if_de problem w/out Giant (was: Re: Weird network traffic issue with FreeBSD-5.3-Beta 5)

Robert Watson rwatson at freebsd.org
Sat Sep 25 10:28:23 PDT 2004

On Sat, 25 Sep 2004, Robert Watson wrote:

> On Fri, 24 Sep 2004, Forrest Aldrich wrote:
> > I'm using a de0 interface (100TX) -- if I try to cvsup, it is dead slow
> > -- however, if I put the interface into promiscuous mode, in another
> > screen, it starts working fast. 
> > 
> > I don't understand what could be wrong.  I've hit a bug? 
> There appears to be a problem with if_de when running Giant-free.  Until
> it is fixed, you can set debug.mpsafenet=1 in /boot/loader.conf.  While
> this will make some other elements of the stack run slower, the net
> improvement if de0 is your interface of interest will more than make up
> for it.  I have found an if_de card and once I return to Washington, DC
> tomorrow, I'll sit down and figure it out. 

Sorry, the boave should read:

  Until it is fixed, you can set debug.mpsafenet=0 in /boot/loader.conf. 

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org      Principal Research Scientist, McAfee Research

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