linux-kernel - Re: [x86] Stricter check in follow_huge

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Message-ID: <20080327081318.GA15626@elte.hu>
Date:	Thu, 27 Mar 2008 09:13:18 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Christoph Lameter <clameter@....com>
Cc:	linux-kernel@...r.kernel.org, Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [x86] Stricter check in follow_huge_addr()


* Christoph Lameter <clameter@....com> wrote:

> From: Christoph Lameter <clameter@....com>
> Subject: Compound Pages: Stricter check in follow_huge_addr
> 
> The first page of the compound page is determined in 
> follow_huge_addr() but then PageCompound() only checks if the page is 
> part of a compound page. PageHead() allows checking if this is indeed 
> the first page of the compound.

thanks Christoph, applied.

btw., what type of real-life problem does this address? Did this trigger 
somewhere? (if yes, do you have any URLs i could put into the 
changelog?)

	Ingo
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