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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2013 Red Hat, Inc. All Rights Reserved.
#
# FS QA Test No. 305
#
# Regression test for commit:
# 9559996 ext4: remove mb_groups before tearing down the buddy_cache
#
. ./common/preamble
_begin_fstest auto
PIDS=""
# Override the default cleanup function.
_cleanup()
{
cd /
kill $PIDS >/dev/null 2>&1
}
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs ext4
_require_scratch
echo "Silence is golden"
DEV_BASENAME=$(_short_dev $SCRATCH_DEV)
echo "Start test on device $SCRATCH_DEV, basename $DEV_BASENAME" >$seqres.full
_scratch_mkfs >>$seqres.full 2>&1
while true; do
cat /proc/fs/ext4/$DEV_BASENAME/mb_groups > /dev/null 2>&1
done &
PIDS=$!
# 30 loops is enough to crash a buggy kernel
i=0
while [ $i -lt 30 ]; do
_try_scratch_mount
_scratch_unmount
let i=i+1
done
# no BUG_ON, all done
kill $PIDS >/dev/null 2>&1
wait
status=0
exit
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