From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org, Woraphat Khiaodaeng <worapat.kd2@gmail.com>
Cc: Jens Axboe <axboe@kernel.dev>
Subject: Re: [PATCH] io_uring: restore RCU read section in io_req_local_work_add()
Date: Thu, 9 Jul 2026 11:46:00 -0600 [thread overview]
Message-ID: <87cedd37-0f88-40c0-90d9-65b78d4f69a6@kernel.dk> (raw)
In-Reply-To: <178361907941.14321.2989447050307137432.b4-ty@b4>
On 7/9/26 11:44 AM, Jens Axboe wrote:
>
> On Thu, 09 Jul 2026 10:51:00 +0700, Woraphat Khiaodaeng wrote:
>> The task-work refactor that moved io_req_local_work_add() out of
>> io_uring.c into the new io_uring/tw.c dropped the whole-body guard(rcu)()
>> that used to cover the function body.
>>
>> For DEFER_TASKRUN rings the ring teardown still relies on that RCU read
>> section pairing with its grace period:
>>
>> [...]
>
> Applied, thanks!
>
> [1/1] io_uring: restore RCU read section in io_req_local_work_add()
> commit: 648790e0952789527ec68548edbedbc0fcff43b5
Side note: with your patch applied, we can also do:
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git/commit/?h=io_uring-7.2&id=f3176c8ac4217c88fe1147ab084c47092921ffc4
as io_ctx_mark_taskrun() is no longer called outside the RCU read side
lock anymore. So I did that on top.
--
Jens Axboe
prev parent reply other threads:[~2026-07-09 17:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-09 3:51 [PATCH] io_uring: restore RCU read section in io_req_local_work_add() Woraphat Khiaodaeng
2026-07-09 17:44 ` Jens Axboe
2026-07-09 17:46 ` Jens Axboe [this message]
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