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 SMTP id 5025D6B02A4 for ; Thu, 5 Aug 2010 02:11:08 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o756BF6V011827 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Thu, 5 Aug 2010 15:11:16 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id A6CA645DE60 for ; Thu, 5 Aug 2010 15:11:15 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 63EF445DE4D for ; Thu, 5 Aug 2010 15:11:15 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 079F8E38006 for ; Thu, 5 Aug 2010 15:11:15 +0900 (JST) Received: from m106.s.css.fujitsu.com (m106.s.css.fujitsu.com [10.249.87.106]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 2118AE38001 for ; Thu, 5 Aug 2010 15:11:14 +0900 (JST) From: KOSAKI Motohiro Subject: [RFC][PATCH 0/7] low latency synchrounous lumpy reclaim Message-Id: <20100805150624.31B7.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Thu, 5 Aug 2010 15:11:13 +0900 (JST) Sender: owner-linux-mm@kvack.org To: LKML , linux-mm , Andrew Morton , Johannes Weiner , Mel Gorman , Wu Fengguang , Minchan Kim , Rik van Riel Cc: kosaki.motohiro@jp.fujitsu.com List-ID: If slow usb storage is connected and run plenty io operation, lumpy reclaim often stall in shrink_inactive_list(). This patch series try to solve this issue. At least, This works fine on my desktop and usb stick environment :-) This patch is still RFC. comment, reviewing and testing are welcome! Wu Fengguang (1): vmscan: raise the bar to PAGEOUT_IO_SYNC stalls KOSAKI Motohiro (6): vmscan: synchronous lumpy reclaim don't call congestion_wait() vmscan: synchrounous lumpy reclaim use lock_page() instead trylock_page() vmscan: narrowing synchrounous lumply reclaim condition vmscan: kill dead code in shrink_inactive_list() vmscan: remove PF_SWAPWRITE from __zone_reclaim() vmscan: isolated_lru_pages() stop neighbor search if neighbor can't be isolated mm/vmscan.c | 211 ++++++++++++++++++++++++++++++++++++++-------------------- 1 files changed, 138 insertions(+), 73 deletions(-) -- 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/ . Don't email: email@kvack.org