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authorDamien Le Moal <dlemoal@kernel.org>2024-04-08 10:41:25 +0900
committerJens Axboe <axboe@kernel.dk>2024-04-17 08:44:03 -0600
commita98b05b02f0f1f9f4a504564070af208b70214d0 (patch)
tree7c5700b917e6cf150b2eb5346c4b9966b74ba098 /block
parentd9f1439a30d607f7bd06494ea2a63018b7d46380 (diff)
block: Replace zone_wlock debugfs entry with zone_wplugs entry
In preparation to completely remove zone write locking, replace the "zone_wlock" mq-debugfs entry that was listing zones that are write-locked with the zone_wplugs entry which lists the zones that currently have a write plug allocated. The write plug information provided is: the zone number, the zone write plug flags, the zone write plug write pointer offset and the number of BIOs currently waiting for execution in the zone write plug BIO list. 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: Hannes Reinecke <hare@suse.de> Tested-by: Hans Holmberg <hans.holmberg@wdc.com> Tested-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20240408014128.205141-26-dlemoal@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq-debugfs.c2
-rw-r--r--block/blk-mq-debugfs.h4
-rw-r--r--block/blk-zoned.c31
3 files changed, 27 insertions, 10 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 94668e72ab09..ca1f2b9422d5 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -160,7 +160,7 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
{ "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops },
{ "pm_only", 0600, queue_pm_only_show, NULL },
{ "state", 0600, queue_state_show, queue_state_write },
- { "zone_wlock", 0400, queue_zone_wlock_show, NULL },
+ { "zone_wplugs", 0400, queue_zone_wplugs_show, NULL },
{ },
};
diff --git a/block/blk-mq-debugfs.h b/block/blk-mq-debugfs.h
index 3ebe2c29b624..c80e453e3014 100644
--- a/block/blk-mq-debugfs.h
+++ b/block/blk-mq-debugfs.h
@@ -84,9 +84,9 @@ static inline void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
#endif
#if defined(CONFIG_BLK_DEV_ZONED) && defined(CONFIG_BLK_DEBUG_FS)
-int queue_zone_wlock_show(void *data, struct seq_file *m);
+int queue_zone_wplugs_show(void *data, struct seq_file *m);
#else
-static inline int queue_zone_wlock_show(void *data, struct seq_file *m)
+static inline int queue_zone_wplugs_show(void *data, struct seq_file *m)
{
return 0;
}
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index a06d7f7a54c7..44699b431ad0 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -1808,17 +1808,34 @@ EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones);
#ifdef CONFIG_BLK_DEBUG_FS
-int queue_zone_wlock_show(void *data, struct seq_file *m)
+int queue_zone_wplugs_show(void *data, struct seq_file *m)
{
struct request_queue *q = data;
- unsigned int i;
+ struct gendisk *disk = q->disk;
+ struct blk_zone_wplug *zwplug;
+ unsigned int zwp_wp_offset, zwp_flags;
+ unsigned int zwp_zone_no, zwp_ref;
+ unsigned int zwp_bio_list_size, i;
+ unsigned long flags;
- if (!q->disk->seq_zones_wlock)
- return 0;
+ rcu_read_lock();
+ for (i = 0; i < disk_zone_wplugs_hash_size(disk); i++) {
+ hlist_for_each_entry_rcu(zwplug,
+ &disk->zone_wplugs_hash[i], node) {
+ spin_lock_irqsave(&zwplug->lock, flags);
+ zwp_zone_no = zwplug->zone_no;
+ zwp_flags = zwplug->flags;
+ zwp_ref = atomic_read(&zwplug->ref);
+ zwp_wp_offset = zwplug->wp_offset;
+ zwp_bio_list_size = bio_list_size(&zwplug->bio_list);
+ spin_unlock_irqrestore(&zwplug->lock, flags);
- for (i = 0; i < q->disk->nr_zones; i++)
- if (test_bit(i, q->disk->seq_zones_wlock))
- seq_printf(m, "%u\n", i);
+ seq_printf(m, "%u 0x%x %u %u %u\n",
+ zwp_zone_no, zwp_flags, zwp_ref,
+ zwp_wp_offset, zwp_bio_list_size);
+ }
+ }
+ rcu_read_unlock();
return 0;
}