From owner-freebsd-stable@FreeBSD.ORG Wed Feb 10 17:13:36 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 7A02A106566B; Wed, 10 Feb 2010 17:13:36 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id 54FF08FC13; Wed, 10 Feb 2010 17:13:34 +0000 (UTC) Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua [212.40.38.101]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id TAA06644; Wed, 10 Feb 2010 19:13:33 +0200 (EET) (envelope-from avg@icyb.net.ua) Message-ID: <4B72E93C.80102@icyb.net.ua> Date: Wed, 10 Feb 2010 19:13:32 +0200 From: Andriy Gapon User-Agent: Thunderbird 2.0.0.23 (X11/20091206) MIME-Version: 1.0 To: Ivan Voras References: <4B72D94A.8030509@icyb.net.ua> In-Reply-To: X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: freebsd-hackers@freebsd.org, freebsd-stable@freebsd.org 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: Wed, 10 Feb 2010 17:13:36 -0000 on 10/02/2010 19:05 Ivan Voras said the following: > On 02/10/10 17:05, Andriy Gapon wrote: >> on 10/02/2010 17:36 Ivan Voras said the following: >>> It looks like I've stumbled upon a bug in vSphere 4 (recent update) with >>> FreeBSD/amd64 8.0/8-stable (but not 7.x) guests on Opteron(s). In this >>> combination, everything works fine until a moderate load is started - a >>> buildworld is enough. About five minutes after the load starts, the >>> vSphere client starts getting timeouts while talking with the host and >>> soon after the guest VM is forcibly shut down without any trace of a >>> reason in various logs. The same VM runs fine on hosts with Xeon CPUs. >>> The shutdown happens regardless if there is a vSphere client connected. >>> >>> This is very repeatable, on Sun Fire X4140 hosts. >>> >>> With 7.x/7.stable guests everything works fine. >>> >>> I'm posting this for future reference and to see if anyone has >>> encountered something like that, or has an idea why this happens. >> >> Wild guess - try disabling superpages in the guests. > > It looks like your guess is perfectly correct :) The guest has been > doing buildworlds for an hour and it works fine. Thanks! > > It's strange how this doesn't affect the Xeons... I really can not tell more but there seems to be an issue between our implementation of superpages (very unique) and AMD processors from 10h family. I'd recommend not using superpages feature with those processors for time being. -- Andriy Gapon