Write data into a file and then enable DAX on the file immediately,
the written data which is still in the buffer will be lost when
the corresponding inode is evicted.
It's a regression test for commit 26b15a042b8a.
Signed-off-by: Xiao Yang <yangx.jy@xxxxxxxxxxx>
---
tests/generic/608 | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/tests/generic/608 b/tests/generic/608
index d81a2488..674bd2cf 100755
--- a/tests/generic/608
+++ b/tests/generic/608
@@ -7,6 +7,12 @@
# file change immediately when all applications close the file.
# It's a regression test for:
# 'commit e7bed0b5bc4b ("fs: Kill DCACHE_DONTCACHE dentry even if DCACHE_REFERENCED is set")'
+#
+# Write data into a file and then enable DAX on the file immediately,
+# the written data which is still in the buffer will be lost when the
+# corresponding inode is evicted.
+# It's a regression test for:
+# 'commit 26b15a042b8a ("fs: Handle I_DONTCACHE in iput_final() instead of generic_drop_inode()"'
seq=`basename $0`
seqres=$RESULT_DIR/$seq
@@ -87,6 +93,26 @@ test_disable_dax()
_check_s_dax $t_file 0
}
+test_buffered_data_lost()
+{
+ local t_file=$SCRATCH_MNT/datafile
+
+ # Write data into a file
+ echo "Buffered data" > $t_file
+
+ # Then enable DAX on the file immediately
+ $XFS_IO_PROG -c 'chattr +x' $t_file
+
+ # Without commit e7bed0b5bc4b, ensure inode can
+ # be evicted by drop_caches
+ echo 2 > /proc/sys/vm/drop_caches
+
+ # The written data which is still in the buffer will be lost
+ grep -q "Buffered data" $t_file || echo "Buffered data is lost"
+
+ rm -f $t_file
+}
+
do_tests()
{
local mount_option=$1
@@ -100,6 +126,9 @@ do_tests()
test_enable_dax
test_disable_dax
+ # Do test for commit 26b15a042b8a
+ test_buffered_data_lost
+
_scratch_unmount
}
--
2.21.0
