This adds a regression test for the following kernel patch: xfs: always use DAX if mount option is used
This test will also pass with kernel v4.14-rc1 and beyond because the XFS DAX I/O mount option has been disabled (but not removed), so the "chattr -x" to turn off DAX doesn't actually do anything. Signed-off-by: Ross Zwisler <ross.zwis...@linux.intel.com> Suggested-by: Christoph Hellwig <h...@infradead.org> --- tests/xfs/431 | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/xfs/431.out | 3 +++ tests/xfs/group | 1 + 3 files changed, 85 insertions(+) create mode 100755 tests/xfs/431 create mode 100644 tests/xfs/431.out diff --git a/tests/xfs/431 b/tests/xfs/431 new file mode 100755 index 0000000..4ff3a02 --- /dev/null +++ b/tests/xfs/431 @@ -0,0 +1,81 @@ +#! /bin/bash +# FS QA Test xfs/431 +# +# This is a regression test for kernel patch: +# xfs: always use DAX if mount option is used +# created by Ross Zwisler <ross.zwis...@linux.intel.com> +# +#----------------------------------------------------------------------- +# Copyright (c) 2017 Intel Corporation. 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 +#----------------------------------------------------------------------- + +seq=`basename $0` +seqres=$RESULT_DIR/$seq +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.* +} + +# get standard environment, filters and checks +. ./common/rc + +# remove previous $seqres.full before test +rm -f $seqres.full + +# Modify as appropriate. +_supported_os Linux +_supported_fs xfs +_require_scratch_dax + +# real QA test starts here +# format and mount +_scratch_mkfs > $seqres.full 2>&1 +_scratch_mount "-o dax" >> $seqres.full 2>&1 + +pgsize=`$here/src/feature -s` + +# disable tracing, clear the existing trace buffer and turn on dax tracepoints +echo 0 > /sys/kernel/debug/tracing/tracing_on +echo > /sys/kernel/debug/tracing/trace +echo 1 > /sys/kernel/debug/tracing/events/fs_dax/enable + +# enable tracing for our one mmap I/O, then see if dax was used +echo 1 > /sys/kernel/debug/tracing/tracing_on +xfs_io -t -c "truncate $pgsize" \ + -c "chattr -x" \ + -c "mmap -r 0 $pgsize" -c "mread 0 $pgsize" -c "munmap" \ + -f $SCRATCH_MNT/testfile >> $seqres.full +echo 0 > /sys/kernel/debug/tracing/tracing_on + +grep -q 'xfs_io.*dax_load_hole' /sys/kernel/debug/tracing/trace +if [[ $? == 0 ]]; then + echo "DAX was used" +else + echo "DAX was NOT used" +fi + +# success, all done +echo "Silence is golden" +status=0 +exit diff --git a/tests/xfs/431.out b/tests/xfs/431.out new file mode 100644 index 0000000..265dc46 --- /dev/null +++ b/tests/xfs/431.out @@ -0,0 +1,3 @@ +QA output created by 431 +DAX was used +Silence is golden diff --git a/tests/xfs/group b/tests/xfs/group index 0a449b9..4e7019c 100644 --- a/tests/xfs/group +++ b/tests/xfs/group @@ -427,3 +427,4 @@ 428 dangerous_fuzzers dangerous_scrub dangerous_online_repair 429 dangerous_fuzzers dangerous_scrub dangerous_repair 430 dangerous_fuzzers dangerous_scrub dangerous_online_repair +431 auto quick -- 2.9.5 _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm