Messages in this thread | | | Date | Tue, 12 Jul 2016 10:04:59 -0700 | From | Viresh Kumar <> | Subject | Re: [PATCH v12 0/3] printk: Make printk() completely async |
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On 12-07-16, 17:59, Petr Mladek wrote: > On Mon 2016-07-11 12:25:11, Viresh Kumar wrote: > > We were also screwed because of the problem this thread is trying to solve, > > which I posted last week [1]. > > > > And then I found this thread which fixed my issue, thanks a lot guys :) > > > > Tested-by: Viresh Kumar <viresh.kumar@linaro.org> > > > > Though, I would also like to mention one unwanted thing that happened on > > my setup :) > > > > [ 12.874909] sched: RT throttling activated for rt_rq ffffffc0ac13fcd0 (cpu 0) > > [ 12.874909] potential CPU hogs: > > [ 12.874909] printk (292) > > > > On my system, the excessive printing happens during suspend/resume and this > > happened after all the non-boot CPUs were offlined. So, only CPU 0 was left and > > that was doing printing for a long time and so these errors :) > > > > It resulted in missing some print messages eventually as the scheduler probably > > didn't schedule this thread for sometime after that. > > > > Will it be fine to get the priority of this kthread to a somewhat lower value, > > etc ? > > I think that this patch helped only by chance.
Sorry got confused a bit here..
Which patch are you taking about here ? As you replied below my message, I believe that you are talking about the 3 patches that were posted in this series. But the rest of your comment looks like the fourth fixup patch that Sergey shared :)
So, the fixup patch doesn't fix any issues in my case, to make it clear. I still have my system hanging somewhere.
> I am still scratching my head about the problem fixed by this patch > and also about suspend problems.
:)
-- viresh
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