From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart.VanAssche@wdc.com (Bart Van Assche) Date: Tue, 24 Jul 2018 14:25:41 +0000 Subject: data corruption with 'splt' workload to XFS on DM cache with its 3 underlying devices being on same NVMe device In-Reply-To: References: <20180723163357.GA29658@redhat.com> Message-ID: On Tue, 2018-07-24@08:00 +0200, Hannes Reinecke wrote: > So, have you tested that request-based multipathing works on a partition > _at all_? I'm not sure if partition mapping is done correctly here; we > never remap the start of the request (nor bio, come to speak of it), so > it looks as if we would be doing the wrong things here. > > Have you checked that partition remapping is done correctly? I think generic_make_request() takes care of partition remapping by calling blk_partition_remap(). generic_make_request() is called by submit_bio(). Is that sufficient to cover all dm drivers? Bart.