Re: blk-mq: don't dispatch request in blk_mq_request_direct_issue if queue is busy

On Wed, 2018-01-17 at 23:36 -0500, Mike Snitzer wrote: > On Wed, Jan 17 2018 at 11:06pm -0500, > Ming Lei wrote: > > > If we run into blk_mq_request_direct_issue(), when queue is busy, > > we > > don't want to dispatch this request into hctx->dispatch_list, and > > what we

Re: blk-mq: don't dispatch request in blk_mq_request_direct_issue if queue is busy

On Wed, Jan 17 2018 at 11:06pm -0500, Ming Lei wrote: > If we run into blk_mq_request_direct_issue(), when queue is busy, we > don't want to dispatch this request into hctx->dispatch_list, and > what we need to do is to return the queue busy info to caller, so > that caller