Return-path: Received: from nf-out-0910.google.com ([64.233.182.190]:58239 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755978AbYIRU0A (ORCPT ); Thu, 18 Sep 2008 16:26:00 -0400 Received: by nf-out-0910.google.com with SMTP id d3so43379nfc.21 for ; Thu, 18 Sep 2008 13:25:58 -0700 (PDT) Message-ID: (sfid-20080918_222605_210924_832EAE85) Date: Thu, 18 Sep 2008 13:25:58 -0700 From: "Steven Noonan" To: "Justin Mattock" Subject: Re: [ath9k-devel] ath9k: massive unexplained latency in 2.6.27 (rc5, rc6, probably others) Cc: "Luis R. Rodriguez" , LKML , "Ingo Molnar" , linux-wireless , "ath9k-devel@lists.ath9k.org" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 References: <43e72e890809181134ybbec8fdxcb2a466aa17fe390@mail.gmail.com> <43e72e890809181142n7738cd99g522e6688e68d11ce@mail.gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Thu, Sep 18, 2008 at 1:18 PM, Justin Mattock wrote: > On Thu, Sep 18, 2008 at 12:23 PM, Steven Noonan wrote: >> On Thu, Sep 18, 2008 at 12:00 PM, Steven Noonan wrote: >>> On Thu, Sep 18, 2008 at 11:42 AM, Luis R. Rodriguez >>> wrote: >>>> On Thu, Sep 18, 2008 at 11:34 AM, Luis R. Rodriguez >>>>> irqpoll is a monster of evil and that should make your system crawl to >>>>> its knees. I would advise instead we work with you fixing the the >>>>> missed interrupts issue upon rmmod. >>>> >>>> Also, please provide the output of >>>> >>>> cat /proc/interrupts >>> >>> Note that the problem necessitating use of irqpoll in the first place >>> seems to only happen under certain conditions. I am unsure what these >>> conditions are. Before 'ath9k: connectivity is lost after Group >>> rekeying is done', I had used rmmod/modprobe as my solution to the >>> issue, which triggered the IRQ issue. >> >> I wonder if this is related: >> >> alcarin ~ # dmesg | grep GPE >> [ 0.166806] ACPI: EC: GPE = 0x17, I/O: command/status = 0x66, data = 0x62 >> [ 685.409077] ACPI: EC: GPE storm detected, disabling EC GPE > > FWIW, you might want to try this pach > in this thread: > http://www.gossamer-threads.com/lists/linux/kernel/966076 > I was receiving a disable irq #23 this patch"knock on wood", > seems to help with this issue. > Both the patches there affect EHCI, though. If I was having a USB controller fink out with "IRQ X: nobody cared", then that patch would probably indeed be applicable.