Re: scsi-mq V2

[Jens Axboe]

On 2014-07-10 15:50, Christoph Hellwig wrote:
> On Thu, Jul 10, 2014 at 09:36:09AM -0400, Benjamin LaHaise wrote:
> > There is one possible concern that could be exacerbated by other changes in
> > the system: if the application is running close to the bare minimum number
> > of requests allocated in io_setup(), the per cpu reference counters will
> > have a hard time batching things.  It might be worth testing with an
> > increased number of requests being allocated if this is the case.
>
> Well, Robert said reverting the two aio commits didn't help.  Either he
> didn't manage to boot into the right kernel, or we need to look
> elsewhere for the culprit.

Rob, let me know what scsi_debug setup you use, and I can try and 
reproduce it here as well.

--
Jens Axboe

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