ad WRITE_DMA timing out frequently

[Reid Linnemann]

>I've been using the patch Ian posted for a week or so now and have not
>had any of the serious problems I had before I applied the patch.  I
>have had two incidences of "TIMEOUT - WRITE_DMA" in the time I've been
>running with the patch, but they have not resulted in the "FAILURE -
>WRITE_DMA timed out" and associated fatal provider disconnection I
>experienced previously.  It may be completely unrelated, but since
>running with this patch, my system also hasn't experienced any of the
>occasional spontaneous reboots I would sometimes get before, and seems
>overall more robust.
>
>It would be great if this patch could be applied to -CURRENT and MFC5'd,
>too.

I'd like to say "me too". Since patching, I have had several "TIMEOUT
- WRITE_DMA" messages, usually 2-3 per day, but no failures. The system
has been running stable for about 8 days, and I do not notice any
filesystem inconsistency or performance degradation.