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| author |   Pavel Begunkov <asml.silence@gmail.com> | 2021-06-14 23:37:29 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-06-15 15:38:40 -0600 |
| commit | 0499e582aaff4e4072a760d1f31434acb50c7813 (patch) | |
| tree | a1e8d43d2b48912a30dc3585902ab94212d6fd0e /fs/io_uring.c | |
| parent | io_uring: wait heads renaming (diff) | |
| download | linux-dev-0499e582aaff4e4072a760d1f31434acb50c7813.tar.xz linux-dev-0499e582aaff4e4072a760d1f31434acb50c7813.zip | |
io_uring: move uring_lock location
->uring_lock is prevalently used for submission, even though it protects
many other things like iopoll, registeration, selected bufs, and more.
And it's placed together with ->cq_wait poked on completion and CQ
waiting sides. Move them apart, ->uring_lock goes to the submission
data, and cq_wait to completion related chunk. The last one requires
some reshuffling so everything needed by io_cqring_ev_posted*() is in
one cacheline.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/dea5e845caee4c98aa0922b46d713154d81f7bd8.1623709150.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index e19c9f7db2cf..74c8334d67a4 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -356,6 +356,8 @@ struct io_ring_ctx { /* submission data */ struct { + struct mutex uring_lock; + /* * Ring buffer of indices into array of io_uring_sqe, which is * mmapped by the application using the IORING_OFF_SQES offset. @@ -392,11 +394,6 @@ struct io_ring_ctx { unsigned sq_thread_idle; } ____cacheline_aligned_in_smp; - struct { - struct mutex uring_lock; - wait_queue_head_t cq_wait; - } ____cacheline_aligned_in_smp; - /* IRQ completion list, under ->completion_lock */ struct list_head locked_free_list; unsigned int locked_free_nr; @@ -412,12 +409,13 @@ struct io_ring_ctx { struct { unsigned cached_cq_tail; unsigned cq_entries; - atomic_t cq_timeouts; - unsigned cq_last_tm_flush; - unsigned cq_extra; + struct eventfd_ctx *cq_ev_fd; struct wait_queue_head poll_wait; + struct wait_queue_head cq_wait; + unsigned cq_extra; + atomic_t cq_timeouts; struct fasync_struct *cq_fasync; - struct eventfd_ctx *cq_ev_fd; + unsigned cq_last_tm_flush; } ____cacheline_aligned_in_smp; struct { |