IPv4 checksum oddness (gcc compiler bug?)

[Giorgos Keramidas]

On 2004-08-24 22:52, Mike Bristow <mike at urgle.com> wrote:
> Hi,
>
> I've been suffering from really horrid (~60-70%) packet loss for a while,
> but only with IPv4.
>
> I've spent some time thinking I had a hardware problem, as it started
> at the same time as changed some networking bits but it doesn't
> appear to be the case:  older (5.2.1) version of FreeBSD don't have
> this problem.
> [...]
> I've just cvsuped to RELENG_5 box (cvsup'ed with tag=RELENG_5
> date=2004.08.24.00.00.00), [...]
> The kernel is GENERIC; possibly interesting other facts include:

Did you by any chance compile the userland and/or kernel with CFLAGS or
COPTFLAGS set to something non-default in your /etc/make.conf?