Re: [PATCH 0/4] skb paged fragment destructors

From: Ian Campbell <redacted>
Date: Fri, 9 Dec 2011 13:47:07 +0000

If we had a concept like MAX_SKB_PAGES then it would perhaps make
sense to have + 2 there, but AFAICT drivers etc are already
accounting for this appropriately by adding a further + 2 (or
sometimes + 1) to MAX_SKB_FRAGS.

Any kind of code like this, including the "+ 2" in the skbuff header,
should be coded to use some kind of macro so we can track this
dependency instead of stumbling onto it and accidently breaking lots
of stuff if we want to change this "2" value.