linux-kernel - Re: [rfc 08/45] cpu alloc: x86 support

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Message-Id: <200711202151.58310.ak@suse.de>
Date:	Tue, 20 Nov 2007 21:51:58 +0100
From:	Andi Kleen <ak@...e.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Christoph Lameter <clameter@....com>, akpm@...ux-foundation.org,
	travis@....com, Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel@...r.kernel.org
Subject: Re: [rfc 08/45] cpu alloc: x86 support


> This limitation shouldn't apply to the percpu area, since gs_base can be 
> pointed anywhere in the address space -- in effect we're always indirect.

The initial reference copy of the percpu area has to be addressed by
the linker.

Hmm, in theory since it is not actually used by itself I suppose you could 
move it into positive space.

-Andi
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