em(4) interface hangs under 8.0-RELEASE

[Max Laier]

On Sunday 07 March 2010 00:32:21 Jeremy Chadwick wrote:
> On Sat, Mar 06, 2010 at 02:56:07PM -0800, Nick Rogers wrote:
> > ALTQ + RELENG_8 + em(4) will not work at the moment. It does not matter
> > what your PF ruleset looks like or how much traffic you are pushing. The
> > packets that transit the em interface simply never make it to the ALTQ
> > queues (not even the interface's root queue). Thus any kind of bandwidth
> > rate limiting or whatever you are doing will not work.
> >
> > This was fixed by the following commit. I think its supposed to MFC soon?
> > http://svn.freebsd.org/viewvc/base?view=revision&revision=203834
> 
> Nick, thanks for pointing me to this.  I'll hold off on doing our
> upgrade (on that one server) until said code is backported to RELENG_8.
> 
> Max, will this be MFC'd in about a week?  Usually things of this sort
> MFC'd after 4 weeks, but I thought I'd get confirmation.

As noted in the commit message, I do indeed plan to MFC this in about a week.  
There are two remaining issues in some drivers that may result in packet 
reordering (w/ or w/o ALTQ).  I was hoping to address this before the MFC, but 
I didn't yet find the time.

Regards,
  Max