99 lines
4.2 KiB
Bash
Executable File
99 lines
4.2 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
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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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# Regression test. This script caused this panic:
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# panic: lockmgr: locking against myself
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# cpuid = 2
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# KDB: enter: panic
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# [thread pid 2526 tid 100070 ]
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# Stopped at kdb_enter+0x2b: nop
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# db> bt
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# Tracing pid 2526 tid 100070 td 0xc46f8360
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# kdb_enter(c094247f) at kdb_enter+0x2b
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# panic(c09402b6,c46f8360,0,12,c06af5d9,...) at panic+0x14b
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# _lockmgr(d864a748,202122,c479f788,c46f8360,c094b01c,12d) at _lockmgr+0x41a
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# getblk(c479f6b8,5d51940,0,4000,0,...) at getblk+0x13c
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# breadn(c479f6b8,5d51940,0,4000,0,...) at breadn+0x2f
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# bread(c479f6b8,5d51940,0,4000,0,e6d13544,c4743eac,0,c095a185,56d) at bread+0x20
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# ffs_alloccg(c47408c4,104,1754628,0,4000,c4743eac,1,c095a185,4d8) at ffs_alloccg+0x11d
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# ffs_hashalloc(c47408c4,104,1754628,0,4000,...) at ffs_hashalloc+0x45
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# ffs_alloc(c47408c4,3f2cd,0,1754628,0,4000,c42fd400,e6d13674) at ffs_alloc+0x1a5
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# ffs_balloc_ufs2(c4735d70,fcb34000,0,4000,c42fd400,...) at ffs_balloc_ufs2+0x1619
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# ffs_copyonwrite(c479f6b8,d84e3d08) at ffs_copyonwrite+0x3d3
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# ffs_geom_strategy(c479f7c0,d84e3d08) at ffs_geom_strategy+0xbd
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# bufwrite(d84e3d08,4000,d84e3d08,e6d137e4,c070b7a9,...) at bufwrite+0x17a
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# ffs_bufwrite(d84e3d08) at ffs_bufwrite+0x282
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# vfs_bio_awrite(d84e3d08) at vfs_bio_awrite+0x235
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# bdwrite(d864a6e8,c4743eac,0,c095a185,57c,...) at bdwrite+0x237
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# ffs_alloccg(c4b54a50,104,1754628,0,4000,c4743eac,1,c095a185,4d8) at ffs_alloccg+0x1f6
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# ffs_hashalloc(c4b54a50,104,1754628,0,4000,...) at ffs_hashalloc+0x45
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# ffs_alloc(c4b54a50,1b00c,0,1754628,0,4000,c4b22a80,e6d139ac) at ffs_alloc+0x1a5
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# ffs_balloc_ufs2(c4e72158,6c030000,0,4000,c4b22a80,...) at ffs_balloc_ufs2+0x1619
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# ffs_write(e6d13b98) at ffs_write+0x2ac
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# VOP_WRITE_APV(c0a00e80,e6d13b98) at VOP_WRITE_APV+0x132
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# vn_write(c46c65a0,e6d13c60,c4b22a80,0,c46f8360) at vn_write+0x1f6
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# dofilewrite(c46f8360,4,c46c65a0,e6d13c60,ffffffff,...) at dofilewrite+0x77
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# kern_writev(c46f8360,4,e6d13c60,8430000,d0000,...) at kern_writev+0x36
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# write(c46f8360,e6d13d00) at write+0x45
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# syscall(e6d13d38) at syscall+0x256
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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persist () {
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false
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while [ $? -ne 0 ]; do
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$1 > /dev/null 2>&1
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sleep 1
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done
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}
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diskfree=`df -k /var/tmp | tail -1 | awk '{print $4}'`
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[ $((diskfree / 1024 / 1024)) -lt 5 ] && echo "Not enough disk space" && exit 1
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rm -f /var/.snap/stress2 /var/tmp/big.?
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trap "rm -f /var/.snap/stress2 /var/tmp/big.?" EXIT INT
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persist 'mksnap_ffs /var /var/.snap/stress2'
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tresh=`sysctl vfs.dirtybufthresh | awk '{print $NF}'`
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sysctl vfs.dirtybufthresh=10
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cd /var/tmp
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for j in `jot 5`; do
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old=`sysctl vfs.altbufferflushes | awk '{print $NF}'`
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for i in `jot 4`; do
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echo "`date '+%T'` Create big.$i"
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dd if=/dev/zero of=big.$i bs=1m count=4k status=none
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done
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sleep 1
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rm -rf /var/tmp/big.?
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new=`sysctl vfs.altbufferflushes | awk '{print $NF}'`
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[ $new -ne $old ] && echo "vfs.altbufferflushes changed from $old to $new."
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done
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sysctl vfs.dirtybufthresh=$tresh
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rm -f /var/.snap/stress2
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