9.1-REL Supermicro H8DCL-iF kernel panic

[Xin Li]

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On 4/1/13 12:04 AM, Ryan McIntosh wrote:
> This has been brought up before for a different board, none
> specifically mentioned this one nor the if_em driver (it was if_igb
> before on a X8DTU-6+ board).
> 
> References: 
> http://lists.freebsd.org/pipermail/freebsd-stable/2011-September/063958.html
>
> 
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/172113
> 
> Panic image from H8DCl-iF: 
> http://nitemail.net/img/crash91-h8dcl-if.png
> 
> Original image from X8DTU-6+: 
> http://www.grosbein.net/img/crash-91rc.png
> 
> While I'd love to try out some fixes myself however I don't have a
> ton of time with this system in my hands to be developed on. Jack
> (as referenced in the kernel pr) felt that it was too few system
> specific to go further with the issue as per the last response.
> 
> I would be more than happy to assist or even lend remote access to
> this machine to figure out just what's causing the problem if
> anyone is up for the task, but I will only have about 3-4 days with
> it. I have confirmed dumping msix on the boot loader will permit
> the system to boot up and function, however horridly slow (6gbps
> drives pushing 8mbyte/sec isnt even usable). Maybe there's a
> grander problem here.. with supermicro? Let me know, I'll happily
> test whatever if it benefits the community.

I tend to agree with John's patch (on Feb 21, 2013 on kern/172113),
will you have a chance to test it?

(My thought is that we should probably just initialize
adapter->rx_mbuf_sz = MCLBYTES; in _attach() right after adapter->dev
assignment?)

Cheers,
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