From owner-freebsd-bugs@FreeBSD.ORG Sun May 9 06:10:03 2010 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 58E531065673 for ; Sun, 9 May 2010 06:10:03 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [69.147.83.40]) by mx1.freebsd.org (Postfix) with ESMTP id 1D61D8FC0A for ; Sun, 9 May 2010 06:10:03 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o496A2wg018870 for ; Sun, 9 May 2010 06:10:02 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o496A2DV018869; Sun, 9 May 2010 06:10:02 GMT (envelope-from gnats) Resent-Date: Sun, 9 May 2010 06:10:02 GMT Resent-Message-Id: <201005090610.o496A2DV018869@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Erik Fonnesbeck Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 2D68F106564A for ; Sun, 9 May 2010 06:02:02 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [69.147.83.33]) by mx1.freebsd.org (Postfix) with ESMTP id 1CD8B8FC0C for ; Sun, 9 May 2010 06:02:02 +0000 (UTC) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.3/8.14.3) with ESMTP id o4962181009767 for ; Sun, 9 May 2010 06:02:01 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id o49621AA009766; Sun, 9 May 2010 06:02:01 GMT (envelope-from nobody) Message-Id: <201005090602.o49621AA009766@www.freebsd.org> Date: Sun, 9 May 2010 06:02:01 GMT From: Erik Fonnesbeck To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: misc/146425: mwl dropping all packets during and after high usage on 802.11n X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 May 2010 06:10:03 -0000 >Number: 146425 >Category: misc >Synopsis: mwl dropping all packets during and after high usage on 802.11n >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun May 09 06:10:02 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Erik Fonnesbeck >Release: 8.0 >Organization: >Environment: FreeBSD bsd.local 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21 15:48:17 UTC 2009 root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >Description: When using the card in 802.11n in access point mode, testing with file copying to or from a Windows system with an 802.11n card (specifically an Atheros 5416-based card in this card) with the other endpoint being accessed over 100 Mbps ethernet, after a short time it started to drop all packets, even after the transfer was stopped. Before the packet loss, the transfer is typically far below 802.11g's fastest rate. >How-To-Repeat: Use mwl as 802.11n access point and copy a file over the network without a speed cap set. >Fix: If ampdu is disabled, the packet loss does not occur. After that it can also at least reach, but not exceed, 802.11g rates. >Release-Note: >Audit-Trail: >Unformatted: