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Date:	Sat, 19 May 2007 13:35:01 +0200
From:	Andi Kleen <>
To:	Andrew Morton <>
Cc:	Fengguang Wu <>,,
	Andi Kleen <>,
	Jens Axboe <>,
	Oleg Nesterov <>,
	Steven Pratt <>,
	Ram Pai <>
Subject: Re: [PATCH 1/9] readahead: introduce PG_readahead

> We have the advantage that if the kernel very occasionally gets the wrong
> result for PageReadahead(page), nothing particularly bad will happen, so we
> can do racy things.
On 64bit there is no particular shortage of page flags. If you ever do
racy things please do them 32bit only.


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