Merge branch 'optimise-local-cpu-skb_attempt_defer_free'

Merge branch 'optimise-local-cpu-skb_attempt_defer_free'

Pavel Begunkov says:

====================
optimise local CPU skb_attempt_defer_free

Optimise the case when an skb comes to skb_attempt_defer_free()
on the same CPU it was allocated on. The patch 1 enables skb caches
and gives frags a chance to hit the page pool's fast path.
CPU bound benchmarking with perfect skb_attempt_defer_free()
gives around 1% of extra throughput.
====================

Link: https://lore.kernel.org/r/cover.1712711977.git.asml.silence@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>