From owner-freebsd-mips@FreeBSD.ORG  Thu Aug  9 15:36:31 2012
Return-Path: <owner-freebsd-mips@FreeBSD.ORG>
Delivered-To: mips@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 5D8F71065672
	for <mips@freebsd.org>; Thu,  9 Aug 2012 15:36:31 +0000 (UTC)
	(envelope-from c.jayachandran@gmail.com)
Received: from mail-we0-f182.google.com (mail-we0-f182.google.com
	[74.125.82.182])
	by mx1.freebsd.org (Postfix) with ESMTP id E46B68FC16
	for <mips@freebsd.org>; Thu,  9 Aug 2012 15:36:30 +0000 (UTC)
Received: by weyx56 with SMTP id x56so471289wey.13
	for <mips@freebsd.org>; Thu, 09 Aug 2012 08:36:29 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:cc:content-type;
	bh=E2ZwIZUTh2xO/m0mxCMdV34QCB/QcTZQGcM/fve2X8s=;
	b=P584eVBp2wD/VQzyyXXGcNFsKCud4RHNLwSODkHuAaEp2xcb4v8x8NwKa9jKQ8q0v8
	/2G6K8fq9Y40sXUpLp2blxraifqNiurSv8jTZoaDRZJSZKVyACq72CvYcqrpHK9v+MYZ
	mgGYOwkCjpvpiUFEN2g0CEHxUnNoqtCarfPWOvpF4Tb5Xpw0uOfiqTXnMl1Yz4y1A+YO
	G2SZwkMvqCfK/x4T45fSC4R8Z3o/ePgPG1ZzsLpG8luJcPIQc+vscMcgYpnqZQPyAhgK
	odkDSnSxSRP3yHUWK9ngoF8Ymid6f1QIVKqvJC+FDxbOc7kL0xtm1/P9omUr4Zuk/94E
	/d1A==
MIME-Version: 1.0
Received: by 10.216.162.141 with SMTP id y13mr11647992wek.14.1344526589550;
	Thu, 09 Aug 2012 08:36:29 -0700 (PDT)
Received: by 10.216.153.42 with HTTP; Thu, 9 Aug 2012 08:36:29 -0700 (PDT)
In-Reply-To: <50228F5C.1000408@rice.edu>
References: <50228F5C.1000408@rice.edu>
Date: Thu, 9 Aug 2012 21:06:29 +0530
Message-ID: <CA+7sy7DxqhGhJt+wE3WW2-j4SxnPweULjYS5GQ=NgMYSrwJHtw@mail.gmail.com>
From: "Jayachandran C." <c.jayachandran@gmail.com>
To: Alan Cox <alc@rice.edu>
Content-Type: text/plain; charset=ISO-8859-1
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Cc: mips@freebsd.org
Subject: Re: mips pmap patch
X-BeenThere: freebsd-mips@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Porting FreeBSD to MIPS <freebsd-mips.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-mips>,
	<mailto:freebsd-mips-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-mips>
List-Post: <mailto:freebsd-mips@freebsd.org>
List-Help: <mailto:freebsd-mips-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-mips>,
	<mailto:freebsd-mips-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 09 Aug 2012 15:36:31 -0000

On Wed, Aug 8, 2012 at 9:40 PM, Alan Cox <alc@rice.edu> wrote:

> Can someone please test this patch?  It applies some changes to the mips
> pmap that were made a long time ago to the amd64 and i386 pmaps.  In
> particular, it reduces the size of a pv entry.
>
> Briefly, the big picture is that in order to move forward with further
> locking refinements to the VM system's machine-independent layer, I need to
> eliminate all uses of the page queues lock from every pmap.  In order to
> remove the page queues lock from the mips pmap, I need to port the new pv
> entry allocator from the amd64 and i386 pmaps.  This patch is preparation
> for that.


Tested the patch on XLP for about an hour ('make -j 64 buildworld' on 32
cpu mips64) and did not see any issues.

JC.