Messages in this thread | | | Date | Mon, 3 Nov 2014 11:10:39 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH 2/2] blk-mq: allow direct dispatch to a driver specific workqueue |
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On Mon, Nov 03, 2014 at 04:40:47PM +0800, Ming Lei wrote: > The above two aren't enough because the big problem is that > drivers need a per-request work structure instead of 'hctx->run_work', > otherwise there are at most NR_CPUS concurrent submissions. > > So the per-request work structure should be exposed to blk-mq > too for the kind of usage, such as .blk_mq_req_work(req) callback > in case of BLK_MQ_F_WORKQUEUE.
Hmm. Maybe a better option is to just add a flag to never defer ->queue_rq to a workqueue and let drivers handle the it?
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