Messages in this thread Patch in this message | | | Date | Mon, 24 Apr 2017 10:01:04 -0700 | From | tip-bot for Frederic Weisbecker <> | Subject | [tip:timers/urgent] nohz: Print more debug info in tick_nohz_stop_sched_tick() |
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Commit-ID: 098991fccfc7c0dd5fdfc6ed2ed965ad80f14be5 Gitweb: http://git.kernel.org/tip/098991fccfc7c0dd5fdfc6ed2ed965ad80f14be5 Author: Frederic Weisbecker <fweisbec@gmail.com> AuthorDate: Mon, 24 Apr 2017 16:04:37 +0200 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Mon, 24 Apr 2017 16:27:09 +0200
nohz: Print more debug info in tick_nohz_stop_sched_tick()
Print more debug info when triggering this warning:
> ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 0 at kernel/time/tick-sched.c:874 __tick_nohz_idle_enter+0x461/0x490
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: James Hartsock <hartsjc@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tim Wright <tim@binbash.co.uk> Link: http://lkml.kernel.org/r/20170424140436.GD21353@lerouge Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/time/tick-sched.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index be7ca4d..b2df684 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -789,6 +789,7 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, goto out; WARN_ON_ONCE(1); + printk_once("basemono: %llu ts->next_tick: %llu dev->next_event: %llu\n", basemono, ts->next_tick, dev->next_event); } /*
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