From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id p5K0sIcd095823 for ; Sun, 19 Jun 2011 19:54:18 -0500 Received: from mail.ud10.udmedia.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DCA96172B55D for ; Sun, 19 Jun 2011 17:54:17 -0700 (PDT) Received: from mail.ud10.udmedia.de (ud10.udmedia.de [194.117.254.50]) by cuda.sgi.com with ESMTP id mtBauPsOaB2tEGcB for ; Sun, 19 Jun 2011 17:54:17 -0700 (PDT) Date: Mon, 20 Jun 2011 02:54:15 +0200 From: Markus Trippelsdorf Subject: Re: long hangs when deleting large directories (3.0-rc3) Message-ID: <20110620005415.GA1730@x4.trippels.de> References: <20110618141950.GA1685@x4.trippels.de> <20110619222447.GI561@dastard> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20110619222447.GI561@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 2011.06.20 at 08:24 +1000, Dave Chinner wrote: > On Sat, Jun 18, 2011 at 04:19:50PM +0200, Markus Trippelsdorf wrote: > > Running the latest git kernel (3.0-rc3) my machine hangs for long > > periods (1-2 sec) whenever I delete a large directory recursively on my > > xfs partition. During the hang I cannot move the mouse pointer or use > > the keyboard (but the music keeps playing without stuttering). A quick > > way to reproduce is to "rm -fr" a kernel tree. > > So what is the system doing when it "hangs"? Is it CPU bound (e.g. > cpu scheduler issue)? Is the system running out of memory and > stalling everything in memory reclaim? What IO is occurring? It's totally idle otherwise; just a desktop with a single xterm. The machine has four cores (and also runs with "CONFIG_PREEMPT=y"), so I don't think it is CPU bound at all. It has 8GB of memory (and the "hangs" even occur after reboot when most of it is free). No other IO activity is occurring. > > This happens on a 4kb SATA hard drive: > > How does this appear to the OS? as a 512/512, 512/4k or 4k/4k > logical/physical sector size drive? It unfortunately appears as 512/512, but because I know it's a 4KB drive, I formated it with "-s size=4096". > > xfs_info /var > > meta-data=/dev/sda1 isize=256 agcount=4, agsize=12800000 blks > > = sectsz=4096 attr=2 > > data = bsize=4096 blocks=51200000, imaxpct=25 > > = sunit=0 swidth=0 blks > > naming =version 2 bsize=4096 ascii-ci=0 > > log =internal bsize=4096 blocks=25000, version=2 > > = sectsz=4096 sunit=1 blks, lazy-count=1 > > realtime =none extsz=4096 blocks=0, rtextents=0 > > > > /dev/sda1 on /var type xfs (rw,noatime,attr2,delaylog,logbsize=256k,noquota) > > Is your partition correctly sector aligned for however your drive > maps it's 4k sectors? Yes, it's a GPT partition that is aligned to 1MB. -- Markus _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs