On Mon, 24 Oct 2016 17:48:07 +0200 Petr Mladek <pmla...@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 <pmla...@suse.com> wrote: > > > > > From: Sebastian Andrzej Siewior <bige...@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-9cfb38a7ba5a9c27c1af8093fb1af4b699c0a...@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.