From: Ben Hutchings <redacted>
Date: Mon, 4 Nov 2013 16:55:30 +0000

On Sat, 2013-11-02 at 12:58 -0700, Eric Dumazet wrote:

quoted

From: Eric Dumazet <edumazet@google.com>

Christoph Paasch and Jerry Chu reported crashes in skb_segment() caused
by commit 8a29111c7ca6 ("net: gro: allow to build full sized skb")

skb_segment() only deals with a frag_list chain containing MSS sized
fragments. Even if we fix this problem, its better if GRO layer
doesn't build skb with a frag_list in the first place, to let TSO
packets reaching output devices.
 
David Miller and Ben Hutchings suggested we keep track of number of
forwarding users to be able to :

- Disable LRO
- Make sure GRO layer do not use skb frag_list to extend skb capacity

Note that after this patch, LRO is automatically re-enabled if
forwarding is disabled on the device, or if a device is removed
from a bridge.

[...]

Reviewed-by: Ben Hutchings <redacted>

Applied, thanks everyone.