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| author | Stefano Garzarella <sgarzare@redhat.com> | 2020-02-07 13:18:28 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-02-08 13:06:58 -0700 |
| commit | 63e5d81f72af1bf370bf8a6745b0a8d71a7bb37d (patch) | |
| tree | 03881aa43362cda36af3f669d5da499563a37b0c /fs/io_uring.c | |
| parent | cf3040ca55f2085b0a372a620ee2cb93ae19b686 (diff) | |
| download | linux-63e5d81f72af1bf370bf8a6745b0a8d71a7bb37d.tar.bz2 | |
io_uring: flush overflowed CQ events in the io_uring_poll()
In io_uring_poll() we must flush overflowed CQ events before to
check if there are CQ events available, to avoid missing events.
We call the io_cqring_events() that checks and flushes any overflow
and returns the number of CQ events available.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index d03846822062..2954a8bdf824 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -6283,7 +6283,7 @@ static __poll_t io_uring_poll(struct file *file, poll_table *wait) if (READ_ONCE(ctx->rings->sq.tail) - ctx->cached_sq_head != ctx->rings->sq_ring_entries) mask |= EPOLLOUT | EPOLLWRNORM; - if (READ_ONCE(ctx->rings->cq.head) != ctx->cached_cq_tail) + if (io_cqring_events(ctx, false)) mask |= EPOLLIN | EPOLLRDNORM; return mask; |