[dm-devel] dm + blk-mq soft lockup complaint

[Mike Snitzer]

On Thu, Jan 15 2015 at  3:11am -0500,
Bart Van Assche <bart.vanassche at sandisk.com> wrote:

> On 01/14/15 20:00, Mike Snitzer wrote:
> > IB aside, I haven't been following along close enough on scsi-mq
> > developments, but does a regular iscsi initiator have support for
> > scsi-mq?  I'd like to validate scsi-mq devices with the dm-mpath
> > changes.
> 
> Hello Mike,
> 
> scsi-mq support for the iSCSI initiator is being considered but has not
> yet been implemented. For more information, see also Sagi Grimberg,
> [LSF/MM TOPIC] iSCSI MQ adoption via MCS discussion, linux-scsi mailing
> list, January 7, 2015 (http://thread.gmane.org/gmane.linux.scsi/98199).

OK, thanks.

FYI, I just used your fio test against an mpath device that is using 4
virtio-scsi devices with blk-mq enabled and all worked fine.

How easily could you reproduce your SRP hang?  Did it happen every run
or did it take multiple runs to see it?