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Date: Thu, 8 Apr 2004 11:53:27 +1000
From: David Gibson <david@gibson.dropbear.id.au>
To: Zoltan.Menyhart@bull.net
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       Anton Blanchard <anton@samba.org>, Paul Mackerras <paulus@samba.org>,
       linuxppc64-dev@lists.linuxppc.org
Subject: Re: RFC: COW for hugepages
Message-ID: <20040408015327.GB20320@zax>
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	Zoltan.Menyhart@bull.net, Andrew Morton <akpm@osdl.org>,
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On Wed, Apr 07, 2004 at 11:00:43AM +0200, Zoltan Menyhart wrote:
> David,
> 
> Why not just add a flag for a VMA telling if you want / do not want to
> copy it on "fork()" ? E.g.:
> 
> dup_mmap():
> 
> 	for (= current->mm->mmap ; mpnt ; mpnt = mpnt->vm_next) {
> 
> 		if (mpnt->vm_flags & VM_HUGETLB_DONT_COPY)
> 			<do nothing>
> 	}
> 

Um.. why would that be useful?

-- 
David Gibson			| For every complex problem there is a
david AT gibson.dropbear.id.au	| solution which is simple, neat and
				| wrong.
http://www.ozlabs.org/people/dgibson
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