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From: Pavel Begunkov <asml.silence@gmail.com>
To: Jens Axboe <axboe@kernel.dk>, io-uring <io-uring@vger.kernel.org>
Subject: Re: io_close()
Date: Sat, 8 Feb 2020 00:35:26 +0300
Message-ID: <bf5b575f-1d45-a3db-46ea-925a0eb4fa08@gmail.com> (raw)
In-Reply-To: <6052650b-4deb-4a4c-8efb-a85e4781cce2@kernel.dk>

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On 08/02/2020 00:14, Jens Axboe wrote:
> On 2/7/20 1:52 PM, Pavel Begunkov wrote:
>> Hi,
>>
>> I noticed, that io_close() is broken for some use cases, and was thinking about
>> the best way to fix it. Is fput(req->close.put_file) really need to be done in
>> wq? It seems, fput_many() implementation just calls schedule_delayed_work(), so
>> it's already delayed.
> 
> It's not the fput(), it's the f_op->flush().

What confuses me, is that in case of ->flush, it doesn't return -EAGAIN, but
io_queue_async_work() itself, so nobody will set ->work.files. But that means
io_close_finish() won't do filp_close() as well.

Did I missed somewhere called io_grab_files()?


-- 
Pavel Begunkov


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      parent reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-07 20:52 io_close() Pavel Begunkov
2020-02-07 21:14 ` io_close() Jens Axboe
2020-02-07 21:19   ` io_close() Pavel Begunkov
2020-02-07 21:35   ` Pavel Begunkov [this message]

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