1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause 5# 6# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org> 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# zfs deadlock on r360452 relating to busy vm page 31# 0 5804 5803 0 52 0 13048 2740 prev->lr DC+ 0 0:00.00 tail -F blah 32# 0 5805 5802 0 52 0 12976 2636 pgnslp DC+ 0 0:00.00 dd if=/dev/zero of=blah 33 34# Test scenario by Bryan Drewery <bdrewery@FreeBSD.org> 35 36[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 37[ `uname -m` = "i386" ] && exit 0 38[ `sysctl -n kern.kstack_pages` -lt 4 ] && exit 0 39 40. ../default.cfg 41 42kldstat -v | grep -q zfs.ko || { kldload zfs.ko || 43 exit 0; loaded=1; } 44 45u1=$mdstart 46u2=$((u1 + 1)) 47 48set -e 49mdconfig -l | grep -q md$u1 && mdconfig -d -u $u1 50mdconfig -l | grep -q md$u2 && mdconfig -d -u $u2 51 52mdconfig -s 2g -u $u1 53mdconfig -s 2g -u $u2 54 55zpool list | egrep -q "^stress2_tank" && zpool destroy stress2_tank 56[ -d /stress2_tank ] && rm -rf /stress2_tank 57zpool create stress2_tank raidz md$u1 md$u2 58zfs create stress2_tank/test 59set +e 60 61cd /stress2_tank/test 62timeout 10s sh -c '\ 63 dd if=/dev/zero of=blah status=none & tail -F blah > /dev/null' & 64sleep 5 65ps -l | grep -v grep | grep -q pgnslp && { s=1; echo FAIL; } 66ps -l | grep -v grep | grep blah 67wait 68cd / 69 70zfs umount stress2_tank/test 71zfs destroy -r stress2_tank 72zpool destroy stress2_tank 73 74mdconfig -d -u $u1 75mdconfig -d -u $u2 76[ $loaded ] && kldunload zfs.ko 77exit $s 78