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

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Date:	Wed, 09 Jul 2008 13:53:57 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Mike Travis <travis@....com>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>, Jack Steiner <steiner@....com>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses

Jeremy Fitzhardinge wrote:
> Christoph Lameter wrote:
>> Maybe I misunderstood but it seems that you proposed to convert
>> individual members of the pda structure (which uses GS) to per cpu
>> variables (which without this patchset cannot use GS).
>>   
> 
> I have no objections to parts 1-3 of the patchset.  It's just 4-15,
> which does the mechanical conversion.

Well yes I agree these could be better if the fields would be moved out of the pda
structure itself but then it wont be mechanical anymore and require more
review. But these are an important step because they allow us to get rid of the
pda operations that do not exist for 32 bit.

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