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io_uring: break iopolling on signal

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[ upstream commit dc314886cb ]

Don't keep spinning iopoll with a signal set. It'll eventually return
back, e.g. by virtue of need_resched(), but it's not a nice user
experience.

Cc: stable@vger.kernel.org
Fixes: def596e955 ("io_uring: support for IO polling")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/eeba551e82cad12af30c3220125eb6cb244cc94c.1691594339.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pavel Begunkov 2023-09-12 15:02:01 +01:00 committed by Greg Kroah-Hartman
parent 0def123f12
commit c29848249f
1 changed files with 5 additions and 0 deletions
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5
io_uring/io_uring.c
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@ -2668,6 +2668,11 @@ static int io_iopoll_check(struct io_ring_ctx *ctx, long min)
break;
}
ret = io_do_iopoll(ctx, &nr_events, min);
if (task_sigpending(current)) {
ret = -EINTR;
goto out;
}
} while (!ret && nr_events < min && !need_resched());
out:
mutex_unlock(&ctx->uring_lock);