Hi, On Wednesday 30 January 2008, Kiyoshi Ueda wrote: > Hi Bart, > > On Tue, 29 Jan 2008 14:22:53 -0800, Roland Dreier wrote: > > Hi, I saw the same BUG from ide-cd on one of my systems. I applied > > the debugging patch to replace the BUG with blk_dump_rq_flags(), and I > > got the output below (full boot log and .config attached to this > > email). > > > > Please let me know if there's anything else that would help debug the > > problem. > > Thank you for the information, Roland. > > > > [ 4.072271] Uniform CD-ROM driver Revision: 3.20 > > [ 4.098236] ide-cd: rq still having bio: dev hda: type=2, flags=114c8 > > [ 4.100269] > > [ 4.100269] sector 1949759, nr/cnr 0/0 > > [ 4.100269] bio ffff8102418cc600, biotail ffff8102418cc600, buffer > > 0000000000000000, d8 > > [ 4.100269] cdb: 12 00 00 00 fe 00 00 00 00 00 00 00 00 00 00 00 > > [ 4.101005] ide-cd: rq still having bio: dev hda: type=2, flags=114c8 > > [ 4.104269] > > [ 4.104269] sector 1949759, nr/cnr 0/0 > > [ 4.104269] bio ffff8102418cc600, biotail ffff8102418cc600, buffer > > 0000000000000000, d2 > > [ 4.104269] cdb: 12 00 00 00 fe 00 00 00 00 00 00 00 00 00 00 00 > > [ 4.109203] ide-cd: rq still having bio: dev hda: type=2, flags=114c8 > > [ 4.112270] > > [ 4.112270] sector 1949759, nr/cnr 0/0 > > [ 4.112270] bio ffff8102418cc600, biotail ffff8102418cc600, buffer > > 0000000000000000, d8 > > [ 4.112270] cdb: 12 01 00 00 fe 00 00 00 00 00 00 00 00 00 00 00 > > [ 4.112945] ide-cd: rq still having bio: dev hda: type=2, flags=114c8 > > [ 4.116270] > > [ 4.116270] sector 1949759, nr/cnr 0/0 > > [ 4.116270] bio ffff8102418cc600, biotail ffff8102418cc600, buffer > > 0000000000000000, d2 > > [ 4.116270] cdb: 12 01 00 00 fe 00 00 00 00 00 00 00 00 00 00 00 > > Bart, > This means that the rq still has a bio even after DRQ_STAT is cleared. > The original ide-cd code was calling only end_that_request_last() there. > So I thought that the rq should have no bio when DRQ_STAT is cleared, > otherwise the bio leaks. > > Was my understanding wrong and is that correct behavior in ide-cd?
Added Borislav to cc:. PS I'm extremely busy with "real-life" (unfortunately IDE hacking is not my paid job) and the friday is the earliest date on which I would be able to look in detail into this problem and other outstanding IDE stuff, sorry. Thanks, Bart -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
