From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ey0-f171.google.com (mail-ey0-f171.google.com [209.85.215.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 352E3202224 for ; Sat, 23 Jun 2012 14:47:43 -0700 (PDT) Received: by eaaa12 with SMTP id a12so1549326eaa.16 for ; Sat, 23 Jun 2012 14:47:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=HdKqcLocf9vPmGuw+RI6M4y5XMEWJwLGU4lXZliUdQw=; b=oisApP9Hl8pOHdXGDj2b1CZY6JIH7j648e7COLHyduKvwvL85H5CXMwG3BIDna7ekE 0EfCEVo7FwQRT9CNLJbdUGpB/KSQYf9j0wjsCWWU1n97Qcw0f4sGzHxdMkF+grpXdypk yGmjzAf7Bu+OhZAebcrjXWYgQAnG5cHQmpKZs3rWnxRnc9DLhQeJcY2tVafiErhgAYXr pkiALtBelDLfjtPlD8J+RYHW24X3BK7pzaMt7RItjsPO+uruXihCAtE4Qd90hQfbnxWn OG+jIHEQRi+OnKkTlZ1/D8GDDhaTDEJ8xNl54TxTKPo2QfKkjicoLfyQRRULo9SKpEAk ou8w== Received: by 10.14.28.199 with SMTP id g47mr1296487eea.152.1340488061627; Sat, 23 Jun 2012 14:47:41 -0700 (PDT) Received: from ?IPv6:2001:5c0:1400:a::67d? ([2001:5c0:1400:a::67d]) by mx.google.com with ESMTPS id c42sm124409706eeb.2.2012.06.23.14.47.39 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 23 Jun 2012 14:47:40 -0700 (PDT) Message-ID: <4FE6397A.4080703@gmail.com> Date: Sat, 23 Jun 2012 22:47:38 +0100 From: Robert Bradley User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: cerowrt-devel@lists.bufferbloat.net References: <1340395875.353911244@apps.rackspace.com> <4FE4D882.50308@gmail.com> <1340479742.390625935@apps.rackspace.com> In-Reply-To: <1340479742.390625935@apps.rackspace.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Cerowrt-devel] Fwd: [PATCH] ag71xx: Added support for baby-jumbo packets. X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Jun 2012 21:47:44 -0000 On 23/06/12 20:29, dpreed@reed.com wrote: > I find it curious that packet aggregation is done in 802.11n standards, but that the packets are limited to 1540. I bet that limit may not be there in all Atheros NICs, and maybe not in this one. Will investigate now that I'm curious. > > The patch only affects the wired Ethernet driver, so 802.11n packet aggregation does not apply here. TSO and friends could apply in theory, but either is unsupported or disabled in this case. The wireless side is handled by the ath9k driver instead, where I know nothing about the upper limits on MTU. Depending on the cards used by the clients, the maximum MTU may be limited to 1500 even if the ath9k driver can cope. -- Robert Bradley