linux-kernel - Re: [PATCH V8] io_uring: releasing CPU resources when polling

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Message-ID: <293e5757-4160-4734-931c-9830df7c2f88@gmail.com>
Date: Wed, 25 Sep 2024 13:12:00 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: hexue <xue01.he@...sung.com>, axboe@...nel.dk
Cc: io-uring@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V8] io_uring: releasing CPU resources when polling

On 9/25/24 09:29, hexue wrote:
> On 24/08/12 1:59AM, hexue wrote:
>> This patch add a new hybrid poll at io_uring level, it also set a signal
>> "IORING_SETUP_HY_POLL" to application, aim to provide a interface for users
>> to enable use new hybrid polling flexibly.
> 
> Hi, just a gentle ping, is there still in merge window? or any comment for
> this patch?

I don't have a strong opinion on the feature, but the open question
we should get some decision on is whether it's really well applicable to
a good enough set of apps / workloads, if it'll even be useful in the
future and/or for other vendors, and if the merit outweighs extra
8 bytes + 1 flag per io_kiocb and the overhead of 1-2 static key'able
checks in hot paths.

-- 
Pavel Begunkov