From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: dm-multipath low performance with blk-mq Date: Tue, 26 Jan 2016 21:09:32 -0500 Message-ID: <20160127020932.GA26919@redhat.com> References: <569E11EA.8000305@dev.mellanox.co.il> <20160119224512.GA10515@redhat.com> <20160125214016.GA10060@redhat.com> <20160126160324.GA24665@redhat.com> <20160126164437.GB15979@infradead.org> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20160126164437.GB15979@infradead.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Christoph Hellwig , Sagi Grimberg Cc: "keith.busch@intel.com" , Bart Van Assche , dm-devel@redhat.com, "linux-nvme@lists.infradead.org" List-Id: dm-devel.ids On Tue, Jan 26 2016 at 11:44am -0500, Christoph Hellwig wrote: > On Tue, Jan 26, 2016 at 11:03:24AM -0500, Mike Snitzer wrote: > > Christoph, any chance you could rebase your 'nvme-loop.2' on v4.5-rc1? > > Don't think I have time at the moment, sorry.. No problem, I pulled the latest DM changes ontop of 'nvme-loop.2', see: http://git.kernel.org/cgit/linux/kernel/git/snitzer/linux.git/log/?h=devel I was able to use nvme-loop like was documented here: http://git.infradead.org/users/hch/block.git/commit/47d8d5b1db270463b5bd7b6a68cd89bd8762840d But I'm not too sure how Sagi used the resulting nvme device with multipath.. maybe he just manually pushed down a DM multipath table? And only used the single /dev/nvme0n1 device? Sagi?