Re: [for-4.16 PATCH v6 2/3] blk-mq: improve DM's blk-mq IO merging via blk_insert_cloned_request feedback

On Wed, Jan 17, 2018 at 10:37:23PM -0500, Mike Snitzer wrote: > On Wed, Jan 17 2018 at 10:25pm -0500, > Ming Lei wrote: > > > Hi Mike, > > > > On Wed, Jan 17, 2018 at 11:25:57AM -0500, Mike Snitzer wrote: > > > From: Ming Lei > > > > > >

Re: [for-4.16 PATCH v6 2/3] blk-mq: improve DM's blk-mq IO merging via blk_insert_cloned_request feedback

On Wed, Jan 17 2018 at 10:25pm -0500, Ming Lei wrote: > Hi Mike, > > On Wed, Jan 17, 2018 at 11:25:57AM -0500, Mike Snitzer wrote: > > From: Ming Lei > > > > blk_insert_cloned_request() is called in the fast path of a dm-rq driver > > (e.g. blk-mq

Re: [for-4.16 PATCH v6 2/3] blk-mq: improve DM's blk-mq IO merging via blk_insert_cloned_request feedback

Hi Mike, On Wed, Jan 17, 2018 at 11:25:57AM -0500, Mike Snitzer wrote: > From: Ming Lei > > blk_insert_cloned_request() is called in the fast path of a dm-rq driver > (e.g. blk-mq request-based DM mpath). blk_insert_cloned_request() uses > blk_mq_request_bypass_insert() to

[for-4.16 PATCH v6 2/3] blk-mq: improve DM's blk-mq IO merging via blk_insert_cloned_request feedback

From: Ming Lei blk_insert_cloned_request() is called in the fast path of a dm-rq driver (e.g. blk-mq request-based DM mpath). blk_insert_cloned_request() uses blk_mq_request_bypass_insert() to directly append the request to the blk-mq hctx->dispatch_list of the underlying