From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264450AbUBRLVJ (ORCPT ); Wed, 18 Feb 2004 06:21:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264894AbUBRLVJ (ORCPT ); Wed, 18 Feb 2004 06:21:09 -0500 Received: from absinthe.ifi.unizh.ch ([130.60.75.58]:57225 "EHLO diamond.madduck.net") by vger.kernel.org with ESMTP id S264450AbUBRLVE (ORCPT ); Wed, 18 Feb 2004 06:21:04 -0500 Date: Wed, 18 Feb 2004 12:20:53 +0100 From: martin f krafft To: linux kernel mailing list Subject: the crux with DMA Message-ID: <20040218112052.GA8001@diamond.madduck.net> Mail-Followup-To: linux kernel mailing list Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="OgqxwSJOaUobr8KG" Content-Disposition: inline X-OS: Debian GNU/Linux testing/unstable kernel 2.6.2-diamond i686 X-Mailer: Mutt 1.5.5.1+cvs20040105i (2003-11-05) X-Motto: Keep the good times rollin' X-Subliminal-Message: debian/rules! User-Agent: Mutt/1.5.5.1+cvs20040105i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --OgqxwSJOaUobr8KG Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi folks, I have two machines with 7200 UPM ATA drives. Both are running the 2.6.2 kernel. One has an AMD-768 IDE chipset and reiserfs, the other a combination of VT82C586 and Promise 20269 with ext3. Both machines seem to have a problem with DMA, which wasn't a problem with the 2.4 kernel series. The symptoms are simple: if I have DMA turned on, sustained high disk usage will cause complete freezes in both machines. Sometimes, one gets a couple of kernel oops before the eventual lockup, which is usually related to journaling code, but it's never really the same. With a 2.4 kernel, these lockups did not happen. With DMA turned off, I have also not been able to reproduce the crashes. I know that neither, reiserfs nor ext3, are high-performance, and a switch to xfs has long been on my TODO list, but I first want to get this problem worked out -- I can't mirror the disk otherwise without crashing 40 times, so I can't create new filesystems. Any advice is appreciated! --=20 martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck =20 invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! =20 "science without religion is lame, religion without science is blind." -- albert einstein --OgqxwSJOaUobr8KG Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFAM0qUIgvIgzMMSnURAvKXAJ9yauUO3geKt13BaWPd35kgG4H79gCeLLMz a5yOzUWSdrJ9seHdJElZ76o= =faOh -----END PGP SIGNATURE----- --OgqxwSJOaUobr8KG--