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To: "Jan Beulich" <jbeulich@novell.com>
Cc: <mingo@elte.hu>, <tglx@linutronix.de>, <hpa@zytor.com>,
       <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH, resend] i386: also limit NODES_HIGH_SHIFT here
From: Andi Kleen <andi@firstfloor.org>
References: <49B90F12.76E4.0078.0@novell.com>
Date: Thu, 12 Mar 2009 14:29:37 +0100
In-Reply-To: <49B90F12.76E4.0078.0@novell.com> (Jan Beulich's message of "Thu, 12 Mar 2009 12:33:06 +0000")
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"Jan Beulich" <jbeulich@novell.com> writes:

> Impact: configuration bug fix
>
> Just like for x86-64, the range of widths valid for NODE_SHIFT is not
> unbounded. The upper bound 64-bit uses is definitely also an upper
> bound for 32-bit.

I think that's actually obsolete, there's no real 128 nodes limit.

The only limit used to be 256 nodes because you can't have more nodes
than CPUs, but that's obsolete with x2apic.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.