Date: Thu, 02 Jan 2003 12:42:38 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Nate Lawson <nate@root.org> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, "David O'Brien" <obrien@FreeBSD.org> Subject: Re: cvs commit: src/sys/kern subr_smp.c Message-ID: <XFMail.20030102124238.jhb@FreeBSD.org> In-Reply-To: <Pine.BSF.4.21.0212291541200.85347-100000@root.org>
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On 29-Dec-2002 Nate Lawson wrote: > On Sun, 29 Dec 2002, David O'Brien wrote: >> On Sat, Dec 28, 2002 at 03:53:00PM -0800, Nate Lawson wrote: >> > On Sat, 28 Dec 2002, Jake Burkholder wrote: >> > > Modified files: >> > > sys/kern subr_smp.c >> > > Log: >> > > Add a tunable kern.smp.disabled for disabling explicitly smp on an smp >> > > kernel. >> > > >> > > Revision Changes Path >> > > 1.171 +5 -1 src/sys/kern/subr_smp.c >> > >> > Would love to see this go into RELENG_4 (and 5.0 for that matter). This >> > would aid testing. >> >> That would only help Alpha wouldn't it? We don't have the ability to >> turn on and off SMP on i386. > > It's never been possible to turn on smp after boot on FreeBSD. This only > disables it at boot time and should work on every platform. > > I'm not sure what facility this would use on 4.x since it doesn't have > loader tunables. In any case, I'd like to see this in 5.0. It wouldn't work in 4.x because of the broken way (compile-time choice) we decide to use APICs or not. Alpha doesn't have SMP in 4.x, so that is irrelevant. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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