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Date: Mon, 26 Nov 2001 11:18:54 -0800 (PST)
Message-Id: <20011126.111854.102567147.davem@redhat.com>
To: mingo@elte.hu
Cc: velco@fadata.bg, linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: [PATCH] Scalable page cache
From: "David S. Miller" <davem@redhat.com>
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   From: Ingo Molnar <mingo@elte.hu>
   Date: Mon, 26 Nov 2001 22:09:02 +0100 (CET)
   
   something like this:
   
   - #define SetPageReferenced(page)    set_bit(PG_referenced, &(page)->flags)
   + #define SetPageReferenced(page) \
   +	if (!test_bit(PG_referenced), &(page)->flags) \
   +		set_bit(PG_referenced, &(page)->flags)
   
On some platforms all the {test_,}{clear,change,set}_bit() ops give
you this cache behavior.  How hard would it be to make ix86 act
similarly?
-
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