Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756598AbXI1SxS (ORCPT ); Fri, 28 Sep 2007 14:53:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752425AbXI1SxG (ORCPT ); Fri, 28 Sep 2007 14:53:06 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:47470 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752290AbXI1SxD (ORCPT ); Fri, 28 Sep 2007 14:53:03 -0400 Subject: Re: A unresponsive file system can hang all I/O in the system on linux-2.6.23-rc6 (dirty_thresh problem?) From: Peter Zijlstra To: Andrew Morton Cc: Trond Myklebust , Chakri n , linux-pm , lkml , nfs@lists.sourceforge.net In-Reply-To: <20070928114930.2c201324.akpm@linux-foundation.org> References: <92cbf19b0709272332s25684643odaade0e98cb3a1f4@mail.gmail.com> <20070927235034.ae7bd73d.akpm@linux-foundation.org> <1190998853.6702.17.camel@heimdal.trondhjem.org> <20070928114930.2c201324.akpm@linux-foundation.org> Content-Type: text/plain Date: Fri, 28 Sep 2007 20:48:59 +0200 Message-Id: <1191005339.18147.89.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.11.92 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 607 Lines: 15 On Fri, 2007-09-28 at 11:49 -0700, Andrew Morton wrote: > Do you know where the stalls are occurring? throttle_vm_writeout(), or via > direct calls to congestion_wait() from page_alloc.c and vmscan.c? (running > sysrq-w five or ten times will probably be enough to determine this) would it make sense to instrument congestion_wait() callsites with vmstats? - 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/