On Mon, Sep 25, 2017 at 01:29:18PM -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. As I explained, if SCSI quiesce is safe, this patch shouldn't be needed. The issue isn't MD specific, and in theory can be triggered on all devices. And you can see the I/O hang report on BTRFS(RAID) without MD involved: https://marc.info/?l=linux-block&m=150634883816965&w=2 So please remove this patch from the patchset. -- Ming
