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 qAN5bHMT030321 for ; Thu, 22 Nov 2012 23:37:17 -0600 Received: from ipmail06.adl2.internode.on.net (ipmail06.adl2.internode.on.net [150.101.137.129]) by cuda.sgi.com with ESMTP id UqJujsa3zasSs1eL for ; Thu, 22 Nov 2012 21:39:29 -0800 (PST) Date: Fri, 23 Nov 2012 16:39:13 +1100 From: Dave Chinner Subject: Re: high load and xfsaild in d Message-ID: <20121123053913.GD32450@dastard> References: <20121123025624.GC32450@dastard> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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: Keith Keller Cc: linux-xfs@oss.sgi.com On Thu, Nov 22, 2012 at 08:34:06PM -0800, Keith Keller wrote: > On 2012-11-23, Dave Chinner wrote: > > That's a side effect of a minimal set of bug fixes that were needed > > to avoid a load related log space hang. Those fixes disabled the > > aild idling logic so the aild acts as a watchdog, so they wake up > > every 50ms to check if there's anything to do. You'll find that > > 3.0.x stable kernels have the same behaviour. > > > > The aild idling logic was re-enabled in mainstream kernels after the > > root cause of the log space hangs was diagnosed and fixed, but I > > can't see it ever being re-enabled in a CentOS 6.3 kernel.... > > Thanks for the clarification, Dave. It sounds like I would need to > either wait for this fix to hit the CentOS release kernel, or compile my > own. Do whatever you want - you might be waiting a while for CentOS to fix it, though, because they don't fix user reported bugs. They just repackage whatever Red Hat releases as RHEL. TANSTAAFL. > Do you know why I might not see this behavior on a different CentOS 6.x > kernel? > > Linux xxxxxx 2.6.32-279.5.2.el6.x86_64 #1 SMP Fri Aug 24 01:07:11 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Because the log hang bug hadn't been fixed in that kernel. Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs