On Wed, Aug 03, 2016 at 04:37:13PM -0600, Ross Zwisler wrote: > On Wed, Aug 03, 2016 at 11:11:27AM -0600, Ross Zwisler wrote: > > On Wed, Aug 03, 2016 at 10:33:54AM +1000, Dave Chinner wrote: > > > Hi folks, > > > > > > Just hit a reproducable hang in generic/361. Essentially this on > > > a 8GB pmem device: > > > > > > mkfs.xfs -f /dev/pmem1 > > > mount -o dax /dev/pmem1 /mnt/scratch > > > xfs_io -f -c "truncate 1g" test.img > > > losetup -f --show /mnt/scratch/test.img > > > mkfs.xfs -f /dev/loop0 > > > > > > And the mkfs.xfs command hangs with a discard that never completes: .... > > > This only reproduces when the underlying filesystem is mounted with > > > -o dax, so there is a bad interaction with loop devices and DAX > > > occurring somewhere. generic/361 is a recent test (committed june 14) > > > so this probably hasn't actually been tested until now. > > > > > > I haven't got time to look at this right now, hence the report. > > > > Cool, thanks for the report. I've reproduced this with linux/master, and the > > test passes with v4.7. > > > > Running a bisect... > > This bisected to a commit to the block layer code. I've sent a bug report to > the author of the commit. And the commit id is ...? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
