[20:31] <mwpastore> has the original SQ block layer been completely removed in favor of blk-mq in modern kernels? 
[20:32] <mwpastore> dm_mod.use_blk_mq=0 (or =n) on the kernel command line doesn't seem to have any effect 
[20:35] <mwpastore> ah. I think this answers my question https://github.com/torvalds/linux/blob/4d856f72c10ecb060868ed10ff1b1453943fc6c8/drivers/scsi/scsi.c#L763-L765
[20:39] <mwpastore> there should probably be a backport of multipath-tools for bionic to go along with the 5. 3 hwe kernel
[20:41] <mwpastore> https://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=commit;h=a055a274a2633bd96a9341a8c85f5f1bdae2645d