On Mon, Jul 31, 2023 at 06:28:01PM +0200, Hannes Reinecke wrote: > The flush machinery is sending flushes before and/or after the original > request (preflush/postflush). For blocked transports (ie during FC RSCN > handling) the transport will error out commands depending on the FAILFAST > setting. If FAILFAST is set the SCSI layer gets an STS_TRANSPORT error > (causing the I/O to be retried), but STS_ERROR if not set (causing I/O to > failed). > > So if the FAILFAST setting is _not_ aligned between flush_rq and the > original we'll get an error on the flush rq and a retry on the original rq, > causing the entire command to fail. > > I guess we need to align them. But you can't, because multiple pre/postflushes are coalesced into a single outstanding flush request. They can and will not match quite commonly.
