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io_uring: keep SQ pointers in a single cacheline
sq_array and sq_sqes are always used together, however they are in different cachelines, where the borderline is right before cq_overflow_list is rather rarely touched. Move the fields together so it loads only one cacheline. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/3ef2411a94874da06492506a8897eff679244f49.1623709150.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -364,6 +364,7 @@ struct io_ring_ctx {
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* array.
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*/
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u32 *sq_array;
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struct io_uring_sqe *sq_sqes;
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unsigned cached_sq_head;
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unsigned sq_entries;
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unsigned sq_thread_idle;
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@ -373,8 +374,6 @@ struct io_ring_ctx {
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struct list_head defer_list;
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struct list_head timeout_list;
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struct list_head cq_overflow_list;
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struct io_uring_sqe *sq_sqes;
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} ____cacheline_aligned_in_smp;
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struct {
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