8-STABLE freezes on UDP traffic (DNS), 7.x doesn't

[Attila Nagy]

Mike Tancsa wrote:
> At 11:39 AM 3/25/2010, Michael Loftis wrote:
>> --On Thursday, March 25, 2010 3:22 PM +0100 Attila Nagy <bra at fsn.hu>
>> wrote:
>>
>> <...>
>>> Both unbound and python accepts DNS requests, and it seems when 25%
>>> interrupt happens, only unbound is in *udp state, where it is 50%, both
>>> programs are in that state.
>>
>> Try turning of hardware TSO/checksum offload if it's availble on your
>> chipset?  ifconfig <interface> -rxcsum -txcsum -tso -- I'm only using
>> nfe chips right now, but w/ the TSO/CSUM on they lock up constantly
>> under high load.  We're pretty sure it's mostly the nfe driver, or
>> the chips themselves, but have never ruled out some generic 8.x
>> hardware offload issues.
>
> There were also a bunch of commits last night for the bce driver.  If
> its the NIC in RELENG_8, perhaps those bug fixes might help
>
> <http://lists.freebsd.org/pipermail/svn-src-stable-8/2010-March/001804.html>http://lists.freebsd.org/pipermail/svn-src-stable-8/2010-March/001804.html
>
> http://lists.freebsd.org/pipermail/svn-src-stable-8/2010-March/001803.html
>
I saw them, but they didn't seem to be related. I've just tested it, and
my assumptions were correct. A fresh 8-STABLE also freezes.