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+#!/bin/bash
+# FS QA Test No. btrfs/082
+#
+# Regression test for a btrfs issue of resizing 'thread_pool' when
+# remount the fs.
+#
+# This regression was introduced by the following linux kernel commit:
+# btrfs: Added btrfs_workqueue_struct implemented ordered
+# execution based on kernel workqueue
+# 08a9ff3264181986d1d692a4e6fce3669700c9f8
+# And it was fixed by the following linux kernel commit:
+# btrfs: fix crash in remount(thread_pool=) case
+# 800ee2247f483b6d05ed47ef3bbc90b56451746c
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Fujitsu. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+
+_cleanup()
+{
+ rm -f $tmp.*
+}
+
+trap "_cleanup ; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+
+_scratch_mkfs |& _filter_mkfs
+
+_scratch_mount "-o thread_pool=6"
+_scratch_mount "-o remount,thread_pool=10"
+
+echo "Silence is golden"
+status=0
+exit