Messages in this thread | | | Date | Thu, 10 Jul 2014 15:52:49 +0200 | From | Jens Axboe <> | Subject | Re: scsi-mq V2 |
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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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