Commit e78bd0d2 authored by Guoju Fang's avatar Guoju Fang Committed by Jens Axboe
Browse files

bcache: print number of keys in trace_bcache_journal_write 



Sometimes flush journal may be very frequent, so it's useful to dump
number of keys every time write journal.

Signed-off-by: default avatarGuoju Fang <fangguoju@gmail.com>
Signed-off-by: default avatarColy Li <colyli@suse.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent cc38ca7e

drivers/md/bcache/journal.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

include/trace/events/bcache.h

+24 −3
Original line number Diff line number Diff line
@@ -221,9 +221,30 @@ DEFINE_EVENT(cache_set, bcache_journal_entry_full, 
	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)

);



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