Messages in this thread | | | Date | Tue, 19 Aug 2014 21:41:01 +0530 | Subject | Re: [PATCH 13/14] scsi: add support for a blk-mq based I/O path. | From | Kashyap Desai <> |
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On Tue, Aug 19, 2014 at 9:36 PM, Christoph Hellwig <hch@lst.de> wrote: > On Tue, Aug 19, 2014 at 03:51:42AM +0530, Kashyap Desai wrote: >> I read this comment and find that very few drivers are using this >> cmd_list. I think if we remove this cmd_list, performance will scale as I >> am seeing major contention in this lock. >> Just thought to ping you to see if this is known limitation for now or any >> plan to change this lock in near future ? > > Removing the lock entirely and pushing the list into the two drivers > using it is on my TODO list. Bart actually suggested keeping the code in the > SCSI core and having a flag to enabled. Given that I'm too busy to get my full > version done in time, it might be a good idea if someone picks up Barts > idea. Can you send me a patch to add a enable_cmd_list flag to the host > template and only enable it for aacraid and dpt_i2o? >
Sure. I will work on relevant code change and will post patch for review.
-- Device Driver Developer @ Avagotech Kashyap D. Desai Note - my new email address kashyap.desai@avagotech.com
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