From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q8RClwco094718 for ; Thu, 27 Sep 2012 07:47:58 -0500 Received: from josefsipek.net (josefsipek.net [64.9.206.49]) by cuda.sgi.com with ESMTP id syAgvXlLnOdw4QE8 for ; Thu, 27 Sep 2012 05:49:17 -0700 (PDT) Date: Thu, 27 Sep 2012 08:49:15 -0400 From: "Josef 'Jeff' Sipek" Subject: Re: task blocked for more than 120 seconds Message-ID: <20120927124914.GD28852@poseidon> References: <20120418151139.GC4652@poseidon.cudanet.local> <20120418234821.GR6734@dastard> <20120419154601.GB8230@poseidon.cudanet.local> <20120419225603.GA9541@dastard> <20120420135820.GB9189@poseidon.cudanet.local> <20120421002932.GG9541@dastard> <20120423202441.GD21260@poseidon.cudanet.local> <20120423232759.GO9541@dastard> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20120423232759.GO9541@dastard> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com On Tue, Apr 24, 2012 at 09:27:59AM +1000, Dave Chinner wrote: ... > So, yes, your hangs are definitely due to inode buffer RMW cycles > when trying to flush dirty inodes from the cache. I have a few > ideas on how to fix this - but I'm not sure whether a current TOT > solution will be easily back-portable. The simplest solution is a > readahead based solution - AIL pushing is async, and will cycle back > to inodes that it failed to flush the first time past, so triggering > readahead on the first pass might work just fine. Have you had time to look at this? (We got bitten by this again and I really don't want to go back to ext4.) Is there anything I can help with? Jeff. -- Evolution, n.: A hypothetical process whereby infinitely improbable events occur with alarming frequency, order arises from chaos, and no one is given credit. _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs