Subject: 3.0_BETA panic kills the network
To: None <>
From: Stephen Borrill <>
List: netbsd-users
Date: 10/21/2005 17:20:14
My 3.0_BETA i386 box with i82550 network (fxp0) occasionally panics. When 
it does so, the port light on my switch flashes like mad and the whole 
network grinds to a halt.

trace says (from handwritten notes):

kernel: page fault trap code=0
Stopped at netbsd:llcintr+0xcc: movzbl 0x2(%edi),%eax
llcintr(x0f98e00,c01022cd,c0f98e00,c0102bde,4a360010) at netbsd:llcintr+0xcc
ccitintr(4a360010,20030,27bc0010,10,c08f4000) at netbsd:ccittintr+0x35
DDB lost frame for netbsd:Xsoftnet+0x82 trying 0xc08f7e80
Xsoftnet() at netbsd:Xsoftnet+0x82
--- interrupt ---

As soon as I type reboot, the network starts working again. Last time it 
died, I tried tcpdumping on another machine, but didn't see anything.

This machine's been running 1.6 for years without any downtime.