linux-kernel - Re: [RFC 0/7] Postphone reclaim laundry to write at high water marks

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Message-ID: <46CB5C89.2070807@redhat.com>
Date:	Tue, 21 Aug 2007 17:43:37 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Christoph Lameter <clameter@....com>
CC:	Peter Zijlstra <peterz@...radead.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC 0/7] Postphone reclaim laundry to write at high water marks

Christoph Lameter wrote:

> I want general improvements to reclaim to address the issues that you see 
> and other issues related to reclaim instead of the strange code that makes 
> PF_MEMALLOC allocs compete for allocations from a single slab and putting 
> logic into the kernel to decide which allocs to fail. We can reclaim after 
> all. Its just a matter of finding the right way to do this. 

The simplest way of achieving that would be to allow
recursion of the page reclaim code, under the condition
that the second level call can only reclaim clean pages,
while the "outer" call does what the VM does today.

-- 
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