From: Hao Xu <[email protected]>
To: Jens Axboe <[email protected]>
Cc: [email protected], Pavel Begunkov <[email protected]>,
Joseph Qi <[email protected]>
Subject: [PATCH 4/5] io_uring: fix lacking of EPOLLONESHOT
Date: Sat, 18 Sep 2021 03:38:19 +0800 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
We should set EPOLLONESHOT if cqring_fill_event() returns false since
io_poll_add() decides to put req or not by it.
Fixes: 5082620fb2ca ("io_uring: terminate multishot poll for CQ ring overflow")
Signed-off-by: Hao Xu <[email protected]>
---
fs/io_uring.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 02425022c3b0..b1d6c3a1d3cd 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5340,8 +5340,10 @@ static bool __io_poll_complete(struct io_kiocb *req, __poll_t mask)
}
if (req->poll.events & EPOLLONESHOT)
flags = 0;
- if (!io_cqring_fill_event(ctx, req->user_data, error, flags))
+ if (!io_cqring_fill_event(ctx, req->user_data, error, flags)) {
+ req->poll.events |= EPOLLONESHOT;
flags = 0;
+ }
if (flags & IORING_CQE_F_MORE)
ctx->cq_extra++;
--
2.24.4
next prev parent reply other threads:[~2021-09-17 19:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-17 19:38 [RFC 0/5] leverage completion cache for poll requests Hao Xu
2021-09-17 19:38 ` [PATCH 1/5] io_uring: return boolean value for io_alloc_async_data Hao Xu
2021-09-17 19:38 ` [PATCH 2/5] io_uring: code clean for io_poll_complete() Hao Xu
2021-09-17 19:38 ` [PATCH 3/5] io_uring: fix race between poll completion and cancel_hash insertion Hao Xu
2021-09-17 19:38 ` Hao Xu [this message]
2021-09-17 19:38 ` [PATCH 5/5] io_uring: leverage completion cache for poll requests Hao Xu
2021-09-17 19:51 ` Hao Xu
2021-09-17 20:39 ` Pavel Begunkov
2021-09-18 6:11 ` Hao Xu
2021-09-19 12:04 ` Pavel Begunkov
2021-09-19 15:52 ` Hao Xu
2021-09-19 16:10 ` Hao Xu
2021-09-17 20:28 ` [RFC 0/5] " Pavel Begunkov
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