On 23 August 2010 06:27, Pyun YongHyeon <pyu...@gmail.com> wrote:

> I recall there was SIOCSIFCAP ioctl handling bug in bce(4) on 8.0 so
> it might also disable IFCAP_TSO4/IFCAP_TXCSUM/IFCAP_RXCSUM when yo
> disabled RX checksum offloading. But I can't explain how checksum
> offloading could be related with the growth of 4k jumbo buffers.

Neither can I!

I'm trying to come up with a reproduction method that doesn't involve
"put box on the internet, push clients through it, wait."

> There was a lot of changes in bce(4) since 8.0-RELEASE. I vaguely
> guess your issue could be related with header split feature of
> bce(4) which was now disabled. Are you using jumbo
> frame/ZERO_COPY_SOCKETS with bce(4)?

Nope.




Adrian
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