linux-kernel - Re: [RFC 00/15] x86_64: Optimize percpu accesses

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Message-ID: <487677F0.4000404@goop.org>
Date:	Thu, 10 Jul 2008 13:58:24 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Christoph Lameter <cl@...ux-foundation.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Ingo Molnar <mingo@...e.hu>, Mike Travis <travis@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses

Christoph Lameter wrote:
> Jeremy Fitzhardinge wrote:
>
>   
>> What other trouble?  It works fine.
>>     
>
> Somehow you performed a mind wipe to get rid of all memory of the earlier messages?
>   

Percpu on i386 hasn't been a point of discussion.  It works fine, and 
has been working fine for a long time.  The same mechanism would work 
fine on x86-64.  Its only "issue" is that it doesn't support the broken 
gcc abi for stack-protector.

The problem is all zero-based percpu on x86-64.

    J
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