linux-kernel - Re : vm: weird behaviour when munmapping

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Message-ID: <20061117125046.22496.qmail@web23102.mail.ird.yahoo.com>
Date:	Fri, 17 Nov 2006 12:50:46 +0000 (GMT)
From:	moreau francis <francis_moreau2000@...oo.fr>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re : vm: weird behaviour when munmapping

Peter Zijlstra wrote:
> 
> http://lwn.net/Kernel/LDD3/
> 
> Chapter 15. Section 'Virtual Memory Areas'.
> 
> Basically; vm_ops->open() is not called on the first vma. With this
> munmap() you split the area in two, and it so happens the new vma is the
> lower one.
> 

since I did "munmap(0x2aaae000, 1024)" I would say that the the new vma
is the _upper_ one.

lower vma: 0x2aaae000 -> 0x2aaaf000
upper vma: 0x2aaaf000 -> 0x2aab2000

Francis

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