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Date: Mon, 7 Apr 2003 17:41:06 -0700 (PDT)
From: Nate Lawson <nate@root.org>
To: Maxime Henrion <mux@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/dev/fxp if_fxp.c
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On Mon, 7 Apr 2003, Nate Lawson wrote:
> On Mon, 7 Apr 2003, Jake Burkholder wrote:
> > Apparently, On Mon, Apr 07, 2003 at 10:02:44AM -0700,
> > 	Maxime Henrion said words to the effect of;
> > 
> > >   Modified files:
> > >     sys/dev/fxp          if_fxp.c 
> > >   Log:
> > >   Correct the maxsize and maxsegsz parameters for the
> > >   bus_dma_tag_create() calls.  Without this, fxp(4) + PAE
> > >   would consume insane amounts of bounce pages.
> > 
> > Cool, thanks.  Actually it didn't allocate enough bounce pages, so it would
> > get ENOMEM from busdma when trying to map mbufs; maxsize was too small.
> > 
> > Jake
> 
> I was getting this in actual testing.  Eventually mapping an mbuf returned
> ENOMEM and all transmits/receives from my box would halt.  I'm testing
> again with this change and it seems to be working ok again.
> 
> -Nate

Oops, things still hang although it takes longer.  The current version
does not work.  To test, try:

  dd if=/dev/zero bs=1m | ssh -c arcfour stable-site 'cat > /dev/null'

After a minute or two, all network traffic on fxp hangs.  If I down and
then up the interface, it starts working again (transfers in progress
resume also).  No errors or console messages, just traffic stops running
for a while.  Please fix this.

-Nate