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Groups > linux.kernel > #1662377
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync |
| Date | 2017-06-09 14:30 +0200 |
| Message-ID | <tQrd7-1sb-13@gated-at.bofh.it> (permalink) |
| References | (5 earlier) <tPQQi-3EL-29@gated-at.bofh.it> <tQaYG-8eD-27@gated-at.bofh.it> <tQdWx-1BJ-3@gated-at.bofh.it> <tQghH-2W1-3@gated-at.bofh.it> <tQr3s-1p7-17@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Fri, Jun 09, 2017 at 12:13:49PM +0000, Levin, Alexander (Sasha Levin) wrote: > On Fri, Jun 09, 2017 at 02:48:57AM +0200, Frederic Weisbecker wrote: > > On Thu, Jun 08, 2017 at 10:13:38PM +0000, Levin, Alexander (Sasha Levin) wrote: > > > On Thu, Jun 08, 2017 at 09:07:05PM +0200, Frederic Weisbecker wrote: > > > > Awesome, these traces have been very helpful! So now I think I get what's going on. > > > > Can you please test the following fix? > > > > > > With the patch, I hit the warning early on boot: > > > > > > [ 1.423727] clocksource: Switched to clocksource kvm-clock > > > [ 1.429326] ------------[ cut here ]------------ > > > [ 1.430234] WARNING: CPU: 1 PID: 0 at kernel/time/tick-sched.c:792 __tick_nohz_idle_enter+0xe1c/0x15c0 > > > > Oh sorry, I inverted some conditional. It warns as soon as the tick is completely stopped > > and not just deferred, which seldom happen on my testbox. > > > > I need to learn programming again. > > > > Here is the fixed version: > > These warnings seem to have gone away, but I've started seeing a new one: > > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 12525 at kernel/time/hrtimer.c:805 hrtimer_forward+0x222/0x3e0 kernel/time/hrtimer.c:805 > Kernel panic - not syncing: panic_on_warn set ... https://lkml.kernel.org/r/20170609104457.GA39907@inn.lkp.intel.com has a very similar splat
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[PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync Frederic Weisbecker <fweisbec@gmail.com> - 2017-06-08 21:10 +0200
[PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-06-09 00:20 +0200
Re: [PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync Frederic Weisbecker <fweisbec@gmail.com> - 2017-06-09 02:50 +0200
Re: [PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-06-09 14:20 +0200
Re: [PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync Peter Zijlstra <peterz@infradead.org> - 2017-06-09 14:30 +0200
Re: [PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync Frederic Weisbecker <fweisbec@gmail.com> - 2017-06-09 15:10 +0200
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