On Mon, Nov 3, 2014 at 6:10 PM, Christoph Hellwig <hch@xxxxxx> wrote: > 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? That should work, but might lose potential merge benefit of defer. Thanks, -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
