From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org, Keith Busch <kbusch@meta.com>
Cc: superman.xpt@gmail.com, Keith Busch <kbusch@kernel.org>
Subject: Re: [PATCHv2] io_uring: consistently use rcu semantics with sqpoll thread
Date: Wed, 11 Jun 2025 15:01:23 -0600 [thread overview]
Message-ID: <174967568374.462788.11409454167475921556.b4-ty@kernel.dk> (raw)
In-Reply-To: <20250611205343.1821117-1-kbusch@meta.com>
On Wed, 11 Jun 2025 13:53:43 -0700, Keith Busch wrote:
> The sqpoll thread is dereferenced with rcu read protection in one place,
> so it needs to be annotated as an __rcu type, and should consistently
> use rcu helpers for access and assignment to make sparse happy.
>
> Since most of the accesses occur under the sqd->lock, we can use
> rcu_dereference_protected() without declaring an rcu read section.
> Provide a simple helper to get the thread from a locked context.
>
> [...]
Applied, thanks!
[1/1] io_uring: consistently use rcu semantics with sqpoll thread
commit: 89f607e88c9f885187a0144d0b540fb257b912ea
Best regards,
--
Jens Axboe
next prev parent reply other threads:[~2025-06-11 21:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-11 20:53 [PATCHv2] io_uring: consistently use rcu semantics with sqpoll thread Keith Busch
2025-06-11 21:01 ` Jens Axboe [this message]
2025-06-12 14:18 ` Jens Axboe
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