Re: BUG in 2.5.50

Zwane Mwaikambo (zwane@holomorphy.com)
Mon, 9 Dec 2002 05:57:40 -0500 (EST)


Added Jens to CC to verify any incorrect information i may or may not put
down.

On Mon, 9 Dec 2002, Roy Sigurd Karlsbakk wrote:

> installed 2.5.50 and got an OOPS after a short while. .
> config is attached as tonjeconfig
> /var/log/messages including dmesg and oops is attached as tonje_messages

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?

Cheers,
Zwane

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