linux-kernel - Re: [PATCH] rmap: Fix Bugzilla Bug #5493

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Message-ID: <20100306144422.GI17078@lisa.in-ulm.de>
Date:	Sat, 6 Mar 2010 15:44:22 +0100
From:	Christian Ehrhardt <uni@...e.de>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Rik van Riel <riel@...hat.com>, Christian Ehrhardt <lk@...e.de>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	linux-mm@...ck.org
Subject: Re: [PATCH] rmap: Fix Bugzilla Bug #5493


Hi,

On Sat, Mar 06, 2010 at 03:00:48AM +0100, Johannes Weiner wrote:
> What's with expand_stack()?  This changes the radix index or the heap
> index, depending on the direction in which the stack grows, but it
> does not adjust the tree and so its order is violated.  Did you make
> sure that this is fine?

Ooops! Thanks for the hint. Not only expand stack but also vma_adjust
(aka vma_merge) need to update the tree, I guess.

However, it is somewhat odd that this did not trigger anything in
my tests. I guess I have to come up with a testcase that properly
checks this case.

      regards   Christian

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