From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Richter Subject: Re: 100% repeatable way to send firewire out to lunch permanently on 2.6.8.1 Date: Sun, 24 Oct 2004 20:12:56 +0200 Sender: linux-scsi-owner@vger.kernel.org Message-ID: References: <200410241930.47104.chrivers@iversen-net.dk> Mime-Version: 1.0 (Generated by Pantomime 1.2.0) Content-Type: text/plain; charset="us-ascii"; format="flowed" Return-path: Received: from einhorn.in-berlin.de ([192.109.42.8]:18374 "EHLO einhorn.in-berlin.de") by vger.kernel.org with ESMTP id S261573AbUJXSMj (ORCPT ); Sun, 24 Oct 2004 14:12:39 -0400 In-Reply-To: <200410241930.47104.chrivers@iversen-net.dk> List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Cc: linux1394-devel@lists.sourceforge.net Christian Iversen wrote to linux1394-devel: > On Sunday 24 October 2004 19:22, Dmitry Torokhov wrote: >> On Sunday 24 October 2004 10:22 am, James Bottomley wrote: >>> The trace doesn't show any error handler activity at all. Are there no >>> messages in the log about offlining the device? If not, it sounds like >>> there's a problem somewhere in the firewire system. >> >> The thing is that the hang is happening only with CD/DVD devices (sr_mod) >> and not with hard drives (sd_mod) and as far as I can tell SBP2 does not >> differentiate betweeh an HD and a CD so I think there is something going >> on in sr_mod code. > > I can't see the start of the thread, but I have a very similar problem with > external CD-ROMs in usb-2.0 cases. Whenever I unplug them, they kill the > entire system (usb subsystem at first, then the whole kernel locks up). ... > This is tested on 3 different controllers, 2 different motherboards and 3 > different kernels. 2.6.7-2.6.9 all have this problem. 2.6.5-rc3 works like > a charm, and I haven't tested 2.6.6. I have 2 different SBP-2 CD-RW drives, 3 different SBP-2 harddrives, and use an USB memory stick occasionally. After the last kernel update (from 2.6.6-rc3 to 2.6.8.1) I noticed problems with device removals concerning /dev/scd? for the first time. I did not use the drives very extensively under the former kernel so I am not sure whether that worked fine. One thing is however certain: There is no hassle with sd devices. There were some more reports about the CD/DVD removal problems with recent 2.6 kernels on linux1394-user/-devel, but nothing similar about harddisks. -- Stefan Richter -=====-=-=-- =-=- ==--- http://arcgraph.de/sr/