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Date: Mon, 1 Dec 2008 07:40:41 -0600 (CST)
From: Christoph Lameter <cl@linux-foundation.org>
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To: Rik van Riel <riel@redhat.com>
cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       akpm@linux-foundation.org, linux-mm@kvack.org,
       linux-kernel@vger.kernel.org, mel@csn.ul.ie
Subject: Re: [PATCH] vmscan: bail out of page reclaim after swap_cluster_max
 pages
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On Sat, 29 Nov 2008, Rik van Riel wrote:

> When using mmap or memory hogs writing to swap, applications
> will not be throttled by the "too many dirty pages" logic,
> but may instead end up being throttled in the direct reclaim
> path instead.

The too many dirty pages logic will throttle applications dirtying
mmapped pages these days.