linux-kernel - Re: [PATCH 25/25] [PATCH] add paravirtualization support for x86

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Date:	Thu, 09 Aug 2007 00:12:50 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Glauber de Oliveira Costa <glommer@...il.com>
CC:	Glauber de Oliveira Costa <gcosta@...hat.com>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	rusty@...tcorp.com.au, ak@...e.de, mingo@...e.hu,
	chrisw@...s-sol.org, avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, lguest@...abs.org,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 25/25] [PATCH] add paravirtualization support for x86_64

Glauber de Oliveira Costa wrote:
> On 8/9/07, Jeremy Fitzhardinge <jeremy@...p.org> wrote:
>   
>>> Does it really matter?
>>>
>>>       
>> Well, yes, if alignment is an issue.
>>     
> Of course, But the question rises from the context that they are both
> together at the beginning. So they are not making anybody non-aligned.
> Then the question: Why would putting it in the end be different to
> putting them _together_, aligned at the beginning ?
>   

Well, the point is that if you add new ones then alignment may be an
issue.  Putting them at the end (with a comment explaining why they're
there) will make it more robust.  Though splitting them into their own
sub-structure would probably be better.

Hm.  So x86-64 doesn't make 64-bit pointers be 64-bit aligned?

    J
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