linux-kernel - Re: [PATCH 1/6] mm: use mm_struct to resolve gate vma's in __get_user

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Message-ID: <20110309123834.GA8236@fibrous.localdomain>
Date:	Wed, 9 Mar 2011 07:38:34 -0500
From:	Stephen Wilson <wilsons@...rt.ca>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Roland McGrath <roland@...hat.com>,
	Matt Mackall <mpm@...enic.com>,
	David Rientjes <rientjes@...gle.com>,
	Nick Piggin <npiggin@...nel.dk>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Mel Gorman <mel@....ul.ie>, Ingo Molnar <mingo@...e.hu>,
	Michel Lespinasse <walken@...gle.com>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] mm: use mm_struct to resolve gate vma's in
	__get_user_pages

On Wed, Mar 09, 2011 at 06:06:17AM +0000, Al Viro wrote:
> On Wed, Mar 09, 2011 at 02:19:30PM +0900, KOSAKI Motohiro wrote:
> 
> > Hmm..
> > Is this works? In exec() case task has two mm, old and new-borned. tsk has
> > no enough information to detect gate area if 64bit process exec 32bit process
> > or oppsite case. On Linux, 32bit and 64bit processes have perfectly different
> > process vma layout.
> > 
> > Am I missing something?
> 
> Patch series refered to in [0/6] ;-)  FWIW, that would probably be better
> off as one mail thread - would be easier to find.

OK.  After the first half has gone thru review I will respin (with changes)
as a single series.  I was actually hoping the split would make review a
little bit easier, but in retrospect I could have accomplished the same
thing by simply pointing out the two halves in the series "cover
letter".


-- 
steve

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