From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: "Jorge Ramirez Ortiz, HCL Europe" <Jorge.Ramirez-Ortiz@hcl.com>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>
Subject: Re: [Xenomai] accessing process' virtual memory areas from driver
Date: Wed, 25 Jul 2012 11:46:59 +0200 [thread overview]
Message-ID: <500FC093.4070905@xenomai.org> (raw)
In-Reply-To: <4F534D1A615F544D95E57BFD8460658301CBE3E3@GEO-HCLT-UKEVS1.GEO.CORP.HCL.IN>
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.
prev parent reply other threads:[~2012-07-25 9:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-24 19:48 [Xenomai] accessing process' virtual memory areas from driver Jorge Ramirez Ortiz, HCL Europe
2012-07-25 9:46 ` Gilles Chanteperdrix [this message]
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