From: Jens Axboe <[email protected]>
To: Josef <[email protected]>, io-uring <[email protected]>
Cc: [email protected]
Subject: Re: SQPOLL fd close(2) question
Date: Fri, 25 Sep 2020 11:56:12 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAAss7+rWKd7QCLaizuWa0dFETzzVajWR4Dw7g+ToC0LLHcA08w@mail.gmail.com>
On 9/25/20 10:21 AM, Josef wrote:
> Hi,
>
> I implemented SQPOLL in netty for 5.8/5.9, to close a fd I need to
> delete the entry first, it seems to fail with error -EADDRINUSE when I
> remove the fd entry, close(2) it and the same socket(with the same
> address) is created again,, is that known?
> I assume that io_uring still has some reference to this, however
> io_uring_unregister_files works fine but the drawback would be that I
> need to wait until the ring is idle
If you have a file registered, that holds a reference to it. So when
you then otherwise close it in the app, it's similar to having done
a dup() on it and just closing the original. So yes, this is known and
expected, I'm afraid.
--
Jens Axboe
next prev parent reply other threads:[~2020-09-25 17:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 16:21 SQPOLL fd close(2) question Josef
2020-09-25 17:56 ` Jens Axboe [this message]
2020-09-25 23:40 ` Josef
2020-09-26 10:53 ` Jens Axboe
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