Messages in this thread | | | From | Roy Sigurd Karlsbakk <> | Subject | Re: BUG in 2.5.50 | Date | Mon, 9 Dec 2002 12:36:06 +0100 |
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> Perhaps this might help with debugging; > > He has CONFIG_BLK_DEV_IDE_TCQ enabled and his IBM supports it, > > when he gets to do_rw_disk(); > > We know its a READ request > if (rq_data_dir(rq) == READ) { > if (blk_rq_tagged(rq)) > return hwif->ide_dma_queued_read(drive); > > ... the request isn't tagged so we drop down here... > > if (drive->using_dma && !hwif->ide_dma_read(drive)) > return ide_started; > > int __ide_dma_read (ide_drive_t *drive) > ... > if (HWGROUP(drive)->handler != NULL) > BUG(); > > and ->handler = ? > > Is this reproducible? If so without CONFIG_PREEMPT?
I found it easily reproducable - I just did the same old 'make modules_install' from the kernel dir, and BUG. Witout CONFIG_PREEMPT, however, I was not, and I tried to stress it quite a bit
roy -- Roy Sigurd Karlsbakk, Datavaktmester ProntoTV AS - http://www.pronto.tv/ Tel: +47 9801 3356
Computers are like air conditioners. They stop working when you open Windows.
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