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block: add trace messages to zone write plugging

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Add tracepoints to zone write plugging plug and unplug events.

Examples for these events are:

  kworker/u10:4-393  [001] d..1. 282.991660: disk_zone_wplug_add_bio: 8,0 zone 16, BIO 8388608 + 128
  kworker/0:1H-58    [ [000] d..1. 283.083294: blk_zone_wplug_bio: 8,0 zone 15, BIO 7864320 + 128

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20250715115324.53308-6-johannes.thumshirn@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Johannes Thumshirn 2025-07-15 13:53:24 +02:00 • committed by Jens Axboe
parent 4020d22f0d
commit 2e92ac61c9
2 changed files with 49 additions and 0 deletions
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5
block/blk-zoned.c
View file

@ -822,6 +822,8 @@ static inline void disk_zone_wplug_add_bio(struct gendisk *disk,
* at the tail of the list to preserve the sequential write order.
*/
bio_list_add(&zwplug->bio_list, bio);
trace_disk_zone_wplug_add_bio(zwplug->disk->queue, zwplug->zone_no,
bio->bi_iter.bi_sector, bio_sectors(bio));
zwplug->flags |= BLK_ZONE_WPLUG_PLUGGED;
@ -1299,6 +1301,9 @@ again:
goto put_zwplug;
}
trace_blk_zone_wplug_bio(zwplug->disk->queue, zwplug->zone_no,
bio->bi_iter.bi_sector, bio_sectors(bio));
if (!blk_zone_wplug_prepare_bio(zwplug, bio)) {
blk_zone_wplug_bio_io_error(zwplug, bio);
goto again;

44
include/trace/events/block.h
View file

@ -633,6 +633,50 @@ TRACE_EVENT(blkdev_zone_mgmt,
(unsigned long long)__entry->sector,
__entry->nr_sectors)
);
DECLARE_EVENT_CLASS(block_zwplug,
TP_PROTO(struct request_queue *q, unsigned int zno, sector_t sector,
unsigned int nr_sectors),
TP_ARGS(q, zno, sector, nr_sectors),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( unsigned int, zno )
__field( sector_t, sector )
__field( unsigned int, nr_sectors )
),
TP_fast_assign(
__entry->dev = disk_devt(q->disk);
__entry->zno = zno;
__entry->sector = sector;
__entry->nr_sectors = nr_sectors;
),
TP_printk("%d,%d zone %u, BIO %llu + %u",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->zno,
(unsigned long long)__entry->sector,
__entry->nr_sectors)
);
DEFINE_EVENT(block_zwplug, disk_zone_wplug_add_bio,
TP_PROTO(struct request_queue *q, unsigned int zno, sector_t sector,
unsigned int nr_sectors),
TP_ARGS(q, zno, sector, nr_sectors)
);
DEFINE_EVENT(block_zwplug, blk_zone_wplug_bio,
TP_PROTO(struct request_queue *q, unsigned int zno, sector_t sector,
unsigned int nr_sectors),
TP_ARGS(q, zno, sector, nr_sectors)
);
#endif /* _TRACE_BLOCK_H */
/* This part must be outside protection */