From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758194AbZDEJxx (ORCPT ); Sun, 5 Apr 2009 05:53:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756460AbZDEJxk (ORCPT ); Sun, 5 Apr 2009 05:53:40 -0400 Received: from hera.kernel.org ([140.211.167.34]:34480 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758073AbZDEJxh (ORCPT ); Sun, 5 Apr 2009 05:53:37 -0400 Subject: Re: ath9k becon loss messages From: Jaswinder Singh Rajput To: Michael Buesch Cc: Sujith , wireless , David Miller , LKML In-Reply-To: <200904051129.38904.mb@bu3sch.de> References: <1238923439.4120.9.camel@localhost.localdomain> <200904051129.38904.mb@bu3sch.de> Content-Type: text/plain Date: Sun, 05 Apr 2009 15:22:54 +0530 Message-Id: <1238925174.4120.12.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.24.4 (2.24.4-1.fc10) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2009-04-05 at 11:29 +0200, Michael Buesch wrote: > > [ 1678.823011] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1798.830589] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1918.828044] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2038.827224] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2116.517152] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2158.840243] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2278.827427] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > > I think this message should only show if CONFIG_MAC80211_VERBOSE_DEBUG is set. > It's kind of expected that we lose a beacon once in a while, so we shouldn't print > verbose messages to the kernel log (even if they are KERN_DEBUG). > > And besides that, I think one can easily remotely trigger this message and flood the logs. > So it should probably _also_ be ratelimited. > normally it prints after 120 seconds: [ 1078.848434] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 1198.822913] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 1318.824931] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 1438.814157] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 1558.827336] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 1678.823011] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 1798.830589] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 1918.828044] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2038.827224] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2116.517152] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2158.840243] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2278.827427] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2398.827010] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2518.817295] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2638.821208] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2758.838757] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2878.825043] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 2998.828296] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3118.821456] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3238.813293] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3358.816763] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3478.820291] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3598.815145] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3718.814290] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3838.829043] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request [ 3958.817294] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request -- JSR