Re: proposed optimization for network drivers

From: Don Cohen (don-linux@isis.cs3-inc.com)
Date: Fri Apr 18 2003 - 10:37:01 EST


In part I agree. I would have preferred to make my change in one
place instead of one driver at a time. On the other hand, it seems to
me that some of these details are already spread around all the
drivers. For instance, why does every driver have to call
eth_type_trans? Could that be delayed for netif_rx ?

I do think it's reasonable for a driver to test whether the upper
layers are ready to process another packet. I suggest that this
test be encapsulated into a new function that can be changed at the
cost of only recompiling all the drivers.

David S. Miller writes:
>
> What is we change the congestion implementation? Then we'll
> have to edit every single driver. I don't think that's very
> maintainable.
>
> The whole idea is to abstract things out as far as possible so that
> the device drivers are totally agnostic about the details of the
> generic network queueing implementation.
>
> I mean, it's an interesting idea, but it exposes details that
> should not be exposed.
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