1.\" Copyright (c) 1997 2.\" Steve Passe <fsmp@FreeBSD.ORG>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. The name of the developer may NOT be used to endorse or promote products 10.\" derived from this software without specific prior written permission. 11.\" 12.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 13.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 16.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 19.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22.\" SUCH DAMAGE. 23.\" 24.\" $FreeBSD: src/share/man/man4/smp.4,v 1.7.2.4 2001/08/17 13:08:39 ru Exp $ 25.\" 26.Dd November 8, 2010 27.Dt SMP 4 28.Os 29.Sh NAME 30.Nm SMP 31.Nd description of the Symmetric MultiProcessor kernel 32.Sh SYNOPSIS 33.Cd options SMP 34.Sh DESCRIPTION 35The 36.Nm 37kernel implements symmetric multiprocessor support. 38APIC I/O can be enabled or disabled by setting the 39.Va hw.ioapic_enable 40loader tunable (default is enabled). 41.Sh COMPATIBILITY 42The 43.Nm 44kernel supports motherboards that follow the Intel MP specification, 45version 1.4. 46.Sh SEE ALSO 47.Xr mptable 1 , 48.Xr dmesg 8 49.Sh HISTORY 50The 51.Nm 52kernel's early history is not (properly) recorded. It was developed 53in a separate CVS branch until April 26, 1997, at which point it was 54merged into 3.0-current. By this date 3.0-current had already been 55merged with Lite2 kernel code. 56.Sh AUTHORS 57.An Steve Passe Aq fsmp@FreeBSD.org 58.Sh BUGS 59That would be a good guess... 60