linux-kernel - [PATCH v6 4/5] io_uring: avoid ring quiesce while registering restrictions and enabling rings

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Message-Id: <20220204145117.1186568-5-usama.arif@bytedance.com>
Date:   Fri,  4 Feb 2022 14:51:16 +0000
From:   Usama Arif <usama.arif@...edance.com>
To:     io-uring@...r.kernel.org, axboe@...nel.dk, asml.silence@...il.com,
        linux-kernel@...r.kernel.org
Cc:     fam.zheng@...edance.com, Usama Arif <usama.arif@...edance.com>
Subject: [PATCH v6 4/5] io_uring: avoid ring quiesce while registering restrictions and enabling rings

IORING_SETUP_R_DISABLED prevents submitting requests and
so there will be no requests until IORING_REGISTER_ENABLE_RINGS
is called. And IORING_REGISTER_RESTRICTIONS works only before
IORING_REGISTER_ENABLE_RINGS is called. Hence ring quiesce is
not needed for these opcodes.

Signed-off-by: Usama Arif <usama.arif@...edance.com>
---
 fs/io_uring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 671c57f9c1fa..a2ce2601d4de 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -11007,6 +11007,8 @@ static bool io_register_op_must_quiesce(int op)
 	case IORING_REGISTER_PROBE:
 	case IORING_REGISTER_PERSONALITY:
 	case IORING_UNREGISTER_PERSONALITY:
+	case IORING_REGISTER_ENABLE_RINGS:
+	case IORING_REGISTER_RESTRICTIONS:
 	case IORING_REGISTER_FILES2:
 	case IORING_REGISTER_FILES_UPDATE2:
 	case IORING_REGISTER_BUFFERS2:
-- 
2.25.1