netdev - Re: [PATCH v1 04/15] net: page_pool: create hooks for custom page providers

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Message-ID: <1dc75eee-e9f1-432c-aa89-d68e2c667eb5@gmail.com>
Date: Wed, 9 Oct 2024 23:02:55 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: Mina Almasry <almasrymina@...gle.com>, David Wei <dw@...idwei.uk>
Cc: io-uring@...r.kernel.org, netdev@...r.kernel.org,
 Jens Axboe <axboe@...nel.dk>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jesper Dangaard Brouer
 <hawk@...nel.org>, David Ahern <dsahern@...nel.org>
Subject: Re: [PATCH v1 04/15] net: page_pool: create hooks for custom page
 providers

On 10/9/24 21:49, Mina Almasry wrote:
> On Mon, Oct 7, 2024 at 3:16 PM David Wei <dw@...idwei.uk> wrote:
>>
>> From: Jakub Kicinski <kuba@...nel.org>
>>
>> The page providers which try to reuse the same pages will
>> need to hold onto the ref, even if page gets released from
>> the pool - as in releasing the page from the pp just transfers
>> the "ownership" reference from pp to the provider, and provider
>> will wait for other references to be gone before feeding this
>> page back into the pool.
>>
>> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
>> [Pavel] Rebased, renamed callback, +converted devmem
>> Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
>> Signed-off-by: David Wei <dw@...idwei.uk>
> 
> Likely needs a Cc: Christoph Hellwig <hch@....de>, given previous
> feedback to this patch?

I wouldn't bother, I don't believe it's done in good faith.

> But that's going to run into the same feedback again. You don't want
> to do this without the ops again?

Well, the guy sprinkles nacks as confetti, it's getting hard
to take it seriously. It's a net change, I'll leave it to the
net maintainers to judge.

-- 
Pavel Begunkov