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io_uring: break iopolling on signal
author
Pavel Begunkov
<asml.silence@gmail.com>
Wed, 9 Aug 2023 15:20:21 +0000
(16:20 +0100)
committer
Jens Axboe
<axboe@kernel.dk>
Wed, 9 Aug 2023 16:46:46 +0000
(10:46 -0600)
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:
def596e9557c9
("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>
io_uring/io_uring.c
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diff --git
a/io_uring/io_uring.c
b/io_uring/io_uring.c
index
d088890
..
ad4ffd3
100644
(file)
--- a/
io_uring/io_uring.c
+++ b/
io_uring/io_uring.c
@@
-1673,6
+1673,9
@@
static int io_iopoll_check(struct io_ring_ctx *ctx, long min)
break;
nr_events += ret;
ret = 0;
+
+ if (task_sigpending(current))
+ return -EINTR;
} while (nr_events < min && !need_resched());
return ret;