From 44a84da45272b3f4beb90025a64cfbde18f1aef0 Mon Sep 17 00:00:00 2001 From: Dylan Yudaken Date: Thu, 15 Dec 2022 10:41:38 -0800 Subject: [PATCH] io_uring: use call_rcu_hurry if signaling an eventfd io_uring uses call_rcu in the case it needs to signal an eventfd as a result of an eventfd signal, since recursing eventfd signals are not allowed. This should be calling the new call_rcu_hurry API to not delay the signal. Signed-off-by: Dylan Yudaken Cc: Joel Fernandes (Google) Cc: Paul E. McKenney Acked-by: Paul E. McKenney Reviewed-by: Joel Fernandes (Google) Link: https://lore.kernel.org/r/20221215184138.795576-1-dylany@meta.com Signed-off-by: Jens Axboe --- io_uring/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 4601e48a173d..16a323a9ff70 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -538,7 +538,7 @@ static void io_eventfd_signal(struct io_ring_ctx *ctx) } else { atomic_inc(&ev_fd->refs); if (!atomic_fetch_or(BIT(IO_EVENTFD_OP_SIGNAL_BIT), &ev_fd->ops)) - call_rcu(&ev_fd->rcu, io_eventfd_ops); + call_rcu_hurry(&ev_fd->rcu, io_eventfd_ops); else atomic_dec(&ev_fd->refs); } -- 2.39.5