The problem is found in meego testing on btrfs: http://bugs.meego.com/show_bug.cgi?id=6672 Reviewed-by: Hellwig, Christoph <hch@xxxxxxxxxxxxx> and Chinner, Dave <david@xxxxxxxxxxxxx> Signed-off-by: Zhong, Xin <xin.zhong@xxxxxxxxx> --- 248 | 57 ++++++++++++++++++++++++++++++++++++ 248.out | 2 + group | 1 + src/Makefile | 2 +- src/pwrite_mmap_blocked.c | 71 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 132 insertions(+), 1 deletions(-) create mode 100644 248 create mode 100644 248.out create mode 100644 src/pwrite_mmap_blocked.c diff --git a/248 b/248 new file mode 100644 index 0000000..ea4313f --- /dev/null +++ b/248 @@ -0,0 +1,57 @@ +#! /bin/bash +# FS QA Test No. 248 +# +# Test for pwrite hang problem when writing from mmaped buffer of the same page +# +#----------------------------------------------------------------------- +# Copyright (c) 2010 YOUR NAME HERE. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# +# creator +owner=xin.zhong@xxxxxxxxx + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* $TESTFILE +} + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +# real QA test starts here + +# Modify as appropriate. +_supported_fs generic +_supported_os Linux + +TESTFILE=$TEST_DIR/test_file +TEST_PROG=$here/src/pwrite_mmap_blocked + +$TEST_PROG $TESTFILE + +# success, all done +status=0 +exit diff --git a/248.out b/248.out new file mode 100644 index 0000000..d02c1ac --- /dev/null +++ b/248.out @@ -0,0 +1,2 @@ +QA output created by 248 +pwrite 1 bytes from 2 to 3 diff --git a/group b/group index 0f94dd9..a40c98f 100644 --- a/group +++ b/group @@ -361,3 +361,4 @@ deprecated 245 auto quick dir 246 auto quick rw 247 auto quick rw +248 auto quick rw diff --git a/src/Makefile b/src/Makefile index b827bd0..47d7334 100644 --- a/src/Makefile +++ b/src/Makefile @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ - stale_handle + stale_handle pwrite_mmap_blocked SUBDIRS = diff --git a/src/pwrite_mmap_blocked.c b/src/pwrite_mmap_blocked.c new file mode 100644 index 0000000..6e7d4e7 --- /dev/null +++ b/src/pwrite_mmap_blocked.c @@ -0,0 +1,71 @@ +/* Copyright (c) 2010 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <stdio.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <time.h> +#include <sys/mman.h> +#include <sys/signal.h> +#include <sys/stat.h> + + + +int main(int argc, char *argv[]) +{ + int ret; + char *cc = "01234"; + char *progname; + loff_t size; + int fd; + void *mapped_mem; + + progname = argv[0]; + size = 5; + fd = open(argv[1], O_RDWR|O_TRUNC|O_CREAT, 0666); + if (fd < 0) { + fprintf(stderr, "%s: Cannot open `%s': %s\n", + progname, argv[1], strerror(errno)); + exit(1); + } + + if ((ret = pwrite(fd, (const char *)cc, + size, 0)) != size) { + perror("pwrite"); + exit(1); + } + + mapped_mem = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (mapped_mem == MAP_FAILED) { + perror("mmap"); + exit(1); + } + loff_t amount = 1; + loff_t from = 2; + loff_t to = 3; + printf("pwrite %Ld bytes from %Ld to %Ld\n", amount, from, to); + ret = pwrite(fd, (char *)mapped_mem + from, amount, to); + if (ret != amount) { + perror("pwrite"); + exit(1); + } + munmap(mapped_mem,0); + close(fd); + exit(0); +} -- 1.6.2.2 _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
