Return-path: Received: from mail.candelatech.com ([208.74.158.172]:52497 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755244Ab0JERr1 (ORCPT ); Tue, 5 Oct 2010 13:47:27 -0400 Message-ID: <4CAB64AD.4080105@candelatech.com> Date: Tue, 05 Oct 2010 10:47:25 -0700 From: Ben Greear MIME-Version: 1.0 To: "Luis R. Rodriguez" CC: "linux-wireless@vger.kernel.org" Subject: Re: memory clobber in rx path, maybe related to ath9k. References: <4CAB59B2.5050106@candelatech.com> <4CAB5F3D.9060201@candelatech.com> <4CAB627F.8020804@candelatech.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: 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? Thanks, Ben > > Luis -- Ben Greear Candela Technologies Inc http://www.candelatech.com