Return-path: Received: from mail-yw0-f46.google.com ([209.85.213.46]:58800 "EHLO mail-yw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753739Ab0JER4A convert rfc822-to-8bit (ORCPT ); Tue, 5 Oct 2010 13:56:00 -0400 Received: by ywh1 with SMTP id 1so81284ywh.19 for ; Tue, 05 Oct 2010 10:55:59 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <4CAB64AD.4080105@candelatech.com> References: <4CAB59B2.5050106@candelatech.com> <4CAB5F3D.9060201@candelatech.com> <4CAB627F.8020804@candelatech.com> <4CAB64AD.4080105@candelatech.com> From: "Luis R. Rodriguez" Date: Tue, 5 Oct 2010 10:55:17 -0700 Message-ID: Subject: Re: memory clobber in rx path, maybe related to ath9k. To: Ben Greear Cc: "linux-wireless@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Oct 5, 2010 at 10:47 AM, Ben Greear wrote: > On 10/05/2010 10:43 AM, Luis R. Rodriguez wrote: >> >> On Tue, Oct 5, 2010 at 10:38 AM, Ben Greear >>  wrote: >>> >>> On 10/05/2010 10:36 AM, Luis R. Rodriguez wrote: >>>> >>>> On Tue, Oct 5, 2010 at 10:24 AM, Ben Greear >>>>  wrote: >>>>> >>>>> On 10/05/2010 10:16 AM, Luis R. Rodriguez wrote: >>>>>> >>>>>> On Tue, Oct 5, 2010 at 10:00 AM, Ben Greear >>>>>>  wrote: >>>>>>> >>>>>>> I started seeing this very soon after creating interfaces. >>>>>> >>>>>> Can you be more specific how one can reproduce? >>>>> >>>>> Enable SLUB debugging, DEBUG_PAGEALLOC (Debug page memory allocations), >>>>> lockdep, pre-empt. >>>> >>>> OK I just enabled PAGE_ALLOC thingy, it wasn't enabled on my kernel. >>>> >>>>> Please try creating a bunch of stations on one ath9k phy, >>>> >>>> How many? >>> >>> 130 is a nice round number :) >> >> Let me get this straight. You are creating 130 STAs with ath9k using >> iw, then running 150 instances of wpa_supplicant to connect to the >> same AP? > > Well, 130 instances, yes :) > >>> I'll try with a smaller number and see if I can hit it. >> >> Please do, you can use the log2n approach, should take you 7 tries, >> each by a power of 2, start at the middle of course. > > Sure...will be a few minutes. > > If it's any sane bug, then hopefully I can hit it with a small > number. > > Out of curiosity, is there any particular number of STAs > 1 you guys > test with? We don't test this :) Luis