> Starfire card does, maybe the 3com is different. :-)
3com _is_ different. 8)
I is not an issue, we do not make zerocopy on IP fragments.
> Are we even bothering with the partial checksums at this point, or
> are we falling back to CPU checksumming if the packet is fragmented?
Of course, we are not bothering.
> And, on a related note: what's involved in making a driver
> zerocopy-aware? I haven't looked too closely to the current patch,
> but I was thinking of playing with the starfire driver, since I
> have all the chipset docs..
Nothing especially clever. Gather plus checksumming, as described
in comment in linux/netdevice.h. Well, just look into one of existing
drivers: better, sunhme. 3com and acenic are too stupid to learn something.
Alexey
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