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block: reorganize struct blk_zone_wplug

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Reorganize the fields of struct blk_zone_wplug to remove a hole after
the wp_offset field and avoid having the bio_work structure split
between 2 cache lines.

No functional changes.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal
2025-11-05 06:22:39 +09:00
committed by Jens Axboe
parent fdb9aed869
commit ca1a897fb2
1 changed files with 10 additions and 10 deletions
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20
block/blk-zoned.c
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@@ -39,6 +39,11 @@ static const char *const zone_cond_name[] = {
/*
* Per-zone write plug.
* @node: hlist_node structure for managing the plug using a hash table.
* @bio_list: The list of BIOs that are currently plugged.
* @bio_work: Work struct to handle issuing of plugged BIOs
* @rcu_head: RCU head to free zone write plugs with an RCU grace period.
* @disk: The gendisk the plug belongs to.
* @lock: Spinlock to atomically manipulate the plug.
* @ref: Zone write plug reference counter. A zone write plug reference is
* always at least 1 when the plug is hashed in the disk plug hash table.
* The reference is incremented whenever a new BIO needing plugging is
@@ -48,27 +53,22 @@ static const char *const zone_cond_name[] = {
* reference is dropped whenever the zone of the zone write plug is reset,
* finished and when the zone becomes full (last write BIO to the zone
* completes).
* @lock: Spinlock to atomically manipulate the plug.
* @flags: Flags indicating the plug state.
* @zone_no: The number of the zone the plug is managing.
* @wp_offset: The zone write pointer location relative to the start of the zone
* as a number of 512B sectors.
* @bio_list: The list of BIOs that are currently plugged.
* @bio_work: Work struct to handle issuing of plugged BIOs
* @rcu_head: RCU head to free zone write plugs with an RCU grace period.
* @disk: The gendisk the plug belongs to.
*/
struct blk_zone_wplug {
struct hlist_node node;
refcount_t ref;
spinlock_t lock;
unsigned int flags;
unsigned int zone_no;
unsigned int wp_offset;
struct bio_list bio_list;
struct work_struct bio_work;
struct rcu_head rcu_head;
struct gendisk *disk;
spinlock_t lock;
refcount_t ref;
unsigned int flags;
unsigned int zone_no;
unsigned int wp_offset;
};
static inline unsigned int disk_zone_wplugs_hash_size(struct gendisk *disk)