Commit 579a3297 authored by Emil Tsalapatis's avatar Emil Tsalapatis Committed by Tejun Heo
Browse files

selftests/sched_ext: flush stdout before test to avoid log spam 



The sched_ext selftests runner runs each test in the same process,
with each test possibly forking multiple times. When the main runner
has not flushed its stdout, the children inherit the buffered output
for previous tests and emit it during exit. This causes log spam.

Make sure stdout/stderr is fully flushed before each test.

Cc: Ihor Solodrai <ihor.solodrai@linux.dev>
Signed-off-by: default avatarEmil Tsalapatis <emil@etsalapatis.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent f5e1e5ec

tools/testing/selftests/sched_ext/runner.c

+8 −0
Original line number Diff line number Diff line
@@ -46,6 +46,14 @@ static void print_test_preamble(const struct scx_test *test, bool quiet) 
	if (!quiet)

		printf("DESCRIPTION: %s\n", test->description);

	printf("OUTPUT:\n");



	/*

	 * The tests may fork with the preamble buffered

	 * in the children's stdout. Flush before the test

	 * to avoid printing the message multiple times.

	 */

	fflush(stdout);

	fflush(stderr);

}



static const char *status_to_result(enum scx_test_status status)