From owner-freebsd-hackers@FreeBSD.ORG Sat Aug 30 17:06:55 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 32FCB106566B for ; Sat, 30 Aug 2008 17:06:55 +0000 (UTC) (envelope-from stef-list@memberwebs.com) Received: from mx.npubs.com (mail.wsfamily.com [209.66.100.224]) by mx1.freebsd.org (Postfix) with ESMTP id 1E3258FC1D for ; Sat, 30 Aug 2008 17:06:54 +0000 (UTC) (envelope-from stef-list@memberwebs.com) Received: from mx.npubs.com (avhost [209.66.100.194]) by mx.npubs.com (Postfix) with ESMTP id 7F56929C1BB8; Sat, 30 Aug 2008 16:43:05 +0000 (UTC) Received: from northstar-srv2 (unknown [172.27.2.11]) by mx.npubs.com (Postfix) with ESMTP id 0658229C1BBA; Sat, 30 Aug 2008 16:43:04 +0000 (UTC) From: Stef User-Agent: Thunderbird 2.0.0.16 (X11/20080724) MIME-Version: 1.0 To: Barry Boes References: <18612.51201.285688.628405@gargle.gargle.HOWL> <48B52AEE.9080205@FreeBSD.org> <18613.21419.16360.120533@gargle.gargle.HOWL> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: <20080830164305.0658229C1BBA@mx.npubs.com> X-Virus-Scanned: ClamAV using ClamSMTP Date: Sat, 30 Aug 2008 16:43:05 +0000 (UTC) Cc: freebsd-hackers@freebsd.org Subject: Re: kvm on amd64 - >6G? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: stef@memberwebs.com List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Aug 2008 17:06:55 -0000 Barry Boes wrote: > I could apply such a patch to my servers, but there are two disadvantages : > o who wants to apply kernel patches to mission critical servers? Isn't > that a linux thing (joke!) Unfortunately it's not. There's a whole raft of patches (with PR's filed) that are required when you're using certain configurations of FreeBSD. In particular my 6.3 production servers require: * A bunch of patches to ataraid to prevent panics, make the raid work during failures etc... Many can be found here: http://wiki.freebsd.org/JeremyChadwick/ATA_issues_and_troubleshooting * Patch to the 4BSD scheduler to prevent regular deadlocks on all quad core systems I have access to: http://www.mail-archive.com/freebsd-hackers@freebsd.org/msg64390.html * Patch for fixing devfs to have proper behavior with symlinks in jails: http://www.freebsd.org/cgi/query-pr.cgi?pr=114057 And there are one or two other patches on some deployed systems (eg: 'multi ip jail patches'). I used to be in the no-patches-on-my-production-servers camp, but I've found that it was unrealistic and resulted in less stable systems. Cheers, Stef Walter