Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756744Ab0BPJDx (ORCPT ); Tue, 16 Feb 2010 04:03:53 -0500 Received: from mail-bw0-f213.google.com ([209.85.218.213]:63595 "EHLO mail-bw0-f213.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756409Ab0BPJDu (ORCPT ); Tue, 16 Feb 2010 04:03:50 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=K4SbW1di1ViYk+yDbc+0wbD2+CbS3DQ3VGM4Pcit6jPcbJLSCYIXOuAGaBUzUUqLe2 69zn7lbrjQA1BC9SZ/W79n8bv6tX39DNEj6nWHz8dv4n2jtDBjIK4PM3lLAe0K9Py6nU sBscRWFTXWYaG3mXJBKEklGNNCF3rBnTX3xx0= MIME-Version: 1.0 In-Reply-To: <20100216084110.GK21783@one.firstfloor.org> References: <20100216084110.GK21783@one.firstfloor.org> Date: Tue, 16 Feb 2010 11:03:49 +0200 Message-ID: Subject: Re: Reading /dev/mem by dd From: Nameer Yarkon To: Andi Kleen Cc: Alan Cox , Henrique de Moraes Holschuh , Robert Hancock , "Anton D. Kachalov" , linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 639 Lines: 22 On Tue, Feb 16, 2010 at 10:41 AM, Andi Kleen wrote: > Modern X does it through kernel modules (DRM, GEM etc.) is it done by an mmap call (to the device) ? > One reason it's needed to do it this way is IOMMUs. why would it care about IOMMUs ? do graphic cards manipulate the memory too ? thank you! > > -Andi > > -- > ak@linux.intel.com -- Speaking for myself only. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/