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
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Johannes Thumshirn SUSE Labs Filesystems
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