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Date: Wed, 25 Jul 2012 11:46:59 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai] accessing process' virtual memory areas from driver
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To: "Jorge Ramirez Ortiz, HCL Europe" <Jorge.Ramirez-Ortiz@hcl.com>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>

On 07/24/2012 09:48 PM, Jorge Ramirez Ortiz, HCL Europe wrote:

> On a Xenomai multi-threaded application,  I need to access the
> process list of virtual memory areas in an rtdm driver. Since this
> region is protected by mmap_sem, I am unsure how to perform the
> access. Any guidance will be appreciated. thanks Jorge


>>From real-time domain, you can not do it: the mmap_sem data may not be
in a coherent state, so do the vma list.

>>From Linux domain, no problem, just take the mmap_sem.

-- 
                                                                Gilles.