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io_uring: move submit side state closer in the ring

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We recently added the submit side req cache, but it was placed at the
end of the struct. Move it near the other submission state for better
memory placement, and reshuffle a few other members at the same time.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-02-11 10:48:03 -07:00
parent e68a3ff8c3
commit 3c1a2ead91
1 changed files with 10 additions and 7 deletions
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17
fs/io_uring.c
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@ -346,6 +346,13 @@ struct io_ring_ctx {
struct io_uring_sqe *sq_sqes;
} ____cacheline_aligned_in_smp;
struct {
struct mutex uring_lock;
wait_queue_head_t wait;
} ____cacheline_aligned_in_smp;
struct io_submit_state submit_state;
struct io_rings *rings;
/* IO offload */
@ -413,11 +420,6 @@ struct io_ring_ctx {
struct eventfd_ctx *cq_ev_fd;
} ____cacheline_aligned_in_smp;
struct {
struct mutex uring_lock;
wait_queue_head_t wait;
} ____cacheline_aligned_in_smp;
struct {
spinlock_t completion_lock;
@ -441,9 +443,10 @@ struct io_ring_ctx {
struct list_head rsrc_ref_list;
spinlock_t rsrc_ref_lock;
struct work_struct exit_work;
struct io_restriction restrictions;
struct io_submit_state submit_state;
/* Keep this last, we don't need it for the fast path */
struct work_struct exit_work;
};
/*