2 # SPDX-License-Identifier: GPL-2.0+
3 # Copyright (c) 2019 Oracle, Inc. All Rights Reserved.
7 # Stress test creating a lot of unlinked O_TMPFILE files and recovering them
8 # after a crash, checking that we don't blow up the filesystem. This is sort
9 # of a performance test for the xfs unlinked inode backref patchset, but it
10 # applies to most other filesystems.
12 # Use only a single CPU to test the single threaded situation.
15 seqres=$RESULT_DIR/$seq
16 echo "QA output created by $seq"
18 status=1 # failure is the default!
19 testfile=$TEST_DIR/$seq.txt
20 trap "_cleanup; exit \$status" 0 1 2 3 15
28 # get standard environment, filters and checks
31 # real QA test starts here
35 _require_scratch_shutdown
36 _require_metadata_journaling
37 _require_test_program "t_open_tmpfiles"
40 _scratch_mkfs >> $seqres.full 2>&1
43 # Set ULIMIT_NOFILE to min(file-max / 2, 50000 files per LOAD_FACTOR)
44 # so that this test doesn't take forever or OOM the box
45 max_files=$((50000 * LOAD_FACTOR))
46 max_allowable_files=$(( $(cat /proc/sys/fs/file-max) / 2 ))
47 test $max_allowable_files -gt 0 && test $max_files -gt $max_allowable_files && \
48 max_files=$max_allowable_files
51 # Open a lot of unlinked files
52 echo create >> $seqres.full
53 $here/src/t_open_tmpfiles $SCRATCH_MNT $(_scratch_shutdown_handle) >> $seqres.full
55 # Unmount to prove that we can clean it all
56 echo umount >> $seqres.full
60 echo "Unmount took $((after - before))s." >> $seqres.full
62 # Mount so that we can run the usual checks
63 echo silence is golden