From owner-freebsd-xen@freebsd.org Tue Jul 14 18:55:48 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 D42449A118D for ; Tue, 14 Jul 2015 18:55:48 +0000 (UTC) (envelope-from bounces+73574-0602-freebsd-xen=freebsd.org@sendgrid.net) Received: from o1.l99.sendgrid.net (o1.l99.sendgrid.net [198.37.153.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 82DAAF6C for ; Tue, 14 Jul 2015 18:55:47 +0000 (UTC) (envelope-from bounces+73574-0602-freebsd-xen=freebsd.org@sendgrid.net) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sendgrid.info; h=from:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; s=smtpapi; bh=PtJBYCjKkZKfuin9TiEmnBf0PRQ=; b=W2EvBfgmXowQm/Ty5W a8AFJx406+HgUXwOygcIMcF1gTPndItL8q00L3oMWYwP6W+IbdAbWG6vK8Ckk1og dH0e8uXDR31A1x8SSlece8r5UJuDjS8IZPc8TrR8aTmKGCiaX+OPLa5P9yOJCLWR ha/MqwwXc01V8cmyjpJ17FGvw= Received: by filter0569p1mdw1.sendgrid.net with SMTP id filter0569p1mdw1.15118.55A55B309 2015-07-14 18:55:44.343286425 +0000 UTC Received: from mail.tarsnap.com (ec2-54-86-246-204.compute-1.amazonaws.com [54.86.246.204]) by ismtpd-034 (SG) with ESMTP id 14e8dec3495.2f6c.516cea for ; Tue, 14 Jul 2015 18:55:44 +0000 (UTC) Received: (qmail 16093 invoked from network); 14 Jul 2015 18:51:56 -0000 Received: from unknown (HELO clamshell.daemonology.net) (127.0.0.1) by ec2-107-20-205-189.compute-1.amazonaws.com with ESMTP; 14 Jul 2015 18:51:56 -0000 Received: (qmail 97398 invoked from network); 14 Jul 2015 18:54:32 -0000 Received: from unknown (HELO clamshell.daemonology.net) (127.0.0.1) by clamshell.daemonology.net with SMTP; 14 Jul 2015 18:54:32 -0000 Message-ID: <55A55AE8.4090101@freebsd.org> Date: Tue, 14 Jul 2015 11:54:32 -0700 From: Colin Percival User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: Mark Felder , freebsd-xen@freebsd.org CC: gnn@freebsd.org Subject: Re: Networking under Xen References: <4E7B7075-4E0D-4EA7-9F5D-6D252CFBD487@gmail.com> <1436890526.3162974.323521249.6B73E6E2@webmail.messagingengine.com> In-Reply-To: <1436890526.3162974.323521249.6B73E6E2@webmail.messagingengine.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-SG-EID: RUbAm5H8PjswBj/QH+sYVehaJogg3iBnZcyVi1bw/IzLq/G9GHWzk+yW/aLPpKZgXeKlAR96v/S+r6 CwJeffdvfgslHtBPEAEoo+O0Tk7F6AQWyEg8TZvyufp3Mhye0y/N6kkyIFHJ43ij+v80fho5mwpAx2 u4/shTEmswhfwSmYXcQy5KuKYWauFpethMYT 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: Tue, 14 Jul 2015 18:55:48 -0000 On 07/14/15 09:15, Mark Felder wrote: > On Tue, Jul 14, 2015, at 07:36, Sydney Meyer wrote: >> - Dropped/Stalled Connections with TCP Segmentation Offload and pf >> enabled. > > TSO is a known issue. I've been turning it off for years to get FreeBSD > to play nice on Xen. More precisely *pf* is a known issue. It's inserting TCP checksums into TSO packets. I reported this a long time ago and I don't know why pf still hasn't been fixed. -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid