netdev - Re: [PATCH net-next 2/3] net: skbuff: cache one skb

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Message-ID: <21e4b97a-430f-832d-cf49-5f938d1a8b77@gmail.com>
Date:   Wed, 15 Feb 2023 15:37:44 +0000
From:   Edward Cree <ecree.xilinx@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>, davem@...emloft.net
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com,
        willemb@...gle.com, fw@...len.de
Subject: Re: [PATCH net-next 2/3] net: skbuff: cache one skb_ext for use by
 GRO

On 15/02/2023 03:43, Jakub Kicinski wrote:
> On the driver -> GRO path we can avoid thrashing the kmemcache
> by holding onto one skb_ext.

Hmm, will one be enough if we're doing GRO_NORMAL batching?
As for e.g. UDP traffic up to 8 skbs (by default) can have
 overlapping lifetimes.