I'm seeing a failure like: generic/446 32s ... - output mismatch (see /root/xfstests-dev/results//generic/446.out.bad) --- tests/generic/446.out 2019-09-18 17:28:00.826721481 -0400 +++ /root/xfstests-dev/results//generic/446.out.bad 2019-11-28 18:56:36.583719464 -0500 @@ -1,2 +1,7 @@ QA output created by 446 +fallocate: Resource temporarily unavailable +fallocate: Resource temporarily unavailable +fallocate: Resource temporarily unavailable +fallocate: Resource temporarily unavailable +fallocate: Resource temporarily unavailable Silence is golden ... A bisect pins it on: 0e0cb35b417f NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE Have you seen this before? I took a quick look at a network trace to see if there were ALLOCATE or DEALLOCATE failures, but there weren't. The problem doesn't reproduce when the test is run under strace. That's all I've tried. --b.