ID: <3C8652CE.47182A24@zip.com.au>
Date: Wed, 06 Mar 2002 09:33:02 -0800
From: Andrew Morton <akpm@zip.com.au>
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To: Bulent Abali <abali@us.ibm.com>
CC: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] struct page shrinkage
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Bulent Abali wrote:
> 
> >Rik van Riel wrote:
> >>
> >> +               clear_bit(PG_locked, &p->flags);
> >
> >Please don't do this.  Please use the macros.  If they're not
> >there, please create them.
> >
> >Bypassing the abstractions in this manner confounds people
> >who are implementing global locked-page accounting.
> >
> 
> Andrew,
> I have an application which needs to know the total number of locked and
> dirtied pages at any given time.  In which application locked-page
> accounting is done?   I don't see it in base 2.5.5.   Are there any patches
> or such that you can give pointers to?

This is in the ebulliently growing delayed-allocate and
buffer_head-bypass patches at

	http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.6-pre2/

The implementation you're looking for is in dalloc-10-core.patch:
mm.h and mm/page_alloc.c

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