Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753374Ab0HZL5V (ORCPT ); Thu, 26 Aug 2010 07:57:21 -0400 Received: from mail-ew0-f46.google.com ([209.85.215.46]:39410 "EHLO mail-ew0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752502Ab0HZL5T (ORCPT ); Thu, 26 Aug 2010 07:57:19 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:cc:in-reply-to:references:content-type:date :message-id:mime-version:x-mailer:content-transfer-encoding; b=Dp2xLLePE9fyxFXSvki7hBfk8iDHZKzXTNc/WQhGe3F2Jw2p/l1uEx26RnNqbCOpou s55zvSmPdPEzSdoLpgZZEmpCQuuRllnoZso04iYi+1ryssDalbhbDzvKhI6v0ea8KpJK w/8HnCT69/lzS975sxI8sA+awv9ggiqTTJyNA= Subject: Re: RFC: MTU for serving NFS on Infiniband From: Eric Dumazet To: Marc Aurele La France Cc: Stephen Hemminger , Ben Hutchings , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, "David S. Miller" , Alexey Kuznetsov , "Pekka Savola (ipv6)" , James Morris , Hideaki YOSHIFUJI , Patrick McHardy In-Reply-To: References: <20100823080543.319143e3@nehalam> <1282672647.2302.15.camel@achroite.uk.solarflarecom.com> <1282688441.22839.34.camel@localhost> <20100824153920.63360072@s6510> Content-Type: text/plain; charset="UTF-8" Date: Thu, 26 Aug 2010 13:57:07 +0200 Message-ID: <1282823827.2476.663.camel@edumazet-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1067 Lines: 26 Le jeudi 26 août 2010 à 05:40 -0600, Marc Aurele La France a écrit : > Steady now. There's no need to YELL nor be arrogant. You and I both know > there's a place for NFS over UDP. That's not changing any time soon. While > I'm aware of the issue you brought up, it is separate from the one at hand in > this discussion. > > I do want to thank you, however, for reminding me of TCP. It's something > 20/20 hindsight says I should have checked out before starting this thread. > Logistically, it'll be a few days before I can do so though. If that allows > me to increase the MTU all the way up to 65520, then this UDP thing will > likely remain unresolved. > Unfortunately, your infiniband device lacks NETIF_F_SG support. MTU a bit larger than PAGE_SIZE-overhead will need high order allocations ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/