Am 28.07.2026 um 18:39 hat Michael Tokarev geschrieben:
> qemu-iotest 161 fails intermittedly due to a race condition:
>
> qemu:block / io-qcow2-161 ERROR 2.08s exit status 1
> ――――――――――――――――――――――――――――――――――― ✀ ―――――――――――――――――――――――――――――――――――――
> stderr:
> --- tests/qemu-iotests/161.out
> +++ scratch/qcow2-file-161/161.out.bad
> @@ -34,6 +34,8 @@
> *** Commit and then change an option on the backing file
>
> Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=1048576
> +qemu-img: TEST_DIR/t.IMGFMT.base: Failed to get "write" lock
> +Is another process using the image [TEST_DIR/t.IMGFMT.base]?
> Formatting 'TEST_DIR/t.IMGFMT.int', fmt=IMGFMT size=1048576
> backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
> Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
> backing_file=TEST_DIR/t.IMGFMT.int backing_fmt=IMGFMT
> { 'execute': 'qmp_capabilities' }
>
> This test is run right after a previous test, where we've
> killed qemu process which holds the test image open.
> It looks like when the next test is started (with creating
> the image files), old qemu is still running, so we're racing
> with that qemu, and qemu-img is unable to lock the image file
> properly.
>
> We can add some `sleep $little-amount` here, but it is simpler
> and more reliable to just remove the image files, so that new
> ones are created.
>
> Resolves: https://gitlab.com/qemu-project/qemu/-/work_items/2867
> Signed-off-by: Michael Tokarev <[email protected]>
>
> diff --git a/tests/qemu-iotests/161 b/tests/qemu-iotests/161
> index f25effab936..0b8ba0b19e2 100755
> --- a/tests/qemu-iotests/161
> +++ b/tests/qemu-iotests/161
> @@ -106,6 +106,7 @@ echo
> echo "*** Commit and then change an option on the backing file"
> echo
> # Create the images again
> +rm -f -- "$TEST_IMG.base" "$TEST_IMG.int"
> TEST_IMG="$TEST_IMG.base" _make_test_img $IMG_SIZE
> TEST_IMG="$TEST_IMG.int" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT
> _make_test_img -b "$TEST_IMG.int" -F $IMGFMT
This can only work for the file protocol, but the test also supports
fuse, which is now broken.
Kevin
161 fail [19:51:58] [19:52:03] 5.3s output mismatch
(see /home/kwolf/source/qemu/build-clang/scratch/qcow2-fuse-161/161.out.bad)
--- /home/kwolf/source/qemu/tests/qemu-iotests/161.out
+++ /home/kwolf/source/qemu/build-clang/scratch/qcow2-fuse-161/161.out.bad
@@ -33,6 +33,8 @@
*** Commit and then change an option on the backing file
+rm: cannot remove
'/tmp/qemu-iotests-9_5xqdbm/qcow2-fuse-161/fuse-t.qcow2.base': Device or
resource busy
+rm: cannot remove
'/tmp/qemu-iotests-9_5xqdbm/qcow2-fuse-161/fuse-t.qcow2.int': Device or
resource busy
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=1048576
Formatting 'TEST_DIR/t.IMGFMT.int', fmt=IMGFMT size=1048576
backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
backing_file=TEST_DIR/t.IMGFMT.int backing_fmt=IMGFMT
Failures: 161
Failed 1 of 1 iotests
