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