Re: [PATCHSET 0/2] io_uring support for linked timeouts

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

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On 16/11/2019 00:16, Jens Axboe wrote:
> On 11/15/19 12:34 PM, Jens Axboe wrote:
>> How about something like this? Should work (and be valid) to have any
>> sequence of timeout links, as long as there's something in front of it.
>> Commit message has more details.
> 
> Updated below (missed the sqe free), easiest to check out the repo
> here:
> 
> https://git.kernel.dk/cgit/linux-block/log/?h=for-5.5/io_uring-post
> 
> as that will show the couple of prep patches, too. Let me know what
> you think.
> 

Sure,

BTW, found "io_uring: make io_double_put_req() use normal completion
path" in the tree. And it do exactly the same, what my patch was doing,
the one which "blowed" the link test :)

I'd add there "req->flags | REQ_F_FAIL_LINK" in-between failed
io_req_defer() and calling io_double_put_req(). (in 2 places)
Otherwise, even though a request failed, it will enqueue the rest
of its link with io_queue_async_work().

-- 
Pavel Begunkov


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