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io_uring: shuffle rarely used ctx fields 

There is a bunch of scattered around ctx fields that are almost never
used, e.g. only on ring exit, plunge them to the end, better locality,
better aesthetically.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/782ff94b00355923eae757d58b1a47821b5b46d4.1621201931.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-05-16 22:58:06 +01:00 committed by Jens Axboe
parent 93d2bcd2cb
commit b986af7e2d
1 changed files with 17 additions and 19 deletions
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32
fs/io_uring.c
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@ -368,9 +368,6 @@ struct io_ring_ctx {
unsigned cached_cq_overflow;
unsigned long sq_check_overflow;
/* hashed buffered write serialization */
struct io_wq_hash *hash_map;
struct list_head defer_list;
struct list_head timeout_list;
struct list_head cq_overflow_list;
@ -387,9 +384,6 @@ struct io_ring_ctx {
struct io_rings *rings;
/* Only used for accounting purposes */
struct mm_struct *mm_account;
const struct cred *sq_creds; /* cred used for __io_sq_thread() */
struct io_sq_data *sq_data; /* if using sq thread polling */
@ -410,14 +404,6 @@ struct io_ring_ctx {
unsigned nr_user_bufs;
struct io_mapped_ubuf **user_bufs;
struct user_struct *user;
struct completion ref_comp;
#if defined(CONFIG_UNIX)
struct socket *ring_sock;
#endif
struct xarray io_buffers;
struct xarray personalities;
@ -461,12 +447,24 @@ struct io_ring_ctx {
struct io_restriction restrictions;
/* exit task_work */
struct callback_head *exit_task_work;
/* Keep this last, we don't need it for the fast path */
struct {
#if defined(CONFIG_UNIX)
struct socket *ring_sock;
#endif
/* hashed buffered write serialization */
struct io_wq_hash *hash_map;
/* Only used for accounting purposes */
struct user_struct *user;
struct mm_struct *mm_account;
/* ctx exit and cancelation */
struct callback_head *exit_task_work;
struct work_struct exit_work;
struct list_head tctx_list;
struct completion ref_comp;
};
};
struct io_uring_task {