Date: Thu, 7 Dec 2006 22:44:34 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
       Mike Galbraith <efault@gmx.de>, Clark Williams <williams@redhat.com>,
       Sergei Shtylyov <sshtylyov@ru.mvista.com>,
       Thomas Gleixner <tglx@linutronix.de>,
       Giandomenico De Tullio <ghisha@email.it>
Subject: Re: v2.6.19-rt6, yum/rpm
Message-ID: <20061207214434.GA29357@elte.hu>
References: <20061205171114.GA25926@elte.hu> <1165524358.9244.33.camel@cmn3.stanford.edu> <20061207205819.GA21953@elte.hu> <1165526445.27217.59.camel@laptopd505.fenrus.org>
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* Arjan van de Ven <arjan@infradead.org> wrote:

> > i think it's the UP vs. SMP difference. We are chasing some SMP 
> > latencies right now that trigger on boxes that have deeper C sleep 
> > states. idle=poll seems to work around those problems.
> 
> well C-states do cause latencies... as advertized in the 
> /proc/acpi/processor/CPU0/power file.

no, this is a plain logic bug somewhere, not a hardware latency. 
Sometimes the latency is in the seconds range, etc.

	Ingo
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