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Date: Wed, 4 May 2011 15:00:16 +0800
From: Alastair Hogge <agh@fastmail.fm>
To: Michael Schmiedgen <schmiedgen@gmx.net>
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Cc: Olivier Smedts <olivier@gid0.org>, Mike Tancsa <mike@sentex.net>,
	Jack Vogel <jfvogel@gmail.com>,
	FreeBSD current mailing list <current@freebsd.org>
Subject: Re: problems with em(4) since update to driver 7.2.2
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On Tue, May 03, 2011 at 11:50:53PM +0200, Michael Schmiedgen wrote:
> On 03.05.2011 23:24, Jack Vogel wrote:
> > If you get the setup receive structures fail, then increase the nmbclusters.
> >
> > If you use standard MTU then what you need are mbufs, and standard size
> > clusters (2K).
> > Only when you use jumbo frames will you need larger.
> >
> > You must configure enough, its that simple.
> 
> I doubled the nmbclusters as well. But nothing happened.
> 
> I have no load on this machine and nothing special
> configured.
> 
> Thanks,
>    Michael

Just a me too. I've been following -CURRENT(r221415) but I keep 
/sys/dev/e1000 at r218909 to keep em0 working without problems on -CURRENT.

I also tried 2x, & 4x 25600 for max mbuff clusters via kern.ipc.nmbclusters.
This didn't help.

-alastair