Re: [PATCH] net: mv643xx_eth: Add GRO support

From: Eric Dumazet
Date: Thu Apr 11 2013 - 12:10:59 EST

On Thu, 2013-04-11 at 18:02 +0200, Willy Tarreau wrote:

> OK, that makes sense indeed, I didn't think about this case. All
> I remember was that the old call achieved a higher packet rate
> than napi_gro_receive, but it was on an older kernel and I can't
> be more specifics after several months :-/

Its probably true that the GRO handler consumes more cpu for packets
that cant be aggregated in the end.

Thats a trade off, and maybe we could add in the core stack a device
feature to instruct gro handler to do a short cut for packets with no
checksum. Or better a sysctl so that a static_branch can be used.

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