From owner-freebsd-stable@FreeBSD.ORG Thu Feb 11 13:57:23 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6B03A1065672; Thu, 11 Feb 2010 13:57:23 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id 3AFD48FC0A; Thu, 11 Feb 2010 13:57:23 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id E183C46B51; Thu, 11 Feb 2010 08:57:22 -0500 (EST) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPA id 2A8728A021; Thu, 11 Feb 2010 08:57:22 -0500 (EST) From: John Baldwin To: freebsd-hackers@freebsd.org Date: Thu, 11 Feb 2010 08:13:25 -0500 User-Agent: KMail/1.12.1 (FreeBSD/7.2-CBSD-20100120; KDE/4.3.1; amd64; ; ) References: <4B72FC55.2090508@icyb.net.ua> <9bbcef731002101038r1ac04141t505216816489376f@mail.gmail.com> In-Reply-To: <9bbcef731002101038r1ac04141t505216816489376f@mail.gmail.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201002110813.26005.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Thu, 11 Feb 2010 08:57:22 -0500 (EST) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-1.4 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: freebsd-stable@freebsd.org, Ivan Voras , Andriy Gapon Subject: Re: Strange problem with 8-stable, VMWare vSphere 4 & AMD CPUs (unexpected shutdowns) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Feb 2010 13:57:23 -0000 On Wednesday 10 February 2010 1:38:37 pm Ivan Voras wrote: > On 10 February 2010 19:35, Andriy Gapon wrote: > > on 10/02/2010 20:26 Ivan Voras said the following: > >> On 10 February 2010 19:10, Andriy Gapon wrote: > >>> on 10/02/2010 20:03 Ivan Voras said the following: > >>>> When you say "very unique" is it in the "it is not Linux or Windows" > >>>> sense or do we do something nonstandard? > >>> The former - neither Linux, Windows or OpenSolaris seem to have what we have. > >> > >> I can't find the exact documents but I think both Windows > >> MegaUltimateServer (the highest priced version of Windows Server, > >> whatever it's called today) and Linux (though disabled and marked > >> Experimental) have it, or have some kind of support for large pages > >> that might not be as pervasive (maybe they use it for kernel only?). I > >> have no idea about (Open)Solaris. > > > > I haven't said that those OSes do not use large pages. > > I've said what I've said :-) > > Ok :) > > Is there a difference between "large pages" as they are commonly known > and "superpages" as in FreeBSD ? In other words - are you referencing > some specific mechanism, like automatic promotion / demotion of the > large pages or maybe something else? Yes, the automatic promotion / demotion. That is a far-less common feature. FreeBSD/i386 has used large pages for the kernel text as far back as at least 4.x, but that is not the same as superpages. Linux does not have automatic promotion / demotion to my knowledge. I do not know about other OS's. -- John Baldwin