linux-kernel - Re: [PATCH net-next v5 01/14] page_pool: make sure frag API fields don't span between cachelines

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Message-ID: <20231126145457.400726e4@kernel.org>
Date:   Sun, 26 Nov 2023 14:54:57 -0800
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>,
        Michal Kubiak <michal.kubiak@...el.com>,
        Larysa Zaremba <larysa.zaremba@...el.com>,
        Alexander Duyck <alexanderduyck@...com>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        David Christensen <drc@...ux.vnet.ibm.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Paul Menzel <pmenzel@...gen.mpg.de>, netdev@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v5 01/14] page_pool: make sure frag API fields
 don't span between cachelines

On Fri, 24 Nov 2023 16:47:19 +0100 Alexander Lobakin wrote:
> -	long frag_users;
> +	long frag_users __aligned(4 * sizeof(long));

A comment for the somewhat unusual alignment size would be good.