[Panic] Dummynet/IPFW related recurring crash.

[Pawel Tyll]

> Same backtrace as reported here?
I'm unable to get the new backtrace, but judging from what I can see
on the console pre-reboot, it's exactly the same deal since
8.0-RELEASE - panic with dummynet as main star.

> What revision of the em(4) driver code are you using? I know Jack has
> been working out certain quirky issues lately, and there have been
> updates to the code since last you posted an update to your problem.
em0: <Intel(R) PRO/1000 Network Connection 7.1.8> port 0x2040-0x205f mem 0xb1a00000-0xb1a1ffff,0xb1a25000-0xb1a25fff irq 20 at device 25.0 on pci0
em0: Using an MSI interrupt
em0: [FILTER]
em0: Ethernet address: 00:15:17:...
em1: <Intel(R) PRO/1000 Network Connection 7.1.8> port 0x1000-0x101f mem 0xb1900000-0xb191ffff,0xb1920000-0xb1923fff irq 16 at device 0.0 on pci2
em1: Using MSIX interrupts with 3 vectors
em1: [ITHREAD]
em1: [ITHREAD]
em1: [ITHREAD]
em1: Ethernet address: 00:15:17:..

> Maybe Jack could shed some light on the whether the updates could
> somehow work out to be a fix for your problem -- or whether or not
> your issue is even related to the em(4) driver.
I'm not sure anymore that em is at fault here. Anyway, currently I'm
running FreeBSD 8.2-PRERELEASE #1: Fri Jan  7 17:19:28. If something
happened since then that could fix this, I'll gladly update.