4 # Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
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.
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
31 # Regression test. This script caused this panic:
33 # panic: lockmgr: locking against myself
36 # [thread pid 2526 tid 100070 ]
37 # Stopped at kdb_enter+0x2b: nop
39 # Tracing pid 2526 tid 100070 td 0xc46f8360
40 # kdb_enter(c094247f) at kdb_enter+0x2b
41 # panic(c09402b6,c46f8360,0,12,c06af5d9,...) at panic+0x14b
42 # _lockmgr(d864a748,202122,c479f788,c46f8360,c094b01c,12d) at _lockmgr+0x41a
43 # getblk(c479f6b8,5d51940,0,4000,0,...) at getblk+0x13c
44 # breadn(c479f6b8,5d51940,0,4000,0,...) at breadn+0x2f
45 # bread(c479f6b8,5d51940,0,4000,0,e6d13544,c4743eac,0,c095a185,56d) at bread+0x20
46 # ffs_alloccg(c47408c4,104,1754628,0,4000,c4743eac,1,c095a185,4d8) at ffs_alloccg+0x11d
47 # ffs_hashalloc(c47408c4,104,1754628,0,4000,...) at ffs_hashalloc+0x45
48 # ffs_alloc(c47408c4,3f2cd,0,1754628,0,4000,c42fd400,e6d13674) at ffs_alloc+0x1a5
49 # ffs_balloc_ufs2(c4735d70,fcb34000,0,4000,c42fd400,...) at ffs_balloc_ufs2+0x1619
50 # ffs_copyonwrite(c479f6b8,d84e3d08) at ffs_copyonwrite+0x3d3
51 # ffs_geom_strategy(c479f7c0,d84e3d08) at ffs_geom_strategy+0xbd
52 # bufwrite(d84e3d08,4000,d84e3d08,e6d137e4,c070b7a9,...) at bufwrite+0x17a
53 # ffs_bufwrite(d84e3d08) at ffs_bufwrite+0x282
54 # vfs_bio_awrite(d84e3d08) at vfs_bio_awrite+0x235
55 # bdwrite(d864a6e8,c4743eac,0,c095a185,57c,...) at bdwrite+0x237
56 # ffs_alloccg(c4b54a50,104,1754628,0,4000,c4743eac,1,c095a185,4d8) at ffs_alloccg+0x1f6
57 # ffs_hashalloc(c4b54a50,104,1754628,0,4000,...) at ffs_hashalloc+0x45
58 # ffs_alloc(c4b54a50,1b00c,0,1754628,0,4000,c4b22a80,e6d139ac) at ffs_alloc+0x1a5
59 # ffs_balloc_ufs2(c4e72158,6c030000,0,4000,c4b22a80,...) at ffs_balloc_ufs2+0x1619
60 # ffs_write(e6d13b98) at ffs_write+0x2ac
61 # VOP_WRITE_APV(c0a00e80,e6d13b98) at VOP_WRITE_APV+0x132
62 # vn_write(c46c65a0,e6d13c60,c4b22a80,0,c46f8360) at vn_write+0x1f6
63 # dofilewrite(c46f8360,4,c46c65a0,e6d13c60,ffffffff,...) at dofilewrite+0x77
64 # kern_writev(c46f8360,4,e6d13c60,8430000,d0000,...) at kern_writev+0x36
65 # write(c46f8360,e6d13d00) at write+0x45
66 # syscall(e6d13d38) at syscall+0x256
69 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
73 while [ $? -ne 0 ]; do
79 diskfree=`df -k /var/tmp | tail -1 | awk '{print $4}'`
80 [ $((diskfree / 1024 / 1024)) -lt 5 ] && echo "Not enough disk space" && exit 1
82 rm -f /var/.snap/pho /var/tmp/big.?
83 trap "rm -f /var/.snap/pho /var/tmp/big.?" 0
84 persist 'mksnap_ffs /var /var/.snap/pho'
85 sysctl vfs.dirtybufthresh=10 > /dev/null 2>&1
89 old=`sysctl vfs.altbufferflushes | awk '{print $NF}'`
91 echo "`date '+%T'` Create big.$i"
92 dd if=/dev/zero of=big.$i bs=1m count=4k 2>&1 | egrep -v "records|transferred"
96 new=`sysctl vfs.altbufferflushes | awk '{print $NF}'`
97 [ $new -ne $old ] && echo "vfs.altbufferflushes changed from $old to $new."