From owner-freebsd-net@freebsd.org Mon Nov 23 15:30:34 2015 Return-Path: Delivered-To: freebsd-net@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 DDA72A33D54 for ; Mon, 23 Nov 2015 15:30:34 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-ig0-x232.google.com (mail-ig0-x232.google.com [IPv6:2607:f8b0:4001:c05::232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A12681BCD for ; Mon, 23 Nov 2015 15:30:34 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by igcto18 with SMTP id to18so58509182igc.0 for ; Mon, 23 Nov 2015 07:30:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=1QtS485PSWFGE9oTiDQx3xYmFXehBrv5V+OsVQV1TKg=; b=cS0/BTr3wsg0N8o9JXOQjP4PxZiIeVp00wJ03Z7YtDuz638Rgjf7fVsAiALc8M/RuQ eujudjZvZCB5t6WspAayWFk3L3MiF+RIaAeroDLTKYZEVfRbOBHSzqr6NtzRnau3p9pp dtzbHb0pHTiZk2RGxjLqdYPgX3M1C+SSS/5jBpBsM8D/Cr3Emm48xznRfhBg+7jRwF39 YAIY4Ud24CMj8ZRxQ+4ok1/24j3zQtnVhVpxdsVGj18sVwoSZCQ0rcA54nS73wk8GpaD A8bYPIO097+RQLgBXCz4nECLcRm+s8ZkcJIh8R3jbBWjNlH2ZAYFbsRr572pOcpI17W9 q8NQ== MIME-Version: 1.0 X-Received: by 10.50.65.74 with SMTP id v10mr13293413igs.61.1448292633707; Mon, 23 Nov 2015 07:30:33 -0800 (PST) Received: by 10.36.217.196 with HTTP; Mon, 23 Nov 2015 07:30:33 -0800 (PST) In-Reply-To: References: Date: Mon, 23 Nov 2015 07:30:33 -0800 Message-ID: Subject: Re: Is it allowed to copy hyper-v drivers from FreeBSD 10 and packed it into FreeBSD 9.2 From: Adrian Chadd To: Hongjiang Zhang Cc: "freebsd-net@freebsd.org" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Nov 2015 15:30:35 -0000 On 22 November 2015 at 21:58, Hongjiang Zhang wrote= : > Hi, > > Some people, who used FreeBSD 9.2 and back-port network driver for Hyper-= v from FreeBSD 10, encountered a network issue. They installed 2 VM (FreeBS= D 9.2 with the customized FreeBSD kernel) on Azure. Network went offline ve= ry soon when the big file (~320M byte) is copied from one VM to anther thro= ugh "scp". If TSO is disabled through "sysctl -w net.inet.tcp.tso=3D0", thi= s issue will be alleviated but cannot be eliminated. I did not figure out w= hy. > > I have checked the release notes of FreeBSD 9.2/9.3/10, but did not find = anything which blocked the back-port. It is supposed 9.2 allows the back-po= rted Hyper-v drivers from 10. Is this assumption correct? Hi! It may be something to do with maximum mbufs per packet or some other limit like that. Is there a lot of interest in backporting the latest hyperv driver to 9.2? -a > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"