Return-path: Received: from mail.neratec.com ([80.75.119.105]:50336 "EHLO mail.neratec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756434Ab3BLKwH (ORCPT ); Tue, 12 Feb 2013 05:52:07 -0500 Message-ID: <511A1D88.6080406@neratec.com> (sfid-20130212_115212_239845_C7A10C72) Date: Tue, 12 Feb 2013 11:46:32 +0100 From: Wojciech Dubowik MIME-Version: 1.0 To: Kalle Valo CC: Johannes Berg , linux-wireless@vger.kernel.org Subject: Re: [BUG] Beacon loss event every second References: <5118F682.8000502@neratec.com> <1360592857.8738.30.camel@jlt4.sipsolutions.net> <51190341.40806@neratec.com> <87bobpc0ft.fsf@purkki.adurom.net> <511A15D4.6070808@neratec.com> <877gmdbzkc.fsf@purkki.adurom.net> <511A1867.6060708@neratec.com> In-Reply-To: <511A1867.6060708@neratec.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 02/12/2013 11:24 AM, Wojciech Dubowik wrote: > On 02/12/2013 11:23 AM, Kalle Valo wrote: >> Wojciech Dubowik writes: >> >>> I have a test pc with 3x AR9590 and 2x AR9390. Machine is based on i7 >>> and hyperthreading is on so I have 8 cores. >>> I am using latest wireless testing ath9k and 3.8rc7 kernel. >>> >>> What I see is that for some extended periods odf time beacons are not >>> processed in ieee80211_rx_mgmt_beacon >>> and that's why I get beacon loss. I am using 30ms beacon period. >>> >>> >>> What is really funny, that I get this beacon loss message every >>> second. Like is sth was locking ifmgd->mtx mutex >>> at constant intervals. >>> >>> >>> I will try to disable all cores and run in again to see if it's rcu >>> problem. >> You could also try wireless-next or wireless-testing to pinpoint if the >> problem is in wireless code or not. >> > I see it on wireless-testing and mac80211-next. I will try with other > driver later today. > > I can see also other problem like authentication frame always timing > out the first time > but I will handle it later. It has turned out that I had bad irq, switch to polling problem. Without interrupts for wireless cards I will for sure see such problems. Sorry for spamming. Wojtek > -- > To unsubscribe from this list: send the line "unsubscribe > linux-wireless" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html