Re: Strange TCP problem with awge0

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

Martin Husemann wrote:
>On Fri, Jan 02, 2015 at 11:45:16AM -0800, Dennis Ferguson wrote:
>> tcpdump thinks those packets have correct checksums too, so the
>> next guess might be that the software checksum function being used
>> in the packet processing path to check the checksum has a bug.  It
>> might also be related to how the packet ends up being stored in its
>> mbuf.
>
>I disabled all hardware checksums on another arm SoC and can't reproduce
>that problem there. I also do not have the special cortex/NEON checksum
>enabled (no option NEON_IN_CKSUM).

There have been problems seen recently using software checksums on
amd64 and sparc64.

These cases were hard to reproduce and caused panics, maybe you have
found a better way to track down the same bug.

Robert Swindells