amd64/85451: 6.0-BETA3 lockups on AMD64

[Björn König]

Fernando Schapachnik wrote:
> [...]
> 
>  > Further testing: network activity locks up the machine, even the 
>  > output of a buildworld, or a few seconds of ping -f.
>  > 
>  > Without network activity, the machine is able to even buildworld.
>  
>  More: disabling PREEMPTION on the kernel config "solves" the
>  problem.

You told that the problems are related to network activity. Have you 
tried debug.mpsafenet="0" in /boot/loader.conf too? This might protect 
you from deadlocks, but may decrease performace.

Björn