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Date: Mon, 3 May 2010 09:41:20 -0700 (PDT)
From: Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 1/2] mm: Take all anon_vma locks in anon_vma_lock
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To: Rik van Riel <riel@redhat.com>
Cc: akpm@linux-foundation.org, Mel Gorman <mel@csn.ul.ie>, Linux-MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>, Minchan Kim <minchan.kim@gmail.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Andrea Arcangeli <aarcange@redhat.com>, Christoph Lameter <cl@linux.com>
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On Mon, 3 May 2010, Rik van Riel wrote:
> 
> Both the page migration code and the transparent hugepage patches expect
> 100% reliable rmap lookups and use page_lock_anon_vma(page) to prevent
> races with mmap, munmap, expand_stack, etc.

Pretty much same comments as for the other one. Why are we pandering to 
the case that is/should be unusual?

		Linus

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