1#!/bin/sh 2 3# 4# Copyright (c) 2015 EMC Corp. 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Test scenario for exhausting limited malloc KVA on 32bit machine, by 30# extending a file on a UFS SU volume. 31 32# Create a large file on a file system with trim enabled. 33# Watchdog timeout seen: 34# https://people.freebsd.org/~pho/stress/log/trim6.txt 35# Fixed by r287361. 36 37# "panic: negative mnt_ref" seen: 38# https://people.freebsd.org/~pho/stress/log/kostik835.txt 39 40[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 41 42r=`mount | grep -w soft-updates | awk '{print $1}' | while read dev; do 43 dumpfs $dev | head -20 | grep -qw trim || continue 44 df -k $dev 45done | sort -rn +3 | head -1 | awk '{print $4, $6}'` 46[ -z "$r" ] && exit # No trim enabled file systems found 47set $r 48free=$(($1 / 1024 / 10 * 9)) # in Mb 49max=$((128 * 1024)) # Max is 128 GB 50[ $free -gt $max ] && free=$max 51mp=$2 52image=`echo $mp/diskimage | sed s#//#/#` # fix "//" for case mp = "/" 53trap "rm -f $image" EXIT INT 54 55echo "dd if=/dev/zero of=$image bs=1m count=$free" 56dd if=/dev/zero of=$image bs=1m count=$free status=none 57exit 0 58