On Wed, 2017-02-22 at 17:07 +0100, Hannes Reinecke wrote: > this is a resend of a small patchset for cleaning up SCSI EH. > Primary goal is to make asynchronous aborts mandatory; there hasn't > been a single report so far where asynchronous abort won't work, so > the 'no_async_abort' flag has never been used and will be removed > with this patchset. > Additionally there's a cleanup for handle failed EH commands, and > to detect retries of failed commands.
An additional comment: I don't think it is safe to execute a host reset while any asynchronous aborts are ongoing. I think the SCSI EH will get really confused if after a host reset has been performed a response is received from an asynchronous abort that was issued before the host reset started. Although a SCSI target must not send a LU RESET response before all previously submitted SCSI commands and TMFs have finished, what prevents in e.g. a multipath topology that an abort response and a LU RESET response are received out of order? Thanks, Bart.
