From owner-freebsd-current@FreeBSD.ORG Sat Jan 30 18:34:25 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 27806106566B; Sat, 30 Jan 2010 18:34:25 +0000 (UTC) (envelope-from alan.l.cox@gmail.com) Received: from mail-px0-f183.google.com (mail-px0-f183.google.com [209.85.216.183]) by mx1.freebsd.org (Postfix) with ESMTP id E34E68FC13; Sat, 30 Jan 2010 18:34:24 +0000 (UTC) Received: by pxi13 with SMTP id 13so1260023pxi.3 for ; Sat, 30 Jan 2010 10:34:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:reply-to:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=Opk8+v1Ajo2h1aduqPkWN/GgyXjgky+DID09JSCpQtM=; b=hDcZtq2erJn1l41E71SF8W74NIcIXFEB63IeJ55T5gn+N+DSnzVKMzEFdVRjGVux9j vAgbjmICGdPRULDty63DdTnXqbkKJZyPsJW1UeK5EfD/aYTSYT4YDZ+DV1gMkIhcI/c/ IpT1Lnyfp7riIbQK09tx46qUHWc4TszMvCiMI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:reply-to:in-reply-to:references:date:message-id :subject:from:to:cc:content-type; b=Vecv4DRpIkFUTYgkwwSCqfQjGtnaCBBA9kW28GImBI/inmCqt4BfnIbt7Kih2Fjgj6 e9PJ8zakSboeC9M3qOcUsE/ENf3sVl9/XvkZGxpH4RasF0DpzMM0ms8RnyTi8AKrIIo+ N+nfDi5B0KiolJNEbdcuKGqVm/YbqHfgIi8aY= MIME-Version: 1.0 Received: by 10.143.153.19 with SMTP id f19mr1648545wfo.36.1264876464480; Sat, 30 Jan 2010 10:34:24 -0800 (PST) In-Reply-To: <4B32A1BF.1050200@protected-networks.net> References: <4B31AABD.2020804@ongs.co.jp> <4B322F56.3050703@protected-networks.net> <4B324994.2010805@icyb.net.ua> <4B328172.8070507@protected-networks.net> <4B329CF9.2020407@icyb.net.ua> <4B32A1BF.1050200@protected-networks.net> Date: Sat, 30 Jan 2010 12:34:24 -0600 Message-ID: From: Alan Cox To: Michael Butler Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-emulation@freebsd.org, freebsd-current , Andriy Gapon Subject: Re: JFYI: VirtualBox stable/unstable setteings (3.0.51.r22902) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: alc@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Jan 2010 18:34:25 -0000 On Wed, Dec 23, 2009 at 5:03 PM, Michael Butler wrote: > On 12/23/09 17:56, Alan Cox wrote: > >> Yes, there is an i386-specific race condition that I understand but >> haven't >> fixed. It's typically triggered by the page daemon calling uma_reclaim(). >> It affects all versions from 7.2 to HEAD. >> > > Ah - that's a shame because it does offer a noticeable "speed-up" on this > device with large executables, > > I just wanted to let you (and everyone else) know that this race condition with superpage promotion on i386 has been addressed in FreeBSD 7.x, 8.x, and HEAD. At this time, I don't know of any other bugs affecting superpage usage on i386. Regards, Alan