Regression test for fix https://lkml.org/lkml/2017/3/22/789 Page cache should be dropped after successful discard Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx> --- common/config | 1 + tests/blockdev/001 | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++ tests/blockdev/001.out | 7 +++++ tests/blockdev/group | 6 ++++ 4 files changed, 88 insertions(+) create mode 100755 tests/blockdev/001 create mode 100644 tests/blockdev/001.out create mode 100644 tests/blockdev/group diff --git a/common/config b/common/config index cfe7913..aef842c 100644 --- a/common/config +++ b/common/config @@ -199,6 +199,7 @@ export LOGGER_PROG="`set_prog_path logger`" export DBENCH_PROG="`set_prog_path dbench`" export DMSETUP_PROG="`set_prog_path dmsetup`" export WIPEFS_PROG="`set_prog_path wipefs`" +export BLKDISCARD_PROG="`set_prog_path blkdiscard`" export DUMP_PROG="`set_prog_path dump`" export RESTORE_PROG="`set_prog_path restore`" export LVM_PROG="`set_prog_path lvm`" diff --git a/tests/blockdev/001 b/tests/blockdev/001 new file mode 100755 index 0000000..53b0664 --- /dev/null +++ b/tests/blockdev/001 @@ -0,0 +1,74 @@ +#! /bin/bash +# FS QA Test 001 +# +# Regression test for fix https://lkml.org/lkml/2017/3/22/789 +# Page cache should be dropped after successful discard +# +#----------------------------------------------------------------------- +# Copyright (c) 2017 Dmitry Monakhov <dmonakhov@xxxxxxxxxx> +# 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 +. ./common/filter +. ./common/scsi_debug + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here +_supported_fs generic +_supported_os Linux +_require_scsi_debug +_require_command $BLKDISCARD_PROG blkdiscard + + +# Create virtual device with unmap_zeroes_data support +dev=$(_get_scsi_debug_dev 512 512 0 32 "lbpws=1 lbpws10=1") + +# Initialize data with known pattern +$XFS_IO_PROG -c "pwrite -S 0xaa -b 2M 0 32M -w" -d $dev >>$seqres.full 2>&1 || \ + _fail "pwrite failed" + +# Fill page cache with dirty data +$XFS_IO_PROG -c "pwrite -S 0xbb -b 2M 2M 10M" -f $dev >>$seqres.full 2>&1 || \ + _fail "pwrite failed" + +$BLKDISCARD_PROG $dev +# After device was fully discarded, read sould return all zeroes +dd if=$dev bs=4k 2>>$seqres.full | hexdump +dd if=$dev bs=4M iflag=direct 2>>$seqres.full | hexdump +# success, all done +status=0 +exit diff --git a/tests/blockdev/001.out b/tests/blockdev/001.out new file mode 100644 index 0000000..0f81a92 --- /dev/null +++ b/tests/blockdev/001.out @@ -0,0 +1,7 @@ +QA output created by 001 +0000000 0000 0000 0000 0000 0000 0000 0000 0000 +* +2000000 +0000000 0000 0000 0000 0000 0000 0000 0000 0000 +* +2000000 diff --git a/tests/blockdev/group b/tests/blockdev/group new file mode 100644 index 0000000..bdfdcb9 --- /dev/null +++ b/tests/blockdev/group @@ -0,0 +1,6 @@ +# QA groups control file +# Defines test groups and nominal group owners +# - do not start group names with a digit +# - comment line before each group is "new" description +# +001 rw blockdev -- 2.9.3
