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io_uring: only force async punt if poll based retry can't handle it

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We do blocking retry from our poll handler, if the file supports polled
notifications. Only mark the request as needing an async worker if we
can't poll for it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-04-28 13:16:53 -06:00
parent af197f50ac
commit 490e89676a
1 changed files with 4 additions and 2 deletions
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6
fs/io_uring.c
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@ -2604,7 +2604,8 @@ static int io_read(struct io_kiocb *req, bool force_nonblock)
if (ret)
goto out_free;
/* any defer here is final, must blocking retry */
if (!(req->flags & REQ_F_NOWAIT))
if (!(req->flags & REQ_F_NOWAIT) &&
!file_can_poll(req->file))
req->flags |= REQ_F_MUST_PUNT;
return -EAGAIN;
}
@ -2726,7 +2727,8 @@ static int io_write(struct io_kiocb *req, bool force_nonblock)
if (ret)
goto out_free;
/* any defer here is final, must blocking retry */
req->flags |= REQ_F_MUST_PUNT;
if (!file_can_poll(req->file))
req->flags |= REQ_F_MUST_PUNT;
return -EAGAIN;
}
}