From owner-freebsd-stable@FreeBSD.ORG Sun Apr 12 09:25:05 2009 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 DB57F1065702 for ; Sun, 12 Apr 2009 09:25:05 +0000 (UTC) (envelope-from petefrench@ticketswitch.com) Received: from constantine.ticketswitch.com (constantine.ticketswitch.com [IPv6:2002:57e0:1d4e:1::3]) by mx1.freebsd.org (Postfix) with ESMTP id 9F41D8FC0C for ; Sun, 12 Apr 2009 09:25:05 +0000 (UTC) (envelope-from petefrench@ticketswitch.com) Received: from dilbert.rattatosk ([10.64.50.6] helo=dilbert.ticketswitch.com) by constantine.ticketswitch.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69 (FreeBSD)) (envelope-from ) id 1Lsvvy-0002Pt-Nj; Sun, 12 Apr 2009 10:25:02 +0100 Received: from petefrench by dilbert.ticketswitch.com with local (Exim 4.69 (FreeBSD)) (envelope-from ) id 1Lsvvy-000NNW-M7; Sun, 12 Apr 2009 10:25:02 +0100 To: kensmith@cse.Buffalo.EDU, mike@sentex.net, raul@b2n.org In-Reply-To: <200904120334.n3C3YYoi012896@lava.sentex.ca> Message-Id: From: Pete French Date: Sun, 12 Apr 2009 10:25:02 +0100 Cc: freebsd-stable@freebsd.org Subject: Re: problems with 7.2, vm_page_insert: page already inserted 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: Sun, 12 Apr 2009 09:25:06 -0000 >You're the second one to report this panic so it's caught our notice as >something to watch over. One report of a panic like this is potentially >issues with memory errors or any number of other possibilities given >this area of code but more than that deserves us paying more attention >to it. Well, here's a third report for you - I saw the same panic, and I was also running without swap at the time. I was migrating a system from UFS to using ZFS, which I did by NFS mounting some space, copying the files there, then repartitioning the original machine and copying them back. I got the panic during one of the big copy sessions, but I can't rememer the direction I'm afraid. The system is running STABLE from early March. I didn't report it at the time as I just assumed it was a ZFS tuning issue, but now I see this thread and I realise I've never seen that panic on any ZFS machines. It was a one-off, but that does make three of us now. Is the common factor that we all had swap disabled at the time ? That worries me as I now install all our webservers with twice the RAM and no swap, due to the fact that having swap gves us worse behaviour when we get overloaded. -pete.