lkml.org 
[lkml]   [2019]   [Jan]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Regression in v5.0-rc1 with autosuspend hrtimers
* Vincent Guittot <vincent.guittot@linaro.org> [190108 16:42]:
> On Tue, 8 Jan 2019 at 16:53, Tony Lindgren <tony@atomide.com> wrote:
> > Hmm so could it be that we now rely on timers that that may
> > not be capable of waking up the system from idle states with
> > hrtimer?
>
> With nohz and hrtimer enabled, timer relies on hrtimer to generate
> the tick so you should use the same interrupt.

OK yeah looks like that part is working just fine.

Adding some printks and debugging over ssh, looks like
omap8250_runtime_resume() gets called just fine based on a wakeirq,
but then omap8250_runtime_suspend() runs immediately instead of
waiting for the three second timeout.

Lowering the autosuspend_delay_ms to 2100 ms makes things work again.
Anything higher than 2200 ms seems to somehow time out immediately
now :)

Regards,

Tony

\
 
 \ /
  Last update: 2019-01-08 22:38    [from the cache]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and my Meterkast|Read the blog