RE: scsi-mq V2

From: Elliott, Robert (Server Storage)
Date: Fri Jul 11 2014 - 02:03:22 EST

> -----Original Message-----
> From: linux-scsi-owner@xxxxxxxxxxxxxxx [mailto:linux-scsi-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Elliott, Robert (Server Storage)
> I added some prints in aio_setup_ring and ioctx_alloc and
> rebooted. This time it took much longer to hit the problem. It
> survived dozens of ^Cs. Running a few minutes, though, IOPS
> eventually dropped. So, sometimes it happens immediately,
> sometimes it takes time to develop.
> I will rerun bisect-1 -2 and -3 for longer times to increase
> confidence that they didn't just appear good.

Allowing longer run times before declaring success, the problem
does appear in all of the bisect trees. I just let fio
continue to run for many minutes - no ^Cs necessary.

no-rebase: good for > 45 minutes (I will leave that running for
8 more hours)
bisect-1: bad
bisect-2: bad
bisect-3: bad
bisect-4: bad

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