From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id 8DA636B004A for ; Fri, 22 Jul 2011 08:57:26 -0400 (EDT) Subject: Re: [PATCH 8/8] mm: vmscan: Do not writeback filesystem pages from kswapd From: Peter Zijlstra In-Reply-To: <1311265730-5324-9-git-send-email-mgorman@suse.de> References: <1311265730-5324-1-git-send-email-mgorman@suse.de> <1311265730-5324-9-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Date: Fri, 22 Jul 2011 14:57:12 +0200 Message-ID: <1311339432.27400.36.camel@twins> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Linux-MM , LKML , XFS , Dave Chinner , Christoph Hellwig , Johannes Weiner , Wu Fengguang , Jan Kara , Rik van Riel , Minchan Kim On Thu, 2011-07-21 at 17:28 +0100, Mel Gorman wrote: > Assuming that flusher threads will always write back dirty pages promptly > then it is always faster for reclaimers to wait for flushers. This patch > prevents kswapd writing back any filesystem pages.=20 That is a somewhat sort changelog for such a big assumption ;-) I think it can use a few extra words to explain the need to clean pages from @zone vs writeback picks whatever fits best on disk and how that works out wrt the assumption. What requirements does this place on writeback and how does it meet them. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org