Subject: Re: [PATCH net-next 06/11] net: page_pool: avoid calling no-op externals when possible

From: Christoph Hellwig <[email-masked]>
Date: Wed, 17 May 2023 10:14:58 +0200

So while this looks ok, Eric Dumazet had looked into some optimization
for this touching the core code, and promised me to come up with an
even better version a while ago.  Eric, what's the state of your
optimizations for no-op DMA syncs?