From owner-svn-src-user@freebsd.org Sun Jan 17 12:19:58 2016 Return-Path: Delivered-To: svn-src-user@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 713B1A859F7 for ; Sun, 17 Jan 2016 12:19:58 +0000 (UTC) (envelope-from pho@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4BC4B13A2; Sun, 17 Jan 2016 12:19:58 +0000 (UTC) (envelope-from pho@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u0HCJvrN081095; Sun, 17 Jan 2016 12:19:57 GMT (envelope-from pho@FreeBSD.org) Received: (from pho@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u0HCJvxM081094; Sun, 17 Jan 2016 12:19:57 GMT (envelope-from pho@FreeBSD.org) Message-Id: <201601171219.u0HCJvxM081094@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: pho set sender to pho@FreeBSD.org using -f From: Peter Holm Date: Sun, 17 Jan 2016 12:19:57 +0000 (UTC) To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r294217 - user/pho/stress2/misc X-SVN-Group: user MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-user@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the experimental " user" src tree" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 Jan 2016 12:19:58 -0000 Author: pho Date: Sun Jan 17 12:19:57 2016 New Revision: 294217 URL: https://svnweb.freebsd.org/changeset/base/294217 Log: Added a regression test. Sponsored by: EMC / Isilon storage division Added: user/pho/stress2/misc/dev.sh (contents, props changed) Added: user/pho/stress2/misc/dev.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/dev.sh Sun Jan 17 12:19:57 2016 (r294217) @@ -0,0 +1,128 @@ +#!/bin/sh + +# +# Copyright (c) 2016 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. +# +# $FreeBSD$ +# + +# Test parallel read access to /dev. + +# "panic: Most recently used by DEVFS1" seen. +# https://people.freebsd.org/~pho/stress/log/dev.txt +# Fixed by r293826. + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg + +here=`pwd` +cd /tmp +sed '1,/^EOF/d' < $here/$0 > dev.c +mycc -o dev -Wall -Wextra -O2 dev.c || exit 1 +rm -f dev.c + +daemon sh -c \ + "(cd $here/../testcases/swap; ./swap -t 6m -i 20 -k -l 100)" > \ + /dev/null + +/tmp/dev # Note: this runs as root. + +while pkill -9 swap; do + : +done + +rm -f /tmp/dev +exit +EOF +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#define PARALLEL 4 +#define RUNTIME 300 + +char path[80]; + +void +churn(char *path) +{ + FTS *fts; + FTSENT *p; + time_t start; + int fd, ftsoptions; + char *args[2]; + + ftsoptions = FTS_PHYSICAL; + args[0] = path; + args[1] = 0; + + start = time(NULL); + while (time(NULL) - start < RUNTIME) { + if ((fts = fts_open(args, ftsoptions, NULL)) == NULL) + err(1, "fts_open"); + + while ((p = fts_read(fts)) != NULL) { + if (p->fts_info == FTS_D || + p->fts_info == FTS_DP) + continue; + if ((fd = open(p->fts_path, O_RDONLY)) == -1) + continue; + usleep(arc4random() % 1000); + close(fd); + + } + + if (errno != 0 && errno != ENOENT) + warn("fts_read"); + if (fts_close(fts) == -1) + err(1, "fts_close()"); + } + + _exit(0); +} + +int +main(void) +{ + int i; + + for (i = 0; i < PARALLEL; i++) + if (fork() == 0) + churn("/dev"); + + for (i = 0; i < PARALLEL; i++) + wait(NULL); + + return (0); +}