On Tue, 2017-09-26 at 22:54 +0800, Ming Lei wrote: > On Tue, Sep 26, 2017 at 02:29:06PM +0000, Bart Van Assche wrote: > > On Tue, 2017-09-26 at 17:15 +0800, Ming Lei wrote: > > > No, if you only address issue on MD device, that is definitely not > > > alternative of my patchset. > > > > A clarification: my patch series not only fixes suspend and resume for > > md-on-SCSI > > but also for all other scenario's in which resume locks up due to no tag > > being > > available when the SCSI core tries to execute a power management command.> > I do care about if this patchset can fix non-MD cases, like > btrfs/raid, or transport_spi, both are real reports. Could you > make sure if your patchset can cover this non-MD devices?
Yes, I'm sure this patch series covers non-MD devices. It is easy to see that this patch series also covers SCSI parallel domain validation. Regarding BTRFS RAID: you should know that filesystems are responsible for implementing freeze / thaw support themselves. I think a filesystem must surround metadata operations by sb_start_write() / sb_end_write() and that it optionally can provide freeze_super / thaw_super callbacks in struct super_operations. In the BTRFS changelog there are several fixes with regard to freeze / thaw so I think this aspect of BTRFS has been tested. Bart.
