Re: next-20120313 cpuidle freezes when booting

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On 03/13/2012 11:29 PM, Hugh Dickins wrote:
Hi Stephen,

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.

Usually when booting up (sometimes just after Freeing unused kernel
memory, sometimes random places elsewhere), but occasionally it manages
to get as far as X; doesn't usually manage to complete suspend+resume.

3.3.0-rc6-nex-20120309 behaved similarly; the last I tried before
that was 3.3.0-rc5-next20120227, which was okay.

Bisection led me to "cpuidle: Add common time keeping and irq enabling",
(from the cpuidle-cons tree I think), and reverting that has so far
given me a working system (it's a success if I complete this mail).

Below is the patch I've used to revert it (for other people having
problems with recent linux-next to try); but it's not quite correct,
because you did a merge on conflicting trees there, and I didn't spend
time to unravel all that, just get a working x86 system - since I've
left out some of your merge (in arch/arm/kernel/Makefile and arch/arm/
mach-at91/cpuidle.c), this reversion probably breaks arm as is.

Hi Hugh,

is it possible you give the cpuidle driver your host is using ?

Thanks
  -- Daniel

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