Date: Sun, 25 Oct 2015 09:16:20 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r289929 - user/pho/stress2/misc Message-ID: <201510250916.t9P9GKgB085259@repo.freebsd.org>
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Author: pho Date: Sun Oct 25 09:16:20 2015 New Revision: 289929 URL: https://svnweb.freebsd.org/changeset/base/289929 Log: Added a scenario for triggering EDEADLK in vm_pageout_clean(). Sponsored by: EMC / Isilon storage division Added: user/pho/stress2/misc/pageout.sh (contents, props changed) Added: user/pho/stress2/misc/pageout.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/pageout.sh Sun Oct 25 09:16:20 2015 (r289929) @@ -0,0 +1,142 @@ +#!/bin/sh + +# +# Copyright (c) 2015 EMC Corp. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. +# +# $FreeBSD$ +# + +# Trigger the two EDEADLK in vm/vm_pageout.c +# OOVM deadlock seen +# https://people.freebsd.org/~pho/stress/log/pageout.txt + +. ../default.cfg + +dir=/tmp +odir=`pwd` +cd $dir +sed '1,/^EOF/d' < $odir/$0 > $dir/pageout.c +mycc -o pageout -Wall -Wextra -g pageout.c || exit 1 +rm -f pageout.c +cd $odir + +mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint +mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart + +mdconfig -a -t swap -s 2g -u $mdstart || exit 1 +bsdlabel -w md$mdstart auto + +newfs -U md${mdstart}$part > /dev/null + +mount /dev/md${mdstart}$part $mntpoint +chmod 777 $mntpoint + +f1=$mntpoint/f1 +dd if=/dev/zero of=$f1 bs=1m count=1k 2>&1 | egrep -v "records|transferred" + +daemon sh -c "(cd ../testcases/swap; ./swap -t 5m -i 20 -l 100 -h)" > /dev/null +(cd /tmp; /tmp/pageout $f1) & +sleep .2 +while kill -0 $! 2> /dev/null; do + mksnap_ffs $mntpoint $mntpoint/.snap/stress2 && + rm -f $mntpoint/.snap/stress2 +done +while pgrep -q swap; do + pkill swap +done +wait + +while mount | grep $mntpoint | grep -q /dev/md; do + umount $mntpoint || sleep 1 +done +mdconfig -d -u $mdstart +rm -f /tmp/pageout /tmp/pageout.core +exit + +EOF +#include <sys/param.h> +#include <sys/fcntl.h> +#include <sys/mman.h> +#include <sys/stat.h> + +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <unistd.h> + +const char *file; + +#define RUNTIME 600 + +void +test(void) +{ + struct stat st; + size_t i, len; + time_t start; + int error, fd, ps; + char *p; + + ps = getpagesize(); + if ((fd = open(file, O_RDWR)) == -1) + err(1, "open(%s)", file); + if ((error = fstat(fd, &st)) == -1) + err(1, "stat(%s)", file); + len = round_page(st.st_size); + do { + if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, + fd, 0)) == MAP_FAILED) { + if (errno == ENOMEM) + len -= ps; + else + err(1, "mmap"); + } + } while (p == MAP_FAILED); + + start = time(NULL); + /* Touch all pages of the file. */ + for (i = 0; i < len; i += ps) + p[i] = 1; + while (time(NULL) - start < RUNTIME) + p[arc4random() % len] = 1; + + if (munmap(p, len) == -1) + err(1, "unmap()"); + close(fd); +} + +int +main(int argc, char *argv[]) +{ + if (argc != 2) + errx(1, "Usage: %s <file>", argv[0]); + file = argv[1]; + + test(); + + return (0); +}
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