Michael Chan wrote:
On Thu, 2007-04-12 at 16:50 +0200, Andi Kleen wrote:
Jamie webb <[EMAIL PROTECTED]> writes:
Hi there
I have a Dell PE860 with built-in BCM5721, which is reported as
working fine with the tg3 driver, however I have been getting sporadic
data corruption, mostly evident as SSH MAC errors.
FWIW i also saw this (data corruption with tg3) occasionally,
but never repeatable or with a packet dump.
My suggestion is to try turning tx checksum off (ethtool -K eth0 tx off)
to see if it makes a difference. I'm not aware of checksum problem on
5721, but it is worth trying. See if the other end is reporting TCP
checksum errors also.
Well, so far so good. I'll let you know if it happens again, but it
looks like that's fixed it.
Further testing showed that I also had to disable rx checksumming,
otherwise I was getting random kernel crashes. Presumably it was not
only reading data from random memory locations, but also writing in the
wrong place...
So, do I understand correctly that this is causing the CPU rather than
the NIC to do the checksumming?
Is this a reasonable permanent solution?
Crashing aside, I'm a little nervous about putting into production a box
that might for example randomly decide to serve up its SSL private keys
halfway through an email message...
Cheers
/J
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