Re: [PATCH v2 3/8] io_uring: refactor __io_cq_unlock_post_flush()

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On 4/6/23 14:20, Pavel Begunkov wrote:
Instead of smp_mb() + __io_cqring_wake() in __io_cq_unlock_post_flush()
use equivalent io_cqring_wake(). With that we can clean it up further
and remove __io_cqring_wake().

I didn't notice patches 3 and 7 have the same subj. This one
should've better been called refactor io_cqring_wake().


Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
  io_uring/io_uring.c |  6 ++----
  io_uring/io_uring.h | 11 ++---------
  2 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index fb7215b543cd..d4ac62de2113 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -640,10 +640,8 @@ static inline void __io_cq_unlock_post_flush(struct io_ring_ctx *ctx)
  	 * it will re-check the wakeup conditions once we return we can safely
  	 * skip waking it up.
  	 */
-	if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN)) {
-		smp_mb();
-		__io_cqring_wake(ctx);
-	}
+	if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN))
+		io_cqring_wake(ctx);
  }


--
Pavel Begunkov



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