From: Jens Axboe <[email protected]>
To: Dylan Yudaken <[email protected]>, Pavel Begunkov <[email protected]>
Cc: [email protected], [email protected]
Subject: Re: [PATCH] io_uring: calculate CQEs from the user visible value
Date: Tue, 08 Nov 2022 10:36:24 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On Tue, 8 Nov 2022 07:30:16 -0800, Dylan Yudaken wrote:
> io_cqring_wait (and it's wake function io_has_work) used cached_cq_tail in
> order to calculate the number of CQEs. cached_cq_tail is set strictly
> before the user visible rings->cq.tail
>
> However as far as userspace is concerned, if io_uring_enter(2) is called
> with a minimum number of events, they will verify by checking
> rings->cq.tail.
>
> [...]
Applied, thanks!
[1/1] io_uring: calculate CQEs from the user visible value
commit: 0fc8c2acbfc789a977a50a4a9812a8e4b37958ce
Best regards,
--
Jens Axboe
prev parent reply other threads:[~2022-11-08 17:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-08 15:30 [PATCH] io_uring: calculate CQEs from the user visible value Dylan Yudaken
2022-11-08 17:36 ` Jens Axboe [this message]
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