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io_uring: move 'poll_multi_queue' bool in io_ring_ctx 

The cacheline section holding this variable has two gaps, where one is
caused by this bool not packing well with structs. This causes it to
blow into the next cacheline. Move the variable, shrinking io_ring_ctx
by a full cacheline in size.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-01-04 13:49:54 -07:00
parent f26cc95935
commit 59b745bb4e
1 changed files with 2 additions and 1 deletions
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3
include/linux/io_uring_types.h
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@ -292,6 +292,8 @@ struct io_ring_ctx {
struct {
spinlock_t completion_lock;
bool poll_multi_queue;
/*
* ->iopoll_list is protected by the ctx->uring_lock for
* io_uring instances that don't use IORING_SETUP_SQPOLL.
@ -300,7 +302,6 @@ struct io_ring_ctx {
*/
struct io_wq_work_list iopoll_list;
struct io_hash_table cancel_table;
bool poll_multi_queue;
struct llist_head work_llist;