From owner-svn-src-head@FreeBSD.ORG  Sat Jun 15 10:35:19 2013
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id D3A4099E;
 Sat, 15 Jun 2013 10:35:19 +0000 (UTC)
 (envelope-from andrew@fubar.geek.nz)
Received: from nibbler.fubar.geek.nz (nibbler.fubar.geek.nz [199.48.134.198])
 by mx1.freebsd.org (Postfix) with ESMTP id B79A110FD;
 Sat, 15 Jun 2013 10:35:19 +0000 (UTC)
Received: from bender.Home (unknown [176.252.103.78])
 by nibbler.fubar.geek.nz (Postfix) with ESMTPSA id 359025E1D5;
 Sat, 15 Jun 2013 10:35:12 +0000 (UTC)
Date: Sat, 15 Jun 2013 11:35:03 +0100
From: Andrew Turner <andrew@fubar.geek.nz>
To: Jeff Roberson <jeff@FreeBSD.org>
Subject: Re: svn commit: r251709 - head/sys/vm
Message-ID: <20130615113503.4f5509dd@bender.Home>
In-Reply-To: <201306132105.r5DL5c4F013089@svn.freebsd.org>
References: <201306132105.r5DL5c4F013089@svn.freebsd.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
 src-committers@freebsd.org
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 15 Jun 2013 10:35:19 -0000

On Thu, 13 Jun 2013 21:05:38 +0000 (UTC)
Jeff Roberson <jeff@FreeBSD.org> wrote:

> Author: jeff
> Date: Thu Jun 13 21:05:38 2013
> New Revision: 251709
> URL: http://svnweb.freebsd.org/changeset/base/251709
> 
> Log:
>    - Convert the slab free item list from a linked array of indices
> to a bitmap using sys/bitset.  This is much simpler, has lower space
>      overhead and is cheaper in most cases.
>    - Use a second bitmap for invariants asserts and improve the
> quality of the asserts as well as the number of erroneous conditions
> that we will catch.
>    - Drastically simplify sizing code.  Special case refcnt zones
> since they will be going away.
>    - Update stale comments.

This broke booting for my on the Raspberry Pi for me. If I revert just
this change the board boots as expected. Kernel output from the boot
failure follows.

Andrew


KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2013 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights
reserved. FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 10.0-CURRENT #40 r251712:251749M: Fri Jun 14 17:33:49 BST 2013
    andrew@bender:/usr/obj/arm.armv6/usr/home/andrew/freebsd/repo/head/sys/RPI-B
arm FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
panic: lock "vm map (user)" 0xc05c1050 already initialized
KDB: enter: panic
[ thread pid 0 tid 0 ]
Stopped at      0xc0261894:     ldrb    r15, [r15, r15, ror r15]!
db>