From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753529AbYITVTB (ORCPT ); Sat, 20 Sep 2008 17:19:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751678AbYITVSw (ORCPT ); Sat, 20 Sep 2008 17:18:52 -0400 Received: from ik-out-1112.google.com ([66.249.90.176]:42650 "EHLO ik-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751652AbYITVSv (ORCPT ); Sat, 20 Sep 2008 17:18:51 -0400 Message-ID: Date: Sat, 20 Sep 2008 14:18:48 -0700 From: "Steven Noonan" To: "Luis R. Rodriguez" Subject: Re: [ath9k-devel] ath9k: massive unexplained latency in 2.6.27 (rc5, rc6, probably others) Cc: linux-wireless , LKML , "Senthilkumar Balasubramanian" , "ath9k-devel@lists.ath9k.org" , "Luis Rodriguez" , "Ingo Molnar" In-Reply-To: <43e72e890809201357y1413a151r85aad7cc16440cf4@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080919175824.GA5626@senthil-lnx.users.atheros.com> <20080919182322.GB7027@tesla> <20080919235305.GD11665@tesla> <43e72e890809191813n95579f5h83e92b0ba1f95a44@mail.gmail.com> <43e72e890809201357y1413a151r85aad7cc16440cf4@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Sep 20, 2008 at 1:57 PM, Luis R. Rodriguez wrote: > So here's what we need to do -- try to zero on in what causes this IRQ > storm. How is the best way to approach this? I assume ATH_DBG_INTERRUPT and pray like hell my /var partition doesn't fill up first? Maybe I'll just symlink /var/log/messages to a file on a substantially larger pattition... > Most likely its some strange event that triggers it, perhaps > some sort of noise which makes the device try to adapt and hits a path > we are not handling correctly yet. Can you provide the initial log of > when ath9k gets loaded? This tells us what card it is, like AR5416 or > AR9280, etc. [10238.347956] ath9k: 0.1 [10238.348028] vendor=8086 device=27d2 [10238.348033] ath9k 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [10238.348050] ath9k 0000:03:00.0: setting latency timer to 64 [10238.480781] phy1: Selected rate control algorithm 'ath9k_rate_control' [10238.483320] phy1: Atheros 5416: mem=0xffffc20000060000, irq=17 It claims to be a 5416, but I was under the impression that it was the 5418 that came with the MacBook Pro.