[v4,3/3] generic: concurrent IO test with mixed IO types
diff mbox

Message ID 1434706419-5589-3-git-send-email-eguan@redhat.com
State New
Headers show

Commit Message

Eryu Guan June 19, 2015, 9:33 a.m. UTC
Test concurrent buffered I/O, DIO, AIO, mmap I/O and splice I/O on the
same files.

Signed-off-by: Eryu Guan <eguan@redhat.com>

This fio job file has been proven to be potent, it triggers WARNINGs on ext4
and xfs with 4.1-rc6 kernel.

ext4: WARNING: at fs/ext4/inode.c:1328
xfs: WARNING: CPU: 7 PID: 3090 at fs/xfs/xfs_file.c:726 xfs_file_dio_aio_write+0x176/0x2a8 [xfs]()

The ext4 issue should be fixed by Lukas's patch
ext4: fix reservation release on invalidatepage for delalloc fs

The xfs warning is on purpose, so it's filtered out and test still passes on
xfs. Note that I filter another similar warning

WARNING: CPU: 0 PID: 14519 at fs/xfs/xfs_file.c:341 xfs_file_read_iter+0x230/0x2b0 [xfs]()

It's not triggerd everytime but not hard to see. I'm not so sure if it should
be filtered out too, please review.

Also, the fio job ever paniced kernel in mm code and hung xfs. The hang in xfs
was in splice code but it's gone on current 4.1-rcX kernel.

I reduced the numjobs and iodepth to reduce the test time(~25s on my test host)
and scale them by $LOAD_FACTOR. And it still could trigger the warning on
ext4(with certain fio version, e.g. fio-2.1) with reduced workload.

- use mktemp to create tmp fio job file
- initialize scratch dev and mount it correctly before test
- roll back to use /tmp/$$ as tmp
- filter out xfs intentional WARNINGs when checking dmesg, to make the test pass on xfs

 tests/generic/090     | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/090.out |   2 +
 tests/generic/group   |   1 +
 3 files changed, 144 insertions(+)
 create mode 100755 tests/generic/090
 create mode 100644 tests/generic/090.out

diff mbox

diff --git a/tests/generic/090 b/tests/generic/090
new file mode 100755
index 0000000..69bc988
--- /dev/null
+++ b/tests/generic/090
@@ -0,0 +1,141 @@ 
+#! /bin/bash
+# FS QA Test generic/090
+# Concurrent mixed I/O (buffer I/O, aiodio, mmap, splice) on the same files
+# Copyright (c) 2015 Red Hat Inc. 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
+# 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
+seq=`basename $0`
+echo "QA output created by $seq"
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+	cd /
+	rm -f $tmp.*
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+iodepth=$((16 * LOAD_FACTOR))
+iodepth_batch=$((8 * LOAD_FACTOR))
+numjobs=$((5 * LOAD_FACTOR))
+cat >$fio_config <<EOF
+# with ioengine=mmap and direct=1, fio requires bs to be at least pagesize,
+# which is a fio built-in var.
+echo 'bs=$pagesize' >> $fio_config
+rm -f $seqres.full
+_require_fio $fio_config
+_scratch_mkfs >>$seqres.full 2>&1
+echo "Silence is golden"
+$FIO_PROG $fio_config >>$seqres.full 2>&1
+# xfs generates WARNINGs on purpose when applications mix buffered/mmap IO with
+# direct IO on the same file. On the other hand, this fio job has been proven
+# to be potent, we don't want to simply _disable_dmesg_check which could miss
+# other potential bugs. So filter out the intentional WARNINGs, make sure test
+# doesn't fail because of this warning and fails on other WARNINGs.
+	local warn1="WARNING:.*fs/xfs/xfs_file\.c:.*xfs_file_dio_aio_write.*"
+	local warn2="WARNING:.*fs/xfs/xfs_file\.c:.*xfs_file_read_iter.*"
+	sed -e "s#$warn1#Intentional warnings in xfs_file_dio_aio_write#" \
+	    -e "s#$warn2#Intentional warnings in xfs_file_read_iter#"
+# umount before checking dmesg in case umount triggers any WARNING or Oops
+if [ "$FSTYP" == "xfs" ]; then
+	_check_dmesg filter_xfs_dmesg
+	_check_dmesg
diff --git a/tests/generic/090.out b/tests/generic/090.out
new file mode 100644
index 0000000..2b5100d
--- /dev/null
+++ b/tests/generic/090.out
@@ -0,0 +1,2 @@ 
+QA output created by 090
+Silence is golden
diff --git a/tests/generic/group b/tests/generic/group
index 0c8964c..2e534a5 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -92,6 +92,7 @@ 
 087 perms auto quick
 088 perms auto quick
 089 metadata auto
+090 auto rw stress
 091 rw auto quick
 092 auto quick prealloc
 093 attr cap udf auto