netdev - Re: [PATCH net-next v3 0/5] page

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Date:   Mon, 10 May 2021 10:20:10 +0800
From:   Yunsheng Lin <linyunsheng@...wei.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
CC:     Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Matteo Croce <mcroce@...ux.microsoft.com>,
        <netdev@...r.kernel.org>, <linux-mm@...ck.org>,
        Ayush Sawal <ayush.sawal@...lsio.com>,
        Vinay Kumar Yadav <vinay.yadav@...lsio.com>,
        Rohit Maheshwari <rohitm@...lsio.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "Thomas Petazzoni" <thomas.petazzoni@...tlin.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Russell King <linux@...linux.org.uk>,
        Mirko Lindner <mlindner@...vell.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Tariq Toukan <tariqt@...dia.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        "Alexei Starovoitov" <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        "John Fastabend" <john.fastabend@...il.com>,
        Boris Pismenny <borisp@...dia.com>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
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        Vlastimil Babka <vbabka@...e.cz>, Yu Zhao <yuzhao@...gle.com>,
        Will Deacon <will@...nel.org>,
        Michel Lespinasse <walken@...gle.com>,
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        Jonathan Lemon <jonathan.lemon@...il.com>,
        Alexander Lobakin <alobakin@...me>,
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        Jakub Sitnicki <jakub@...udflare.com>,
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        Willem de Bruijn <willemb@...gle.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Guillaume Nault <gnault@...hat.com>,
        <linux-kernel@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
        <bpf@...r.kernel.org>, Matthew Wilcox <willy@...radead.org>,
        Eric Dumazet <edumazet@...gle.com>,
        David Ahern <dsahern@...il.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Saeed Mahameed <saeedm@...dia.com>,
        Andrew Lunn <andrew@...n.ch>, Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net-next v3 0/5] page_pool: recycle buffers

On 2021/5/7 18:19, Jesper Dangaard Brouer wrote:
> On Fri, 7 May 2021 16:28:30 +0800
> Yunsheng Lin <linyunsheng@...wei.com> wrote:
> 

[...]

> 
> I'm actually not against storing page_pool object ptr directly in
> struct-page.  It is a nice optimization.  Perhaps we should implement
> this optimization outside this patchset first, and let __xdp_return()
> for XDP-redirected packets also take advantage to this optimization?
> 
> Then it would feel more natural to also used this optimization in this
> patchset, right?

Yes, it would be good if XDP can take advantage of this optimization too.

Then it seems we can remove the "mem_id_ht"? if we want to support different
type of page pool in the future, the type field is in the page pool too
when page_pool object ptr directly in struct-page.

>