From: Pavel Begunkov Date: Tue, 30 Apr 2024 15:42:30 +0000 (+0100) Subject: io_uring/net: fix sendzc lazy wake polling X-Git-Tag: v6.8.12~341 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ced82fb9030411d57cf242a3c46815b0920042b;p=thirdparty%2Fkernel%2Fstable.git io_uring/net: fix sendzc lazy wake polling [ 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 Link: https://lore.kernel.org/r/5b360fb352d91e3aec751d75c87dfb4753a084ee.1714488419.git.asml.silence@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- 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;