On Thu, Jun 30 2016 at 6:52pm -0400, Mike Snitzer <snitzer@xxxxxxxxxx> wrote: > Also, just so you're aware, I've staged bio-based dm-multipath support > for the 4.8 merge window. Please see either the 'for-next' or 'dm-4.8' > branch in linux-dm.git: > https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/log/?h=for-next > https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/log/?h=dm-4.8 > > I'd welcome you testing if bio-based dm-multipath performs better for > you than blk-mq request-based dm-multipath. Both modes (using the 4.8 > staged code) can be easily selected on a per DM multipath device table > by adding either: queue_mode=bio or queue_mode=mq > > (made possible with this commit: > https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=dm-4.8&id=e83068a5faafb8ca65d3b58bd1e1e3959ce1ddce > ) Sorry, no = should be used. you need either: "queue_mode bio" or "queue_mode mq" Added to the features section of the "multipath" ctr input. AFAIK, once the above commit lands upstream Ben will be adding some multipath-tools code to make configuring queue_mode easy (but I think multipath.conf may allow you to extend the features passed on a per-device basis already.. but I'd have to look). -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
