Re: 2.4.23pre6aa3 scsi oops

From: Jamie Clark
Date: Tue Nov 04 2003 - 06:56:55 EST

I made the quick fix (disabling rq_mergeable) and started the load test.
Will let it run for a week or so.

Thanks for the help!

FYI an observation from my last test: the read latency seems to be much
improved and more consistent under this kernel (2.4.23pre6aa3, before
the oops and before this fix). The maximum latency seemed steady over
the whole test without any of the longish pauses that showed up under
2.4.19. Quite a difference.

Andrea Arcangeli wrote:

On Tue, Nov 04, 2003 at 10:49:29AM +0800, Jamie Clark wrote:


Consistent oops with 2.4.23pre6aa3 after 3-4 hours running bonnie on ext3 fs through qla2300 HBA. (w SMP, HIGHMEM) The test machine was completely wedged so I ended up transcribing the oops from the vga console. No typos I think.

I need to release an update that has a chance to fix it. Jens identified
problem in his last_merge scsi patch so I will back it out.

you can try to backout it by yourself in the meantime, it's called
\*elevator-merge-fast-path\* . or you can disable it with this patch:

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