From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Vine <chris@cvine.freeserve.co.uk>
Date: Wed, 1 Jun 2011 13:08:42 +0100
Subject: b43 error under heavy load
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Cc: Larry Finger <Larry.Finger@lwfinger.net>, wireless <linux-wireless@vger.kernel.org>, Michael =?ISO-8859-1?B?QvxzY2g=?= <mb@bu3sch.de>, b43-dev <b43-dev@lists.infradead.org>

On Wed, 1 Jun 2011 12:56:22 +0200
Rafa? Mi?ecki <zajec5@gmail.com> wrote:
> 2011/6/1 Chris Vine <chris@cvine.freeserve.co.uk>:
> > On Wed, 1 Jun 2011 11:23:45 +0200
> > Rafa? Mi?ecki <zajec5@gmail.com> wrote:
> >> AFAIK to enable this debugging you only need to:
> >> echo 1 > /sys/kernel/debug/b43/phy0/debug_dmaverbose
> >
> > I don't have a /sys/kernel/debug directory with a running 3.0.0-rc1
> > kernel, so it appears that b43 debugging (which I do have enabled)
> > doesn't use it.
> 
> mount -t debugfs none /sys/kernel/debug/

Ah, so I need to compile in debugfs.  That isn't/wasn't necessary for
the DMA error debugging.  I am surprised that debugfs enables you to
alter kernel debugging levels on the fly (I thought it was a
passive logging mechanism for kernel state), but you live and learn.

I will compile in debugfs, but I don't expect to have any rapid results
for you. With 3 and a half hours of streaming yesterday it happened
once.  I won't be able to do much testing by way of transferring files
over the LAN for a while either (I imagine that would provide greater
stress testing).

Chris