From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o8NIveZ6142278 for ; Thu, 23 Sep 2010 13:57:40 -0500 Subject: Re: [PATCH] xfs: force background CIL push under sustained load From: Alex Elder In-Reply-To: <1285208863-31489-1-git-send-email-david@fromorbit.com> References: <1285208863-31489-1-git-send-email-david@fromorbit.com> Date: Thu, 23 Sep 2010 13:58:32 -0500 Message-ID: <1285268312.1973.114.camel@doink> Mime-Version: 1.0 Reply-To: aelder@sgi.com 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 Thu, 2010-09-23 at 12:27 +1000, Dave Chinner wrote: > From: Dave Chinner > > I have been seeing relatively frequent pauses in transaction throughput up to > 30s long under heavy parallel workloads. The only thing that seemed strange > about them was that the xfsaild was active during the pauses, but making no > progress. It was running exactly 20 times a second (on the 50ms no-progress > backoff), and the number of pushbuf events was constant across this time as > well. IOWs, the xfsaild appeared to be stuck on buffers that it could not push > out. . . . If you like I can take this patch directly (i.e., not wait for you to send a separate pull request). It fixes a real bug but since delayed logging still an experimental feature I am not inclined to send it to Linus at this point in the cycle. Let me know if you disagree. -Alex _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs