mread copies data one-byte-at-a-time, so it may races with
reflink_range() who invalidates page cache of the dest file.
Allow this race by adjusting the egrep regexp.
Reported-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Suggested-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
---
tests/generic/670 | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tests/generic/670 b/tests/generic/670
index 83fbd0b9..4a895d90 100755
--- a/tests/generic/670
+++ b/tests/generic/670
@@ -40,7 +40,10 @@ _cp_reflink $testdir/file1 $testdir/file3
_scratch_cycle_mount
fbytes() {
- egrep -v '(61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61|62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62)'
+ # Different with generic/164,165, mread copies data from mmapped area
+ # one-byte-at-a-time, which may cause races during reflink_range().
+ # So the result of _mread_range() may be a mix of 61 and 62.
+ egrep -v '((61|62) ){15}(61|62)'
}
reader() {
--
2.34.1
