Re: BUG in 2.5.50

From: Zwane Mwaikambo (
Date: Mon Dec 09 2002 - 05:57:40 EST

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

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)

and ->handler = ?

Is this reproducible? If so without CONFIG_PREEMPT?


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