[PATCH v3 6/9] selftests: ublk: don't share backing files between ublk servers
From: Caleb Sander Mateos <hidden>
Date: 2025-12-12 17:17:11
Also in:
linux-kselftest, lkml
Subsystem:
kernel selftest framework, the rest, ublk userspace block driver · Maintainers:
Shuah Khan, Linus Torvalds, Ming Lei
stress_04 is missing a wait between blocks of tests, meaning multiple ublk servers will be running in parallel using the same backing files. Add a wait after each section to ensure each backing file is in use by a single ublk server at a time. Signed-off-by: Caleb Sander Mateos <redacted> Reviewed-by: Ming Lei <redacted> --- tools/testing/selftests/ublk/test_stress_04.sh | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/ublk/test_stress_04.sh b/tools/testing/selftests/ublk/test_stress_04.sh
index c0c926ce0539..efa8dc33234b 100755
--- a/tools/testing/selftests/ublk/test_stress_04.sh
+++ b/tools/testing/selftests/ublk/test_stress_04.sh@@ -29,23 +29,25 @@ _create_backfile 1 128M _create_backfile 2 128M ublk_io_and_kill_daemon 8G -t null -q 4 -z --no_ublk_fixed_fd & ublk_io_and_kill_daemon 256M -t loop -q 4 -z --no_ublk_fixed_fd "${UBLK_BACKFILES[0]}" & ublk_io_and_kill_daemon 256M -t stripe -q 4 -z "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" & +wait if _have_feature "AUTO_BUF_REG"; then ublk_io_and_kill_daemon 8G -t null -q 4 --auto_zc & ublk_io_and_kill_daemon 256M -t loop -q 4 --auto_zc "${UBLK_BACKFILES[0]}" & ublk_io_and_kill_daemon 256M -t stripe -q 4 --auto_zc --no_ublk_fixed_fd "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" & ublk_io_and_kill_daemon 8G -t null -q 4 -z --auto_zc --auto_zc_fallback & + wait fi if _have_feature "PER_IO_DAEMON"; then ublk_io_and_kill_daemon 8G -t null -q 4 --auto_zc --nthreads 8 --per_io_tasks & ublk_io_and_kill_daemon 256M -t loop -q 4 --auto_zc --nthreads 8 --per_io_tasks "${UBLK_BACKFILES[0]}" & ublk_io_and_kill_daemon 256M -t stripe -q 4 --auto_zc --nthreads 8 --per_io_tasks "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" & ublk_io_and_kill_daemon 8G -t null -q 4 -z --auto_zc --auto_zc_fallback --nthreads 8 --per_io_tasks & + wait fi -wait _cleanup_test "stress" _show_result $TID $ERR_CODE
--
2.45.2