Re: [Xen-devel] compound skb frag pages appearing in start_xmit

[Eric Dumazet <eric.dumazet@xxxxxxxxx>]

On Tue, 2012-10-09 at 15:17 +0100, Ian Campbell wrote:

> Does the higher order pages effectively reduce the number of frags which
> are in use? e.g if MAX_SKB_FRAGS is 16, then for order-0 pages you could
> have 64K worth of frag data.
> 
> If we switch to order-3 pages everywhere then can the skb contain 512K
> of data, or does the effective maximum number of frags in an skb reduce
> to 2?

effective number of frags reduce to 2 or 3

(We still limit GSO packets to ~63536 bytes)



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