Re: yongari nfe problems

On Wed, Apr 04, 2007 at 09:27:00PM +0200, Rainer Hurling wrote:
 > Pyun YongHyeon schrieb:
 > >On Tue, Apr 03, 2007 at 06:49:42PM +0200, Rainer Hurling wrote:
 > >
 > >[...]
 > > > 
 > > > In "man ehci(4)" I found:
 > > > 
 > > > -------
 > > > BUGS
 > > >      The driver is not finished and is quite buggy.
 > > >      There is currently no support for isochronous transfers.
 > > > -------
 > > > 
 > > > Possibly this could cause the observed "dropouts" of nfe0 from a few 
 > > > seconds till several minutes?
 > > > 
 > >
 > >I'm not familiar with ehci(4) but I think it has nothing to do with
 > >missing Tx completion interrupts observed on nfe(4).
 > >
 > > > 
 > > > Is there a knob or option in driver nfe(4) I can use to try classical 
 > > > polling or any 'lower' mode of operation?
 > > > 
 > >
 > >Add 'options DEVICE_POLLING' into kernel configuration file and
 > >rebuild your kernel. Use ifconfig(8) to enable/disable polling(4)
 > >feature.
 > >See polling(4) for more detailed description and tuning parameters.
 > >
 > 
 > Thank you for this hint. I compiled my kernel with 'options 
 > DEVICE_POLLING' and reboot.
 > 
 > For the first four hours I get no new watchdog timeouts. But then, 
 > without heavy load and without using usb devices, I get many timeouts.
 > 
 > Obiously nfe(4) does not support this polling feature? Or we are looking 
 > at the wrong side ...
 > 

Did you enable polling feature with ifconfig(8)?
(e.g. ifconfig nfe0 polling)
You should see POLLING in flags field in ifconfig output.

 > Rainer

-- 
Regards,
Pyun YongHyeon