linux-kernel - Re: rt2800usb: memory corruption?

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Message-Id: <1249194546.7634.4.camel@marge.simson.net>
Date:	Sun, 02 Aug 2009 08:29:06 +0200
From:	Mike Galbraith <efault@....de>
To:	Pavel Roskin <proski@....org>
Cc:	linux-wireless <linux-wireless@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"John W. Linville" <linville@...driver.com>
Subject: Re: rt2800usb: memory corruption?

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

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