Messages in this thread Patch in this message | | | From | Ani Sinha <> | Subject | [PATCH v2] sched/clock: print a log when the sched clock is marked unstable | Date | Wed, 7 Jul 2021 16:26:59 +0530 |
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When the sched clock transitions from stable to unstable and vice versa, a kernel log is printed. When the sched clock is marked explicitly as unstable, make __clear_sched_clock_stable() emit a warning log. It is useful for example in understanding why a certain feature like NOHZ that depends on availability of a stable sched clock, is not available.
Signed-off-by: Ani Sinha <ani@anisinha.ca> --- kernel/sched/clock.c | 1 + 1 file changed, 1 insertion(+)
Changelog: V1: original patch v2: print pr_warn from __clear_sched_clock_stable instead. Commit log updated with proper prefix and wording.
diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c index c2b2859ddd82..99484fec0335 100644 --- a/kernel/sched/clock.c +++ b/kernel/sched/clock.c @@ -183,6 +183,7 @@ static void __clear_sched_clock_stable(void) return; tick_dep_set(TICK_DEP_BIT_CLOCK_UNSTABLE); + pr_warn("sched_clock: Marking unstable.\n"); schedule_work(&sched_clock_work); } -- 2.25.1
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