Re: [PATCH] io_uring/rw: ensure reissue path is correctly handled for IOPOLL

[Jens Axboe <axboe@kernel.dk>]

On 3/6/25 3:12 AM, John Garry wrote:
> On 05/03/2025 21:06, Jens Axboe wrote:
>> The IOPOLL path posts CQEs when the io_kiocb is marked as completed,
>> so it cannot rely on the usual retry that non-IOPOLL requests do for
>> read/write requests.
>>
>> If -EAGAIN is received and the request should be retried, go through
>> the normal completion path and let the normal flush logic catch it and
>> reissue it, like what is done for !IOPOLL reads or writes.
>>
>> Fixes: d803d123948f ("io_uring/rw: handle -EAGAIN retry at IO completion time")
>> Reported-by: John Garry<john.g.garry@oracle.com>
>> Link:https://urldefense.com/v3/__https://lore.kernel.org/io- uring/2b43ccfa-644d-4a09-8f8f-39ad71810f41@oracle.com/__;!! ACWV5N9M2RV99hQ!J4rCZomS7jntxigOWFGkQC3hFMb5EZf3-aZG4hZCB6n_quTKHse9g- WSxf46gMXpEfyzjaAQKTff2J9o0pg$ Signed-off-by: Jens Axboe<axboe@kernel.dk>
> 
> This solves the issue which I was seeing, so:
> 
> Tested-by: John Garry <john.g.garry@oracle.com>

Great, thanks for testing!

-- 
Jens Axboe