James Bottomley wrote: > On Fri, 2007-04-27 at 16:47 -0500, Bob Tracy wrote: > > I previously reported an ISA DMA issue for the 2.6.12 kernel. The issue > > persists through at least 2.6.18. SCSI controller is an Adaptec > > AHA-1542B (ISA). > > > > The action "mount -t iso9660 /dev/scd0 /mnt/cdrom -r" > > > > produces > > > > (cdrom detection messages as various modules autoload, then...) > > Knowing what these messages are is would be helpful; it tells me what > point in the initialisation it got to. Sorry about that... I'm running the DSL-N distribution (based on Knoppix), and having to transcribe the log messages by hand from the console, i.e., there's no logfile to cut-and-paste from :-(. I don't have access to the machine except on weekdays, but I'll repeat the crash first thing Monday morning and copy everything that's there... > I'm interested. > > This is clearly a use_sg==1 path that has failed to bounce the buffer > for some reason ... and I was contemplating eliminating the GFP_DMA from > our sr driver because I thought the block bouncing had it covered. > > It might also be helpful to apply this patch. It should give a stack > trace of the problem command and not immediately panic the box. I'll throw together a 2.6.21 kernel with this patch and give it a try. Again, it will be at least Monday before you hear back from me on this. Thanks! -- ----------------------------------------------------------------------- Bob Tracy WTO + WIPO = DMCA? http://www.anti-dmca.org rct@xxxxxxxx ----------------------------------------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
