Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756072Ab0HAIrN (ORCPT ); Sun, 1 Aug 2010 04:47:13 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:40249 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752125Ab0HAIrL (ORCPT ); Sun, 1 Aug 2010 04:47:11 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: Mel Gorman Subject: Re: Why PAGEOUT_IO_SYNC stalls for a long time Cc: kosaki.motohiro@jp.fujitsu.com, Wu Fengguang , Andrew Morton , stable@kernel.org, Rik van Riel , Christoph Hellwig , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , Dave Chinner , Chris Mason , Nick Piggin , Johannes Weiner , KAMEZAWA Hiroyuki , Andrea Arcangeli , Minchan Kim , Andreas Mohr , Bill Davidsen , Ben Gamari In-Reply-To: <20100730103018.GE3571@csn.ul.ie> References: <20100730115222.4AD8.A69D9226@jp.fujitsu.com> <20100730103018.GE3571@csn.ul.ie> Message-Id: <20100801174229.4B08.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Sun, 1 Aug 2010 17:47:08 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 657 Lines: 17 > > side note: page lock contention is very common case. > > > > For case (8), I don't think sleeping is right way. get_page() is used in really various place of > > our kernel. so we can't assume it's only temporary reference count increasing. > > In what case is a munlocked pages reference count permanently increased and > why is this not a memory leak? V4L, audio, GEM and/or other multimedia driver? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/