Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754382Ab2FTHK7 (ORCPT ); Wed, 20 Jun 2012 03:10:59 -0400 Received: from wolverine01.qualcomm.com ([199.106.114.254]:63833 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752367Ab2FTHK5 (ORCPT ); Wed, 20 Jun 2012 03:10:57 -0400 X-IronPort-AV: E=McAfee;i="5400,1158,6747"; a="202783788" X-IronPort-AV: E=Sophos;i="4.77,440,1336374000"; d="scan'208";a="121435188" Date: Wed, 20 Jun 2012 12:42:10 +0530 From: Rajkumar Manoharan To: Michael Leun CC: Mohammed Shafi , , Subject: Re: ath9k_htc: Every 2nd packet 1000ms delayed in recent kernels Message-ID: <20120620071208.GA9619@vmraj-lnx.qca.qualcomm.com> References: <20120619085137.337838c0@xenia.leun.net> <20120620003315.2eaf6460@xenia.leun.net> <20120620061303.GA8738@vmraj-lnx.qca.qualcomm.com> <20120620085515.421571e1@xenia.leun.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20120620085515.421571e1@xenia.leun.net> User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [172.30.48.1] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3310 Lines: 80 On Wed, Jun 20, 2012 at 08:55:15AM +0200, Michael Leun wrote: > On Wed, 20 Jun 2012 11:43:05 +0530 > Rajkumar Manoharan wrote: > > > On Wed, Jun 20, 2012 at 12:33:15AM +0200, Michael Leun wrote: > > > On Tue, 19 Jun 2012 15:11:38 +0530 > > > Mohammed Shafi wrote: > > > > > > > Hi, > > > > > > > > On Tue, Jun 19, 2012 at 12:21 PM, Michael Leun > > > > wrote: > > > > > Hi, > > > > > > > > > > ne-wlan1@elektra:/home/ml4> ping 192.168.2.1 > > > > > PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data. > > > > > 64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=2010 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=1011 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=11.5 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=1.12 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=5 ttl=64 time=1002 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=6 ttl=64 time=3.83 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=7 ttl=64 time=1003 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=8 ttl=64 time=4.10 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=9 ttl=64 time=1003 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=10 ttl=64 time=3.95 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=11 ttl=64 time=1003 ms > > > > > 64 bytes from 192.168.2.1: icmp_seq=12 ttl=64 time=3.78 ms > > > > > > > > > > > > > > > Please note the additional delay of ~1000ms every 2nd packet. > > > > > This is Kernel 3.4.3, have seen it in 3.4.2 also. Does NOT > > > > > happen in 3.3.1. > > > > > > > > > > Is this Issue already known? If so, I can save the work > > > > > bisecting... > > > > > > > > looks like some one reported this bug in kernel bugzilla. would be > > > > saving us lot of time > > > > if you can bisect it! > > > > > > > > > > 0775f9f90cdaf40fbf69b3192b3dddb2b3436f45 is the first bad commit > > > commit 0775f9f90cdaf40fbf69b3192b3dddb2b3436f45 > > > Author: Johannes Berg > > > Date: Thu Mar 8 15:02:06 2012 +0100 > > > > > > mac80211: remove spurious BSSID change flag > > > > > > The BSSID has been set a lot earlier already and > > > didn't change again in ieee80211_set_associated(). > > > > > > Signed-off-by: Johannes Berg > > > Signed-off-by: John W. Linville > > > > > > :040000 040000 67a19a39e4b04c16921a3758ddd2362e02e81dd3 > > > 4a7cbd327b59345b83fa613f893770fbf44220bb M net > > > > > > Reverting 0775f9f90cdaf40fbf69b3192b3dddb2b3436f45 from 3.4.3 fixes > > > the issue. > > > > > Michael, > > > > Thanks for the analysis. Can you please try with the attached patch > > without reverting mac80211 change? > > [forgotten attachment was added in later mail] > > Yes, that also solves the issue. I guess, you will look into getting > that into mainline and stable asap? > Thanks Michael. I already posted the patch to l-w. http://comments.gmane.org/gmane.linux.kernel.wireless.general/93099 -Rajkumar -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/