linux-kernel - Re: Reading /dev/mem by dd

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Message-ID: <bec9a5871002160035v63cce8ck9ecb9252b2f162a6@mail.gmail.com>
Date:	Tue, 16 Feb 2010 10:35:40 +0200
From:	Nameer Yarkon <nameer.yarkon@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Andi Kleen <andi@...stfloor.org>,
	Robert Hancock <hancockrwd@...il.com>,
	"Anton D. Kachalov" <mouse@...c.ru>, linux-kernel@...r.kernel.org
Subject: Re: Reading /dev/mem by dd

On Thu, Nov 12, 2009 at 8:13 PM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>> Is that the only valid use of /dev/mem, or even its main use?
>
> These days it is the primary use. Things like X11 were historically
> probably the biggest user of it, and things like LRMI sometimes need that
> sort of stuff.

how does X11 get now direct access to the physical memory (instead of
/dev/mem) ?
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