Date: Sun, 11 Jul 2004 16:43:07 -0400 (EDT) From: Daniel Eischen <eischen@vigrid.com> To: Bruce M Simpson <bms@spc.org> Cc: freebsd-current@freebsd.org Subject: Re: CDRW causes Thinkpad T41 to panic Message-ID: <Pine.GSO.4.10.10407111631030.17229-100000@pcnet5.pcnet.com> In-Reply-To: <20040711183702.GB769@empiric.dek.spc.org>
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On Sun, 11 Jul 2004, Bruce M Simpson wrote: > On Wed, May 26, 2004 at 05:21:14PM -1000, Kent Hauser wrote: > > ad0: 35293MB <HTS548040MAT00> [71707/16/63] at ata0-master UDMA100 > > ata1-slave: FAILURE - ATAPI_IDENTIFY no interrupt > > ata1-slave: FAILURE - ATAPI_IDENTIFY no interrupt > > acd0: CDRW <UJDA755zDVD/CDRW> at ata1-master UDMA33 > > Memory modified after free 0xc44d8a00(508) val=1ff01ff @ 0xc44d8a00 > > Again, this looks VERY, VERY similar to the behaviour which I observed > and documented on two separate IBM T41 systems this week. Same here. If you set request->retries to 1 instead of 2 in src/sys/dev/ata/ata/foo it seems to work. I think only one of the retries needs to change, but I forget which one it is. I believe there is a problem in allocation/deallocation in the retry. Something is getting deallocated but still being referenced. I thought it was the request (ata_alloc_request()), but after debugging it a bit, I think I figured eliminated that as a possibility. I stopped there when I ran out of time. Has anyone reported this problem to Soren? I don't think he reads -current any longer (too much spam). -- Dan Eischen
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