Messages in this thread | | | Date | Wed, 14 Mar 2012 13:30:57 -0700 (PDT) | From | Hugh Dickins <> | Subject | Re: next-20120313 cpuidle freezes when booting |
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On Wed, 14 Mar 2012, Daniel Lezcano wrote: > On 03/14/2012 08:03 PM, Hugh Dickins wrote: > > On Wed, 14 Mar 2012, Daniel Lezcano wrote: > > > On 03/13/2012 11:29 PM, Hugh Dickins wrote: > > > > > > > > Yesterday's 3.3.0-rc7-next-20120313 gives me unpredictable freezes > > > > on x86_64, on a ThinkPad T420s - I've not dared it on more machines. > > > > > > is it possible you give the cpuidle driver your host is using ? > > > > "grep IDLE .config" tells me: > > > > CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y > > CONFIG_ARCH_HAS_DEFAULT_IDLE=y > > CONFIG_CPU_IDLE=y > > CONFIG_CPU_IDLE_GOV_LADDER=y > > CONFIG_CPU_IDLE_GOV_MENU=y > > CONFIG_INTEL_IDLE=y > > # CONFIG_I7300_IDLE is not set > > > > but I've a feeling that isn't what you need to know. > > Thanks for these informations, I forgot to ask you for them. > By the way, do you have CONFIG_ARCH_HAS_CPU_RELAX ?
Yes.
> > > Is there some /proc or /sys file I can read to tell you? > > Yes, the content of /sys/devices/system/cpu/cpuidle/current_driver
intel_idle
> and /sys/devices/system/cpu/cpuidle/current_governor_ro
menu
> > > Though if it's something that changes dynamically, then what > > I read now might not be what it would say when things go wrong. > > No, that won't change, so the information should be enough for me to find the > code path where the regression is. > > > I expect you've realized by now, I haven't a clue about cpuidle > > drivers: I hadn't even realized that idleness needs a driver. > > No problem, thanks for git bisecting and find the culprit :)
Thank you - let me know if you've something you'd like me to try.
Hugh
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