6.8-stable review patch. If anyone has any objections, please let me know.
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From: Pavel Begunkov asml.silence@gmail.com
[ Upstream commit ef42b85a5609cd822ca0a68dd2bef2b12b5d1ca3 ]
SEND[MSG]_ZC produces multiple CQEs via notifications, LAZY_WAKE doesn't handle it and so disable LAZY_WAKE for sendzc polling. It should be fine, sends are not likely to be polled in the first place.
Fixes: 6ce4a93dbb5b ("io_uring/poll: use IOU_F_TWQ_LAZY_WAKE for wakeups") Signed-off-by: Pavel Begunkov asml.silence@gmail.com Link: https://lore.kernel.org/r/5b360fb352d91e3aec751d75c87dfb4753a084ee.171448841... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- io_uring/net.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/io_uring/net.c b/io_uring/net.c index d193b87d0a03b..099ab92cca0b7 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -1022,6 +1022,7 @@ int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) struct io_kiocb *notif;
zc->done_io = 0; + req->flags |= REQ_F_POLL_NO_LAZY;
if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3))) return -EINVAL;