Return-path: Received: from mail.gmx.net ([213.165.64.20]:35983 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751711AbZHBG3K (ORCPT ); Sun, 2 Aug 2009 02:29:10 -0400 Subject: Re: rt2800usb: memory corruption? From: Mike Galbraith To: Pavel Roskin Cc: linux-wireless , LKML , "John W. Linville" In-Reply-To: <1249190209.7486.4.camel@marge.simson.net> References: <1248945770.7910.24.camel@marge.simson.net> <1248946195.8925.9.camel@johannes.local> <1248947099.8396.6.camel@marge.simson.net> <1248947740.8925.12.camel@johannes.local> <1248948326.8823.4.camel@marge.simson.net> <1248955916.7995.47.camel@marge.simson.net> <1249104348.7146.60.camel@marge.simson.net> <1249124154.8236.5.camel@marge.simson.net> <1249172514.3043.7.camel@ct> <1249190209.7486.4.camel@marge.simson.net> Content-Type: text/plain Date: Sun, 02 Aug 2009 08:29:06 +0200 Message-Id: <1249194546.7634.4.camel@marge.simson.net> Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Sun, 2009-08-02 at 07:16 +0200, Mike Galbraith wrote: > On Sat, 2009-08-01 at 20:21 -0400, Pavel Roskin wrote: > > On Sat, 2009-08-01 at 12:55 +0200, Mike Galbraith wrote: > > > > > Enabled slub/pagealloc debugging. First down/rmmod said... > > > > I suggest that you try kmemcheck. It's very slow, but it finds memory > > problems when they occur, not when it's too late. > > > > You may want to disable kmemleak and framebuffer support and make sure > > that X doesn't start, at it will be too slow. Slub debugging might > > conflict with kmemcheck, so it's better to disable it. > > > I didn't even get as far as down/rmmod. Kmemcheck fired as soon as the > interface came up. Corruption seems to be SMP only. I cycled down/rmmod/modprobe a few times with kmemcheck enabled (disables smp unfortunately), kmemcheck didn't trigger, nor did box have a conniption. -Mike