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From: Vivek Khera <vivek@khera.org>
Date: Tue, 24 May 2005 10:18:02 -0400
To: freebsd-stable@freebsd.org
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Subject: Re: em and bge driver MPSAFE?
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On May 23, 2005, at 11:55 PM, Sergey N. Voronkov wrote:

> Probably You are wrong at least about em driver: it steel makes  
> page faults
> in kernel mode on my Dual Xeon machine. :-(
>
> "debug.mpsafenet=0" fix this issue completely.
>

I had the opposite experience.  the bge driver would regularly lock  
up my machine under heavy load. Switching to em interfaces resulted  
in a 100% stable machine.  But I'm also wondering if the recent fix  
to the SMP opteron locking up issue was the real cause.  No way to  
tell since these boxes are in production now...

Vivek Khera, Ph.D.
+1-301-869-4449 x806