Return-path: Received: from mail-iw0-f174.google.com ([209.85.214.174]:57056 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751800Ab0JERns convert rfc822-to-8bit (ORCPT ); Tue, 5 Oct 2010 13:43:48 -0400 Received: by iwn5 with SMTP id 5so8585558iwn.19 for ; Tue, 05 Oct 2010 10:43:48 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <4CAB627F.8020804@candelatech.com> References: <4CAB59B2.5050106@candelatech.com> <4CAB5F3D.9060201@candelatech.com> <4CAB627F.8020804@candelatech.com> From: "Luis R. Rodriguez" Date: Tue, 5 Oct 2010 10:43:27 -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 10:38 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? > 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. Luis