132 lines
3.3 KiB
Bash
Executable File
132 lines
3.3 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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# Alternate buffer flush path test (Not verified).
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# Regression test for r169006.
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# Apply this patch to amplify the problem:
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#
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# diff -r1.520 vfs_bio.c
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# 894c894
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# < if (bo->bo_dirty.bv_cnt > dirtybufthresh + 10) {
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# ---
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# > if (bo->bo_dirty.bv_cnt > dirtybufthresh /*+ 10*/) {
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. ../default.cfg
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odir=`pwd`
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dir=$RUNDIR/alternativeFlushPath
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[ -d $dir ] && find $dir -type f | xargs rm
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rm -rf $dir
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mkdir -p $dir
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/alternativeFlushPath.c
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mycc -o /tmp/alternativeFlushPath -Wall -Wextra alternativeFlushPath.c ||
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exit 1
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rm -f alternativeFlushPath.c
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for j in `jot 10`; do
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/tmp/alternativeFlushPath &
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done
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wait
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sysctl vfs.altbufferflushes
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cd $odir
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rm -rf /tmp/alternativeFlushPath $dir
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exit
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EOF
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/signal.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <err.h>
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#define MAXNOFILE 500000 /* To limit runtime */
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static volatile sig_atomic_t more;
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static void
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handler(int i __unused) {
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more = 0;
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}
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void
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test(void)
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{
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int i, j;
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char name[80];
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pid_t mypid;
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int *fd;
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struct rlimit rlp;
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if (getrlimit(RLIMIT_NOFILE, &rlp) == -1)
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err(1, "getrlimit(RLIMIT_NOFILE)");
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if (rlp.rlim_cur > MAXNOFILE)
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rlp.rlim_cur = MAXNOFILE;
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rlp.rlim_cur /= 10;
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mypid = getpid();
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fd = malloc(rlp.rlim_cur * sizeof(int));
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for (i = 0, j = 0; i < rlp.rlim_cur && more == 1; i++, j++) {
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sprintf(name, "f%05d.%05d", mypid, i);
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if ((fd[i] = open(name, O_CREAT|O_WRONLY, 0666)) == -1) {
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warn("open(%s)", name);
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more = 0;
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break;
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}
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}
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for (i = 0; i < j; i++) {
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sprintf(name, "f%05d.%05d", mypid, i);
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if (unlink(name) == -1)
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warn("unlink(%s)", name);
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}
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for (i = 0; i < j; i++) {
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if (close(fd[i]) == -1)
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warn("close(%d)", i);
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}
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free(fd);
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}
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int
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main()
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{
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more = 1;
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signal(SIGALRM, handler);
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alarm(20 * 60);
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while (more == 1)
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test();
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return(0);
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}
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