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Zorro Lang
1d295771ad
generic/084 try to run 'tail' command, tail will use inotify.
There're some limit about the number of inotify. For example
fs.inotify.max_user_instances specifies an upper limit on
the number of inotify instances that can be created per real
user ID.
When I test on a machine with 154 cpu cores, this case run
failed, and hit many warning likes:
+tail: inotify cannot be used, reverting to polling: Too many open files
Because the fs.inotify.max_user_instances is 128, so if we
try to tail 154 files, it will be failed.
So use src/multi_open_unlink to instead of tail will avoid
this problem.
Signed-off-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
98 lines
2.3 KiB
Bash
Executable File
98 lines
2.3 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 084
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#
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# Test hardlink to unlinked file.
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#
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# Regression test for commit:
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# aae8a97 fs: Don't allow to create hardlink for deleted file
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2015 Red Hat Inc. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_scratch
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link_unlink_storm()
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{
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local src=$1
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local target=$2
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local i=0
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while true; do
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ln -f $src $target.$i >/dev/null 2>&1
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rm -f $target.$i >/dev/null 2>&1
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let i=i+1
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done
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}
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rm -f $seqres.full
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nr_cpu=`$here/src/feature -o`
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echo "Silence is golden"
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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# create, open & unlinked files so unlinked inode list is not empty
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src/multi_open_unlink -f $SCRATCH_MNT/$seq.unlinked -n $nr_cpu &
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open_pid=$!
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# start link/unlink storm
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src=$SCRATCH_MNT/$seq.target
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touch $src
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for i in `seq 1 $nr_cpu`; do
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target=$SCRATCH_MNT/$seq.target.link.$i
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link_unlink_storm $src $target &
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link_pids="$link_pids $!"
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done
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# remove & re-create target to race with link/unlink
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while true; do
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rm -f $src
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touch $src
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done &
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sleep 5
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kill $! >/dev/null 2>&1
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kill $open_pid $link_pids >/dev/null 2>&1
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wait $open_pid $link_pids
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# all done, no oops/hang expected, _check_filesystems checks SCRATCH_DEV after test
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status=0
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exit
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