From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Bainbridge Subject: 2.6.13.2 + reiser4 system hangs and poor performance Date: Tue, 11 Oct 2005 17:22:34 +0100 Message-ID: <623652d50510110922j319d5325i@mail.gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com Content-Disposition: inline List-Id: Content-Type: text/plain; charset="us-ascii" To: reiserfs-list@namesys.com Hi, Since updating to 2.6.13.2 last week I've had a couple of system hangs which required a poweroff. I can now reproduce a bad performance + can't reboot situation. I'm using gentoo with a reiser4 root partition. I've only tested this on my own system, so if another 2.6.13.2 + reiser4 gentoo user could try this that would be useful. Under 2.6.12.5, do 'time emerge =3Dsun-jdk-1.5.0.05'. Total time is 2 minutes 10 seconds. Under 2.6.13.2, do 'time emerge =3Dsun-jdk-1.5.0.05'. Total time is 6 minutes 51 seconds. Will appear to hang at the "gzipping man page: unpack200.1" but eventually finishes. After this, attempting to shutdown will result in a system hang. Like I said, this happens every time I emerge that package. Probably it causes some pattern of disk I/O that triggers a bug in reiser4. During the hang time, the pdflush process is taking up most of the cpu, and there is almost no disk i/o. I tested with a non-preempt kernel, and get the same. With 2.6.12.5, everything is okay.