linux-kernel - Re: [PATCH v2 net-next 3/4] net: introduce common dev_page_is

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Message-ID: <d8e86f1a-d2a6-d8af-142c-f735fd3be9f2@google.com>
Date:   Thu, 28 Jan 2021 14:48:43 -0800 (PST)
From:   David Rientjes <rientjes@...gle.com>
To:     Alexander Lobakin <alobakin@...me>
cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Dexuan Cui <decui@...rosoft.com>,
        Jakub Sitnicki <jakub@...udflare.com>,
        Marco Elver <elver@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
        linux-rdma@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 net-next 3/4] net: introduce common
 dev_page_is_reserved()

On Wed, 27 Jan 2021, Alexander Lobakin wrote:

> A bunch of drivers test the page before reusing/recycling for two
> common conditions:
>  - if a page was allocated under memory pressure (pfmemalloc page);
>  - if a page was allocated at a distant memory node (to exclude
>    slowdowns).
> 
> Introduce and use a new common function for doing this and eliminate
> all functions-duplicates from drivers.
> 
> Suggested-by: David Rientjes <rientjes@...gle.com>
> Signed-off-by: Alexander Lobakin <alobakin@...me>

Looks even better than I thought!

(Since all of the changes are in drivers/net/ethernet/, I assume 
everything directly or indirectly includes skbuff.h already.)

Acked-by: David Rientjes <rientjes@...gle.com>

Thanks for doing this.