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. Bart.