linux-kernel - Re: [Xen-devel] 2.6.27 - SMP enabled, but only 1 CPU

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Message-ID: <49136168.3040604@goop.org>
Date:	Thu, 06 Nov 2008 13:28:08 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Ian Campbell <Ian.Campbell@...rix.com>,
	"Christopher S. Aker" <caker@...shore.net>,
	xen devel <xen-devel@...ts.xensource.com>,
	Jan Beulich <jbeulich@...ell.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] 2.6.27 - SMP enabled, but only 1 CPU

Ingo Molnar wrote:
> a "cleanup" impact line is only added if the change is not intended to 
> have any side-effects whatsoever.
>
> We can drop it but it would be really nice to figure out what's going 
> on. In a very quick late-night look i cannot see anything particularly 
> weird about it, but based on the type of changes it does there are 
> three leading candidates: lost high 32 bits, zero extend problem, or 
> incorrect types.
>   

Interestingly, the Xen code appears to be the *only* user of pud_page - 
and only via pgd_page in PAE mode.

    J
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