Re: [UPDATE] Zerocopy patches, against 2.4.1-pre10

kuznet@ms2.inr.ac.ru
Thu, 25 Jan 2001 23:36:03 +0300 (MSK)


Hello!

> 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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