On Tue, Apr 12, 2011 at 06:49:53PM +0200, Jens Axboe wrote: > I realize that, in fact it's already safe as long as you pass in 'true' > for __blk_run_queue(). Before I had rewritten it to move the running > out, so that makes the trick a little difficult. This afternoon I also > tested it and saw no noticable difference, but I'll probably just do it > anyway as it makes sense. We still need the lock for __elv_add_request, so we'll need to keep the logic anyway. But splitting out the just queue to kblockd case from __blk_run_queue and giving the latter a sane prototype still sounds like a good idea to me. Btw, now that we don't call the request_fn directly any more and thus can't block, can the unplugging be moved into the preempt notifiers? -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
