linux-kernel - Re: 2.6.20-rc6-mm3

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Message-ID: <20070206225650.GA14853@elte.hu>
Date:	Tue, 6 Feb 2007 23:56:50 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.20-rc6-mm3


* Daniel Walker <dwalker@...sta.com> wrote:

> On Tue, 2007-02-06 at 23:08 +0100, Ingo Molnar wrote:
> 
> > sorry but that's precisely what your suggestion above results in:
> 
> I'm not trying to suggest we "fake" anything. Your just 
> misunderstanding me.. [...]

as i pointed it out in the previous mail, the problem is that what you 
suggested results in preisely that - a count in the wrong place:

> If we change the current "timer" entry to be listed as "lapic-timer" 
> and not "IO-APIC-edge" (or one of the other names) and replace it with 
> the count from LOC

changing the current 'timer' entry (which is line 2 of /proc/interrupts) 
to be 'listed as lapic-timer' and to 'replace it with the count from 
LOC' is faking a count in a line where nothing like that should be.

the kernel simply displays reality: IRQ#0 isnt increasing because it's 
not used, and LOC (local apic timers) is increasing.

	Ingo
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