Subject: Re: CONFIG_NO_HZ: missed ticks, stall (keyb IRQ required)
	[2.6.18-rc4-mm1]
From: Thomas Gleixner <tglx@linutronix.de>
Reply-To: tglx@linutronix.de
To: Andreas Mohr <andi@rhlx01.fht-esslingen.de>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org
In-Reply-To: <20061102001838.GA911@rhlx01.hs-esslingen.de>
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	 <20061102001838.GA911@rhlx01.hs-esslingen.de>
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Date: Thu, 02 Nov 2006 08:31:16 +0100
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On Thu, 2006-11-02 at 01:18 +0100, Andreas Mohr wrote:
> You applied a nice lameness filter, by secretly making sure that -dyntick1
> is unavailable and a new -dyntick2 took its place, right? ;)

:)

> It seems we have C2 APIC issues here, from a cursory glance at the log...

Yes, it stops in C2. Probably I was a bit over optimistic with the
detection. Well it detects it, but not without help from the keyboard
operator :(

> Note that it stalls directly after the
> input: AT Translated Set 2 keyboard as /class/input/input0
> line (from that point on it needs additional "support" via keyboard press).

Does it resume normal operation after the "ACPI: lapic on CPU 0 stops in
C2[C2]" message ?

It is easy to fix by marking all AMDs broken again, but I really want to
avoid this.

	tglx


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