On 25/01/2019 01:12, Liu Bo wrote: > In fact the hang can be easily reproduced by the below script, > > H=/sys/fs/cgroup/unified/ > P=/sys/fs/cgroup/unified/test > > echo "+io" > $H/cgroup.subtree_control > mkdir -p $P > > echo $$ > $P/cgroup.procs > > xfs_io -f -d -c "pwrite 0 4k" /dev/sdg > > echo "`cat /sys/block/sdg/dev` target=1000000" > $P/io.latency > > xfs_io -f -d -c "pwrite 0 4k" /dev/sdg Can you please turn this into a testcase for blktests as well? Thanks, Johannes -- Johannes Thumshirn SUSE Labs Filesystems jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
