[PATCH RFC POC 21/50] io_uring: commit fds per request

[sashiko-bot at kernel.org]

> io_uring requests don't complete on syscall exit of the task that
> submitted them. They complete:
> 
> - inline from io_uring_enter()
> - from task_work on any return to userspace
> - from io-wq workers and from the SQPOLL thread
> 
> The CQEs are visible to other threads before any syscall returns. So
> commit the reserved descriptors before the completion is posted. Commit
> them after ->issue() based on the request's result and before every CQE
> they post.
> 
> Nothing reachable from io_uring reserves yet. Once SCM_RIGHTS is
> converted this keeps IORING_OP_RECVMSG working from io-wq workers and
> the SQPOLL thread.
> 
> Signed-off-by: Christian Brauner (Amutable) <brauner at kernel.org>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/20260915-work-fd-reserve-unify-folded-v1-0-4d5217d6b246@kernel.org?part=21