Re: GRO aggregation

On Thu, Sep 13, 2012 at 11:11 AM, Eric Dumazet [off-list ref] wrote:

MAX_SKB_FRAGS is 16
skb_gro_receive() will return -E2BIG once this limit is hit.
If you use a MSS = 100 (instead of MSS = 1460), then GRO skb will
contain only at most 1700 bytes, but TSO packets can still be 64KB, if
the sender NIC can afford it (some NICS wont work quite well)

Hi Eric,

Addressing this assertion of yours, Shlomo showed that with ixgbe he managed
to see GRO aggregating 32KB which means 20-21 packets that is > 16 fragments
in this notation, can it be related to the way ixgbe is actually
allocating skbs?

Or.