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Date: Wed, 07 Apr 2004 11:00:43 +0200
From: Zoltan Menyhart <Zoltan.Menyhart_AT_bull.net@nospam.org>
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To: David Gibson <david@gibson.dropbear.id.au>
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
References: <20040407074239.GG18264@zax>
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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>
	}

Regards,

Zoltán Menyhárt