Messages in this thread | | | Date | Thu, 27 Oct 2016 16:53:48 +0200 | From | Petr Mladek <> | Subject | Re: [PATCH 3/3] thermal/intel_powerclamp: Convert to CPU hotplug state |
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On Mon 2016-10-24 09:55:29, Jacob Pan wrote: > On Mon, 24 Oct 2016 17:48:07 +0200 > Petr Mladek <pmladek@suse.com> wrote: > > > On Fri 2016-10-21 13:21:18, Jacob Pan wrote: > > > On Mon, 17 Oct 2016 14:32:52 +0200 > > > Petr Mladek <pmladek@suse.com> wrote: > > > > > > > From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> > > > > > > > Hi Sebastian, > > > I applied this patchset on 4.9-rc1 and run some cpu online/offline > > > loops test while injecting idle, e.g. 25%. I got system hang after a > > > few cycles. Still looking into root cause. > > > > You might need the patch > > ("sched/fair: Fix sched domains NULL deference in > > select_idle_sibling()") from linux-tip, see > > https://lkml.kernel.org/r/tip-9cfb38a7ba5a9c27c1af8093fb1af4b699c0a441@git.kernel.org > > > > I have mentioned it in the cover letter. I am sorry if it was not > > visible enough. > Thanks for point it out again, I missed it. > > Now rc2 has this fix so I tried again cpuhp seems to work well now. > > However, I found suspend to ram does not work with this patchset. Have > you tested it with "echo mem > /sys/power/state" while doing idle > injection? > It fails to enter s3 on my system.
Hmm, I haven't tested the system suspend. I am sorry but I am snowed under some other tasks this week and will be on the Plumbers conference the next week. I hope that I will have some time to look at it then.
In each case, I wonder if the problem is caused by the conversion to the kthread worker or by the CPU hotplug state conversion.
Best Regards, Petr
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