patches/old/lib-make-the-ratelimit-test-more-reliable.patch

From: Petr Mladek <pmladek@suse.com>
Subject: lib: make the ratelimit test more reliable
Date: Wed, 9 Jul 2025 11:03:34 -0700

The selftest fails most of the times when running in qemu with a kernel
configured with CONFIG_HZ = 250:

>  test_ratelimit_smoke: 1 callbacks suppressed
>  # test_ratelimit_smoke: ASSERTION FAILED at lib/tests/test_ratelimit.c:28
>                    Expected ___ratelimit(&testrl, "test_ratelimit_smoke") == (false), but
>                        ___ratelimit(&testrl, "test_ratelimit_smoke") == 1 (0x1)
>                        (false) == 0 (0x0)

Try to make the test slightly more reliable by calling the problematic
ratelimit in the middle of the interval.

Link: https://lkml.kernel.org/r/20250709180335.1716384-2-paulmck@kernel.org
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Jon Pan-Doh <pandoh@google.com>
Cc: Karolina Stolarek <karolina.stolarek@oracle.com>
Cc: Kuniyuki Iwashima <kuniyu@amazon.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/tests/test_ratelimit.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/lib/tests/test_ratelimit.c~lib-make-the-ratelimit-test-more-reliable
+++ a/lib/tests/test_ratelimit.c
@@ -24,19 +24,19 @@ static void test_ratelimit_smoke(struct
 	test_ratelimited(test, true);
 	test_ratelimited(test, false);
 
-	schedule_timeout_idle(TESTRL_INTERVAL - 40);
+	schedule_timeout_idle(TESTRL_INTERVAL / 2);
 	test_ratelimited(test, false);
 
-	schedule_timeout_idle(50);
+	schedule_timeout_idle(TESTRL_INTERVAL * 3 / 4);
 	test_ratelimited(test, true);
 
 	schedule_timeout_idle(2 * TESTRL_INTERVAL);
 	test_ratelimited(test, true);
 	test_ratelimited(test, true);
 
-	schedule_timeout_idle(TESTRL_INTERVAL - 40);
+	schedule_timeout_idle(TESTRL_INTERVAL / 2 );
 	test_ratelimited(test, true);
-	schedule_timeout_idle(50);
+	schedule_timeout_idle(TESTRL_INTERVAL * 3 / 4);
 	test_ratelimited(test, true);
 	test_ratelimited(test, true);
 	test_ratelimited(test, true);
_