Date: Thu, 23 Jan 2003 13:34:08 -0800 From: Peter Wemm <peter@wemm.org> To: John Baldwin <jhb@FreeBSD.org> Cc: Paul Richards <paul@freebsd-services.com>, cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/i386 identcpu.c initcpu.c locore.s Message-ID: <20030123213408.2B94A2A8A5@canning.wemm.org> In-Reply-To: <XFMail.20030123103957.jhb@FreeBSD.org>
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John Baldwin wrote: > > On 23-Jan-2003 Paul Richards wrote: > > On Wed, Jan 22, 2003 at 12:14:53PM -0800, John Baldwin wrote: > >> jhb 2003/01/22 12:14:53 PST > >> > >> Modified files: (Branch: RELENG_4) > >> sys/i386/i386 identcpu.c initcpu.c locore.s machdep.c > >> mp_machdep.c > >> sys/i386/include asnames.h md_var.h > >> Log: > >> MFC: Precursors to simple hyperthreading support and sync with current: > > > > Is it a good idea to do this in 4? > > The simple HT support is a very small patch (see > http://www.FreeBSD.org/~jhb/patches/htt.patch) and is something that several > people/companies that use 4.x need. > > > We should stop moving new features into 4 for 2 reasons, a) I've always > > been against feature development of -stable, but b) we need to encourage > > take-up of our latest branch and the less "modern" 4 is the more likely > > people will be to migrate around 5.2. The SMP work won't be such a huge > > draw since so few people have SMP machines. > > Most if not all of the new P4's coming out do have HT support nowadays. > Also, I don't know about you, but where I work we aren't going to be > using 5.x in production until it gets a lot better. Both SMPng and > KSE (and other things like new schedulers) are very ambitious projects > that take a while to get done. There is no magic waving of arms that > is going to solve those problems in the next 3 months. Yes, and all the SMP P4 Xeons have it and have had it for a while. HT isn't exactly new, it has been in production systems for months. Cheers, -Peter -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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