btrfs: add helper to kill background process running _btrfs_stress_defrag
Killing a background process running _btrfs_stress_defrag() is not as
simple as sending a signal to the process and waiting for it to die.
Therefore we have the following logic to terminate such process:
kill $pid
wait $pid
while ps aux | grep "btrfs filesystem defrag" | grep -qv grep; do
sleep 1
done
Since this is repeated in several test cases, move this logic to a common
helper and use it in all affected test cases. This will help to avoid
repeating the same code again several times in upcoming changes.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
6 files changed
