linux-kernel - Re: [PATCH] - Increase MAX

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Message-ID: <20080416184543.GD3722@elte.hu>
Date:	Wed, 16 Apr 2008 20:45:43 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jack Steiner <steiner@....com>
Cc:	tglx@...utronix.de, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] - Increase MAX_APICS for large configs


* Jack Steiner <steiner@....com> wrote:

> Increase the maximum number of apics when running very large 
> configurations. This patch has no affect on most systems.
> 
> Signed-off-by: Jack Steiner <steiner@....com>
> 
> I think this area of the code will be substantially changed when the 
> full x2apic patch is available. In the meantime, this seems like an 
> acceptible alternative. The patch has no effect on any 32-bit kernel. 
> It adds ~4k to the size of 64-bit kernels but only if NR_CPUS > 255.

ugly ... but well - applied. What's the static size cost of 64K APICs?

	Ingo
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