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