b43 error under heavy load

[Chris Vine]

On Wed, 1 Jun 2011 12:56:22 +0200
Rafał Miłecki <zajec5 at gmail.com> wrote:
> 2011/6/1 Chris Vine <chris at cvine.freeserve.co.uk>:
> > On Wed, 1 Jun 2011 11:23:45 +0200
> > Rafał Miłecki <zajec5 at 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