Commit 205649d8 authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm: reorder members in mapped_device struct 



Improves alignment and groups related members relative to cachelines.

Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 0ab30b40

drivers/md/dm-core.h

+19 −19
Original line number Diff line number Diff line
@@ -64,13 +64,21 @@ struct mapped_device { 
	struct gendisk *disk;

	struct dax_device *dax_dev;



	wait_queue_head_t wait;

	unsigned long __percpu *pending_io;



	/* forced geometry settings */

	struct hd_geometry geometry;



	/*

	 * Processing queue (flush)

	 */

	struct workqueue_struct *wq;



	/*

	 * A list of ios that arrived while we were suspended.

	 */

	struct work_struct work;

	wait_queue_head_t wait;

	spinlock_t deferred_lock;

	struct bio_list deferred;
@@ -85,36 +93,28 @@ struct mapped_device { 
	struct list_head uevent_list;

	spinlock_t uevent_lock; /* Protect access to uevent_list */



	/* for blk-mq request-based DM support */

	bool init_tio_pdu:1;

	struct blk_mq_tag_set *tag_set;



	struct dm_stats stats;



	/* the number of internal suspends */

	unsigned internal_suspend_count;



	int swap_bios;

	struct semaphore swap_bios_semaphore;

	struct mutex swap_bios_lock;



	/*

	 * io objects are allocated from here.

	 */

	struct bio_set io_bs;

	struct bio_set bs;



	/*

	 * Processing queue (flush)

	 */

	struct workqueue_struct *wq;



	/* forced geometry settings */

	struct hd_geometry geometry;



	/* kobject and completion */

	struct dm_kobject_holder kobj_holder;



	int swap_bios;

	struct semaphore swap_bios_semaphore;

	struct mutex swap_bios_lock;



	struct dm_stats stats;



	/* for blk-mq request-based DM support */

	struct blk_mq_tag_set *tag_set;

	bool init_tio_pdu:1;



	struct srcu_struct io_barrier;



#ifdef CONFIG_BLK_DEV_ZONED