linux-kernel - Re: [RFC] Limit the size of the pagecache

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Date:	Fri, 26 Jan 2007 02:27:15 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Aubrey Li <aubreylee@...il.com>,
	Christoph Lameter <clameter@....com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Robin Getz <rgetz@...ckfin.uclinux.org>,
	"Hennerich, Michael" <Michael.Hennerich@...log.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, dgc@....com
Subject: Re: [RFC] Limit the size of the pagecache

On Wed, 24 Jan 2007 15:03:23 +1100
Nick Piggin <nickpiggin@...oo.com.au> wrote:

> 
> Yeah, it will be failing at order=4, because the allocator won't try
> very hard reclaim pagecache pages at that cutoff point. This needs to
> be fixed in the allocator.

A simple and perhaps sufficient fix for this nommu problem would be to replace
the magic "3" in __alloc_pages() with a tunable.
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