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Date:      Wed, 23 Nov 2005 21:17:26 -0800
From:      Julian Elischer <julian@elischer.org>
To:        Michael Vince <mv@roq.com>
Cc:        John Polstra <jdp@polstra.com>, net@freebsd.org, current@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject:   Re: em interrupt storm
Message-ID:  <43854CE6.6030200@elischer.org>
In-Reply-To: <43851A08.5080802@roq.com>
References:  <20051123030304.GA84202@xor.obsecurity.org>	<XFMail.20051122205449.jdp@polstra.com>	<20051123084653.GA90927@xor.obsecurity.org> <43851A08.5080802@roq.com>

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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.




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