Re: kernel BUG at drivers/block/ub.c:820!

[Martin Schwidefsky <schwidefsky@de.ibm.com>]

On Thu, 2008-04-03 at 17:15 +0300, Boaz Harrosh wrote:
> OK So first this confirms that for ages the ub.c driver was leaking
> BIO's
> on first connection. Just that it was never noticed before.
> 
> or that we have a BLOCK_PC at hand but before the 7d699baf patch
> we completed with - rq->hard_nr_sectors << 9 - where now
> blk_rq_bytes(rq)
> will return 218 which is less. Could you also put rq->hard_nr_sectors
> in the print above?
> 
> Did you mange to find what is that 218 bytes command. Put a WARN_ON(1)
> in ub_request_fn_1 for any command that has a blk_rq_bytes(rq) of 218
> so we'll see who issues these commands. And what is the real bug.

I've added a WARN_ON(blk_rq_bytes(rq) == 218) right before the
ub_submit_scsi in ub_request_fn_1. ub_end_rq still reports the odd size
but I get nothing from ub_request_fn_1. Interesting.

-- 
blue skies,
  Martin.

"Reality continues to ruin my life." - Calvin.