From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Dushan Tcholich" Subject: Re: [BUG] reiser4-for-2.6.22-2 Large stalls when using atime mount option Date: Thu, 8 Nov 2007 09:52:13 +0100 Message-ID: References: <5c7c368b0711071331q496ba3b5yf2383f2a0578b3e8@mail.gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=EDXlYnk+pWvHCZYV1w8uDe5/A0RnmS33rR18CdmRP4Y=; b=bCDWjx84RLew3fFGl4VGQEBhMDKKDcJyduSME2qVzHronz0hgSpQKZsagxXDQ4gMUNZoLl6n7LBY2mIjbj0dXxp/g/3yLRsAKt4QsMEkLbxf2uYqDd/eehMR9m4PQ3h674yjNHpyxxf/H5+2W5EV4Ngha7LV4gqhoLocoX69pW0= In-Reply-To: <5c7c368b0711071331q496ba3b5yf2383f2a0578b3e8@mail.gmail.com> Content-Disposition: inline Sender: reiserfs-devel-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii" To: Edward Shishkin Cc: reiserfs-devel@vger.kernel.org Hi On Nov 7, 2007 10:31 PM, Edward Shishkin wrote: > Hello. > > On 11/7/07, Dushan Tcholich wrote: > > Kernel: Gentoo 2.6.22-r2 + reiser4-for-2.6.22-2.patch > > fstab: > > /dev/sda2 /boot ext2 noauto,noatime 1 2 > > /dev/sda5 / reiser4 0 0 > > /dev/sda3 none swap sw 0 0 > > /dev/sda6 /home ext3 noatime 0 0 > > > > reiser4 partition is with cryptocompress (lzo) default settings. > > > > I usually mount r4 with -noatime, but after some debbuging with some users > > on irc (rvalles), who have intermitent large stalls, we found that only > > difference between our setups was my -noatime flag in fstab. > > Plus rvalles doesn't use compression (isn't it?) He had stalls without compression, but now switched to compression and still has them. But I can't reproduce them with -noatime option. > > > I tried to mount / without -noatime, started gnome, and then in about same > > time evolution, firefox, played some mp3s, avis, did a kernel compile, > > emerge -uD world (compiled few packages), acessed some random fles in > > /usr/src/linux, started gnome disk usage analyser etc. and had no stalls at > > all. > > And then I tried to reboot. System stalled for 3min 25 sec (i was ready with > > a watch :)) before printing the first message, with heavy disk activity. > > Upon reboot I just changed line in fstab with nano to mount r4 with -noatime > > and rebooted agin. Now there were no stalls. > > To my inexperienced eyes it looks like lazy writes of atime are adding with that "reiser4 writes continuously to same sector" bug. > > Currently I am preparing a patch for this problem. > Not sure about its efficiency: we'll take a look.. Great > > Thanks, > Edward. > Dushan