Date: Sun, 9 May 2010 06:02:01 GMT From: Erik Fonnesbeck <efonnes@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/146425: mwl dropping all packets during and after high usage on 802.11n Message-ID: <201005090602.o49621AA009766@www.freebsd.org> Resent-Message-ID: <201005090610.o496A2DV018869@freefall.freebsd.org>
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>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:
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