Sometimes flush journal may be very frequent, so it's useful to dump
number of keys every time write journal.
Signed-off-by: Guoju Fang <fangguoju@xxxxxxxxx>
---
drivers/md/bcache/journal.c | 2 +-
include/trace/events/bcache.h | 27 ++++++++++++++++++++++++---
2 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 522c742..b2fd412 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -663,7 +663,7 @@ static void journal_write_unlocked(struct closure *cl)
REQ_SYNC|REQ_META|REQ_PREFLUSH|REQ_FUA);
bch_bio_map(bio, w->data);
- trace_bcache_journal_write(bio);
+ trace_bcache_journal_write(bio, w->data->keys);
bio_list_add(&list, bio);
SET_PTR_OFFSET(k, i, PTR_OFFSET(k, i) + sectors);
diff --git a/include/trace/events/bcache.h b/include/trace/events/bcache.h
index 2cbd6e4..e4526f8 100644
--- a/include/trace/events/bcache.h
+++ b/include/trace/events/bcache.h
@@ -221,9 +221,30 @@
TP_ARGS(c)
);
-DEFINE_EVENT(bcache_bio, bcache_journal_write,
- TP_PROTO(struct bio *bio),
- TP_ARGS(bio)
+TRACE_EVENT(bcache_journal_write,
+ TP_PROTO(struct bio *bio, u32 keys),
+ TP_ARGS(bio, keys),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev )
+ __field(sector_t, sector )
+ __field(unsigned int, nr_sector )
+ __array(char, rwbs, 6 )
+ __field(u32, nr_keys )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = bio_dev(bio);
+ __entry->sector = bio->bi_iter.bi_sector;
+ __entry->nr_sector = bio->bi_iter.bi_size >> 9;
+ __entry->nr_keys = keys;
+ blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
+ ),
+
+ TP_printk("%d,%d %s %llu + %u keys %u",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
+ (unsigned long long)__entry->sector, __entry->nr_sector,
+ __entry->nr_keys)
);
/* Btree */
--
1.8.3.1
