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Date: Fri, 11 Nov 2011 01:47:52 +0100 From: Andreas Bombe <aeb@...ian.org> To: Ingo Molnar <mingo@...e.hu> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-kernel@...r.kernel.org Subject: Re: [REGRESSION] perf merge breaks resume from standby, bisected On Thu, Nov 10, 2011 at 03:53:20PM +0100, Ingo Molnar wrote: > > * Andreas Bombe <aeb@...ian.org> wrote: > > > I found that resuming from suspend to memory stopped working with the > > recent merges to mainline after 3.1. I have observed different modes of > > failure even with the same version. Most often I just get the blinking > > caps/scroll lock LEDs on the keyboard and no video output. > > > > Sometimes I get the normal text output from a resume ending with an oops > > dump. It has been mostly NULL pointer dereferences, but I think there > > was a scheduling in atomic context at one time. I have a photo of the > > NULL deref on the latest kernel attached, according to gdb the IP points > > to the return statement of the event_sched_out() function. > > > > Anyway, I bisected the problem down to 144060f "perf: Add PM notifiers > > to fix CPU hotplug races". The hardware is a Core 2 Duo E8500 on an Asus > > P5Q, config attached. > > v3.2-rc1 should have this resolved, the commit got reverted. Thanks, but I already knew since I saw that thread. FWIW, the revert did fix the problem. -- Andreas Bombe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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