linux-kernel - Re: [PATCH] mm/filemap.c: unconditionally call mark_page

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Date:	Thu, 15 Mar 2007 13:04:27 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Nick Piggin <npiggin@...e.de>
CC:	Chuck Ebbert <cebbert@...hat.com>,
	Ashif Harji <asharji@...uwaterloo.ca>, linux-mm@...ck.org,
	Jan Kara <jack@...e.cz>, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH] mm/filemap.c: unconditionally call mark_page_accessed

Nick Piggin wrote:

> A change to make database style random read() workloads perform better, by
> calling mark_page_accessed for some non-page-aligned reads broke the case of
> < PAGE_CACHE_SIZE files, which will not get their prev_index moved past the
> first page.
> 
> Combine both heuristics for marking the page accessed.
> 
> Signed-off-by: Nick Piggin <npiggin@...e.de>

Acked-by: Rik van Riel <riel@...hat.com>

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