On Mon, Sep 25, 2017 at 04:22:29PM +0000, Bart Van Assche wrote:
> On Mon, 2017-09-25 at 10:38 +0800, Ming Lei wrote:
> > On Fri, Sep 22, 2017 at 03:14:00PM -0700, Bart Van Assche wrote:
> > > Some people use the md driver on laptops and use the suspend and
> > > resume functionality. Since it is essential that submitting of
> > > new I/O requests stops before device quiescing starts, make the
> > > md resync and reshape threads freezable.
> >
> > Why is this patch part of this patchset? I don't think
> > MD is special enough wrt. the SCSI quiesce issue.
>
> Because the scope of this patch series is not only to make SCSI quiesce safe
> but also to avoid that suspend and resume lock up with a storage stack that
> uses the md driver.
If SCSI quiesce is safe, there shouldn't be suspend/resume lockup on any
SCSI device wrt. quiesce, right?
Did you see Martin's report which is on BTRFS(RAID) instead of MD?
https://marc.info/?l=linux-block&m=150634883816965&w=2
--
Ming
