From owner-freebsd-xen@freebsd.org Mon Sep 7 13:18:20 2015 Return-Path: Delivered-To: freebsd-xen@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EADD39CC1FD for ; Mon, 7 Sep 2015 13:18:20 +0000 (UTC) (envelope-from kpielorz_lst@tdx.co.uk) Received: from smtp.krpservers.com (smtp.krpservers.com [62.13.128.145]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.krpservers.com", Issuer "RapidSSL SHA256 CA - G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 953841E7B for ; Mon, 7 Sep 2015 13:18:19 +0000 (UTC) (envelope-from kpielorz_lst@tdx.co.uk) Received: from [10.12.30.106] (vpn01-01.tdx.co.uk [62.13.130.213] (may be forged)) (authenticated bits=0) by smtp.krpservers.com (8.14.9/8.14.9) with ESMTP id t87Cw99t093054 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 7 Sep 2015 13:58:11 +0100 (BST) (envelope-from kpielorz_lst@tdx.co.uk) Date: Mon, 07 Sep 2015 13:58:28 +0100 From: Karl Pielorz To: freebsd-xen@freebsd.org Subject: XenServer 6.5(SP1) - HVM 're0: watchdog timeout' errors... Message-ID: <9CC4073DE17E3C8BD01EF7D3@[10.12.30.106]> X-Mailer: Mulberry/4.0.8 (Win32) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Sep 2015 13:18:21 -0000 Hi, We have a bunch of FreeBSD 10.1 hosts we run the NIC's as HVM (this avoids a known networking issue with XenServer and PV networks under FreeBSD to do with routing packets for other Xen DomU). This seems to work OK - but recently we've had a whole bunch of: Sep 7 12:41:08 host1 kernel: re0: watchdog timeout ... Sep 7 12:42:03 host1 kernel: re1: watchdog timeout This seems to 'break' networking for the guest. I've tried doing 'ifconfig re0 down / ifconfig re0 up' - this doesn't appear to fix things - but rebooting the DomU guest does (when it comes back, networking is restored). Searching around with Google turns up some similar issues with NetBSD along with the comment that the QEMU Realtek card doesn't have watchdog emulation - so it should be disabled in the driver. How applicable to FreeBSD that is, I don't know. This seems to happen when the VM's are migrated (e.g. Xen Storage Motion) from one SR to another - or migrated, full stop (i.e. from one XenServer to another - but using shared storage). Anyone know if that same "there is no re watchdog" issue is a possible cause? - Or any suggestions for fixes? -Karl