io_uring/rw: handle -EAGAIN retry at IO completion time

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Rather than try and have io_read/io_write turn REQ_F_REISSUE into
-EAGAIN, catch the REQ_F_REISSUE when the request is otherwise
considered as done. This is saner as we know this isn't happening
during an actual submission, and it removes the need to randomly
check REQ_F_REISSUE after read/write submission.

If REQ_F_REISSUE is set, __io_submit_flush_completions() will skip over
this request in terms of posting a CQE, and the regular request
cleaning will ensure that it gets reissued via io-wq.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2025-01-07 10:59:35 -07:00

parent 9ac273ae3d

commit d803d12394

2 changed files with 38 additions and 57 deletions

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15

io_uring/io_uring.c

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80

io_uring/rw.c

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