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

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Message-ID: <20230518080219.109675cc@kernel.org>
Date:   Thu, 18 May 2023 08:02:19 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Alexander Lobakin <aleksander.lobakin@...el.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Magnus Karlsson <magnus.karlsson@...el.com>,
        Michal Kubiak <michal.kubiak@...el.com>,
        Larysa Zaremba <larysa.zaremba@...el.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        "Ilias Apalodimas" <ilias.apalodimas@...aro.org>,
        Christoph Hellwig <hch@....de>, <netdev@...r.kernel.org>,
        <intel-wired-lan@...ts.osuosl.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 06/11] net: page_pool: avoid calling no-op
 externals when possible

On Thu, 18 May 2023 15:34:44 +0200 Alexander Lobakin wrote:
> And seems like I didn't get the sentence regarding "allocate and throw"
> :s This condition just disables the shortcut if any new page suddenly
> requires real DMA syncs (and if it does, then the sync a line below will
> take way more time than 1 more `if`  anyway).

Right, I misread.