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Date: Wed, 17 May 2023 10:14:58 +0200
From: Christoph Hellwig <hch@lst.de>
To: Alexander Lobakin <aleksander.lobakin@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
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	Michal Kubiak <michal.kubiak@intel.com>,
	Larysa Zaremba <larysa.zaremba@intel.com>,
	Jesper Dangaard Brouer <hawk@kernel.org>,
	Ilias Apalodimas <ilias.apalodimas@linaro.org>,
	Christoph Hellwig <hch@lst.de>, netdev@vger.kernel.org,
	intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next 06/11] net: page_pool: avoid calling no-op
 externals when possible
Message-ID: <20230517081458.GA32192@lst.de>
References: <20230516161841.37138-1-aleksander.lobakin@intel.com> <20230516161841.37138-7-aleksander.lobakin@intel.com>
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	lindbergh.monkeyblade.net

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?