lkml.org 
[lkml]   [2017]   [Jun]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] nohz: Fix spurious warning when hrtimer and clockevent get out of sync
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

\
 
 \ /
  Last update: 2017-06-12 01:47    [W:0.063 / U:0.276 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site