From owner-freebsd-current@FreeBSD.ORG Thu Sep 29 16:31:55 2011 Return-Path: Delivered-To: freebsd-current@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B901410656F9; Thu, 29 Sep 2011 16:31:55 +0000 (UTC) (envelope-from david.somayajulu@qlogic.com) Received: from DB3EHSOBE001.bigfish.com (db3ehsobe001.messaging.microsoft.com [213.199.154.139]) by mx1.freebsd.org (Postfix) with ESMTP id 0D5AB8FC12; Thu, 29 Sep 2011 16:31:54 +0000 (UTC) Received: from mail32-db3-R.bigfish.com (10.3.81.241) by DB3EHSOBE001.bigfish.com (10.3.84.21) with Microsoft SMTP Server id 14.1.225.22; Thu, 29 Sep 2011 16:31:51 +0000 Received: from mail32-db3 (localhost.localdomain [127.0.0.1]) by mail32-db3-R.bigfish.com (Postfix) with ESMTP id 9AE411E8346; Thu, 29 Sep 2011 16:31:51 +0000 (UTC) X-SpamScore: 1 X-BigFish: VPS1(zzc85fhzz1202hzz8275bh8275dhz2ei2a8h668h839h) X-Forefront-Antispam-Report: CIP:198.70.193.64; KIP:(null); UIP:(null); IPVD:NLI; H:avexcashub1.qlogic.com; RD:avexcashub2.qlogic.com; EFVD:NLI Received-SPF: neutral (mail32-db3: 198.70.193.64 is neither permitted nor denied by domain of qlogic.com) client-ip=198.70.193.64; envelope-from=david.somayajulu@qlogic.com; helo=avexcashub1.qlogic.com ; 1.qlogic.com ; Received: from mail32-db3 (localhost.localdomain [127.0.0.1]) by mail32-db3 (MessageSwitch) id 1317313909267394_12171; Thu, 29 Sep 2011 16:31:49 +0000 (UTC) Received: from DB3EHSMHS014.bigfish.com (unknown [10.3.81.244]) by mail32-db3.bigfish.com (Postfix) with ESMTP id 329419F0053; Thu, 29 Sep 2011 16:31:49 +0000 (UTC) Received: from avexcashub1.qlogic.com (198.70.193.64) by DB3EHSMHS014.bigfish.com (10.3.87.114) with Microsoft SMTP Server (TLS) id 14.1.225.22; Thu, 29 Sep 2011 16:31:46 +0000 Received: from avexmb1.qlogic.org ([fe80::9545:3a4f:c131:467d]) by avexcashub2.qlogic.org ([::1]) with mapi; Thu, 29 Sep 2011 09:31:43 -0700 From: David Somayajulu To: "freebsd-current@freebsd.org" , "freebsd-drivers@freebsd.org" Date: Thu, 29 Sep 2011 09:31:44 -0700 Thread-Topic: TSO and FreeBSD Thread-Index: Acx+xUZPFcRhlwbHSXe81IV5JeNfjQ== Message-ID: <75E1A2A7D185F841A975979B0906BBA67BCCB4F67F@AVEXMB1.qlogic.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US MIME-Version: 1.0 X-OriginatorOrg: qlogic.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: TSO and FreeBSD X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Sep 2011 16:31:55 -0000 Is there an upper limit on a transmit packet size, which has CSUM_TSO bit s= et in the mp->m_pkthdr.csum_flags field. Browsing the code I thought it was= 65535 bytes. However at least on Freebsd 7.x, I am occasionally noticing t= hat the driver is asked to transmit packets which are 65536 and 65537 bytes= . Am I missing something? Cheers, David S. ________________________________ This message and any attached documents contain information from QLogic Cor= poration or its wholly-owned subsidiaries that may be confidential. If you = are not the intended recipient, you may not read, copy, distribute, or use = this information. If you have received this transmission in error, please n= otify the sender immediately by reply e-mail and then delete this message.