From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1M9JoH-0007uU-5Z
	for qemu-devel@nongnu.org; Wed, 27 May 2009 10:08:49 -0400
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1M9JoC-0007u2-K6
	for qemu-devel@nongnu.org; Wed, 27 May 2009 10:08:48 -0400
Received: from [199.232.76.173] (port=41045 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1M9JoC-0007tz-GR
	for qemu-devel@nongnu.org; Wed, 27 May 2009 10:08:44 -0400
Received: from e7.ny.us.ibm.com ([32.97.182.137]:33916)
	by monty-python.gnu.org with esmtps
	(TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60)
	(envelope-from <aliguori@us.ibm.com>) id 1M9JoC-0007S2-2X
	for qemu-devel@nongnu.org; Wed, 27 May 2009 10:08:44 -0400
Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236])
	by e7.ny.us.ibm.com (8.13.1/8.13.1) with ESMTP id n4RDv8Iq015007
	for <qemu-devel@nongnu.org>; Wed, 27 May 2009 09:57:08 -0400
Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215])
	by d01relay04.pok.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id
	n4RE8gP2253784
	for <qemu-devel@nongnu.org>; Wed, 27 May 2009 10:08:42 -0400
Received: from d01av01.pok.ibm.com (loopback [127.0.0.1])
	by d01av01.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id
	n4RE8geZ026681
	for <qemu-devel@nongnu.org>; Wed, 27 May 2009 10:08:42 -0400
Message-ID: <4A1D4965.2020309@us.ibm.com>
Date: Wed, 27 May 2009 09:08:37 -0500
From: Anthony Liguori <aliguori@us.ibm.com>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH 0/3] Object-based physical memory management
References: <1243157375-14329-1-git-send-email-avi@redhat.com>
In-Reply-To: <1243157375-14329-1-git-send-email-avi@redhat.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Avi Kivity <avi@redhat.com>
Cc: qemu-devel@nongnu.org

Avi Kivity wrote:
> Currently, qemu manages physical memory at a page granularity (and with
> subpage, at a byte granularity).  This is expensive in memory and runtime
> (requiring 8 bytes per page, and likely a cache miss on access), and is
> difficult to manage: devices must remember their ranges so they can free
> them, and the memory system has no insight into how memory is laid out.
>
> This patchset introduces object-based memory management.  The first patch
> adds objects and functions for memory regions; the second patch wraps this
> for PCI; and the third converts RTL8139 as an example.
>   

I like the basic notion here.  Instead of introducing the API and 
converting one user, I'd rather do a flag day and convert everything.

Once we agree on the API of course.

Regards,

Anthony Liguori