linux-kernel - Re: Linux 2.6.26-rc1 - pgtable_32.c:178 pmd

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Date:	Tue, 6 May 2008 17:04:32 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	Jeff Chua <jeff.chua.linux@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Gabriel C <nix.or.die@...glemail.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: Linux 2.6.26-rc1 - pgtable_32.c:178 pmd_bad


* Hugh Dickins <hugh@...itas.com> wrote:

> > we have an strace/ptrace fix pending in x86.git - but that should 
> > not affect khelper.
> 
> No, it comes from your pmd_bad_v1/pmd_bad_v2 debug patch, which Linus 
> objected to, yet has crept into his tree nonetheless.

hm, the main objection was about whether to turn PAGE_SIZE from unsigned 
into signed though - and that we didnt do.

regarding the mm/memory.c changes you did - that's something i proposed 
before but didnt really feel positive about it because it affected every 
architecture.

lets sort it out.

> I looked back through the mails and logs on that, and disagree with 
> most of what was done there.  Here's my pending fix below, but I've 
> not yet tested whether it builds correctly on all relevant configs, 
> nor whether my pmd_huge does what's intended, nor written the 
> necessary comments, nor worked out the Cc list - I'm going out for a 
> short while, all those will follow later, this sent as a heads up to 
> relieve Jeff from bisecting.
> 
> Not-yet-Signed-off-by: Hugh Dickins <hugh@...itas.com>

i've thrown this into my queue to test it some more. I wont complain if 
it breaks :)

	Ingo
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