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To: Michael Vince <mv@roq.com>
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Cc: John Polstra <jdp@polstra.com>, net@freebsd.org, current@freebsd.org,
	Kris Kennaway <kris@obsecurity.org>
Subject: Re: em interrupt storm
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Michael Vince wrote:

> Kris Kennaway wrote:
>
>>
>>
> This is Intels latest server chipset designs and Dell are putting that 
> chipset in all their servers.
> Luckily I haven't not seen the problem on any of my Dell servers (as 
> long as I am looking at this right).
>

I just tried intel's latest em driver (3.2.18) with 6 interfaces on a 
4.10 system on a dell 2850 server.
(E7525 chipset I think)
The result was the system hanging (couldn't do anything other than enter 
the debugger).
backtraces showed tight loops in the em interrupt routines.

Not sure if it's related yet.