Re: io_close()

[Pavel Begunkov <asml.silence@gmail.com>]

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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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