On Thursday, October 20, 2016 09:41:34 AM Sedat Dilek wrote: > On Wed, Oct 19, 2016 at 10:55 PM, Rafael J. Wysocki <r...@rjwysocki.net> > wrote: > > On Wednesday, October 19, 2016 06:59:35 PM Jörg Otte wrote: > >> 2016-10-19 17:29 GMT+02:00 Linus Torvalds <torva...@linux-foundation.org>: > >> > On Wed, Oct 19, 2016 at 4:07 AM, Jörg Otte <jrg.o...@gmail.com> wrote: > >> >> > >> >> Additional info: I usally use schedutil governor. > >> >> If I switch to performance governor problems go away. > >> >> Maybe a cpufreq problem? > >> > > >> > Oh, I completely misread the original bug report, and then didn't read > >> > your confirmation email right. > >> > > >> > I thought you had a slower build of the different kernels (when > >> > building on the same kernel), and that the _build_ itself had slowed > >> > down for some reason. But you're actually saying that doing the _same_ > >> > build actually takes longer when running on 4.9-rc1. > >> > >> Exactly! > >> > >> Btw: ondemand governor is also good. > >> > >> > There are a few small cpufreq changes there in between commit > >> > 29fbff8698fc (that you reported was fine - please tell me I got _that_ > >> > right, at least?) and 4.9-rc1. > >> > >> Perfect! That's what I mean. > >> > >> > Adding Rafael to the cc. > >> > > >> > That said, none of them look all that likely to me. It *would* be good > >> > if you could bisect it a bit (perhaps not fully, but a couple of > >> > bisection steps to narrow down what area it is). > >> > >> I try that tomorrow. > > > > Well, please try commit ef98988ba369 (Merge tag 'pm-extra-4.9-rc1' of > > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm) which is the > > merge introducing the late cpufreq changes. If the issue is there, please > > try to revert commit 899bb6642f2a (cpufreq: skip invalid entries when > > searching > > the frequency) which is the only cpufreq one that may matter for the > > schedutil > > governor (and I have one fix for that commit queued up already). > > > > Is "cpufreq: fix overflow in cpufreq_table_find_index_dl()" the fix > you are speaking of? > > Fixes: 899bb6642f2a (cpufreq: skip invalid entries when searching the > frequency)
Yes. > If yes, can you add a hint in the commit message describing the impact > like here a slow-down of building a linux-kernel. > With a reference to this ML-thread? I will if that turns out to be the case. Thanks, Rafael
