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Date: Tue, 06 Mar 2007 10:17:59 -0800
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: Rusty Russell <rusty@rustcorp.com.au>
CC: lkml - Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Zachary Amsden <zach@vmware.com>,
       Jeremy Fitzhardinge <jeremy@xensource.com>, Ingo Molnar <mingo@elte.hu>,
       Andrew Morton <akpm@linux-foundation.org>, Andi Kleen <ak@suse.de>
Subject: Re: [PATCH 6/8] Allow per-cpu variables to be page-aligned
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Rusty Russell wrote:
> Xen wants page-aligned GDT (and PDA must not cross a page-boundary,
> but that doesn't happen at the moment since it's so close to start of
> page).  Let's allow page-alignment in general for per-cpu data.
>
> Because larger alignments can use more room, we increase the max
> per-cpu memory to 64k rather than 32k: it's getting a little tight.
>
> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
>
> diff -r 213b1ec27001 arch/alpha/kernel/vmlinux.lds.S
> --- a/arch/alpha/kernel/vmlinux.lds.S	Tue Mar 06 19:01:59 2007 +1100
> +++ b/arch/alpha/kernel/vmlinux.lds.S	Tue Mar 06 19:02:03 2007 +1100
> @@ -69,7 +69,7 @@ SECTIONS
>    . = ALIGN(8);
>    SECURITY_INIT
>  
> -  . = ALIGN(64);
> +  . = ALIGN(8192);
>   

Isn't there a PAGE_SIZE we can use here?  PAGE_SIZE_asm?
(ditto all archs)

    J