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Commit f307333e authored by Theodore Ts'o's avatar Theodore Ts'o
Browse files

ext4: Add new tracepoints to track mballoc's buddy bitmap loads 



Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 5a58ec87

fs/ext4/mballoc.c

+2 −0
Original line number Diff line number Diff line
@@ -890,6 +890,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore) 
			BUG_ON(incore == NULL);

			mb_debug(1, "put buddy for group %u in page %lu/%x\n",

				group, page->index, i * blocksize);

			trace_ext4_mb_buddy_bitmap_load(sb, group);

			grinfo = ext4_get_group_info(sb, group);

			grinfo->bb_fragments = 0;

			memset(grinfo->bb_counters, 0,
@@ -907,6 +908,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore) 
			BUG_ON(incore != NULL);

			mb_debug(1, "put bitmap for group %u in page %lu/%x\n",

				group, page->index, i * blocksize);

			trace_ext4_mb_bitmap_load(sb, group);



			/* see comments in ext4_mb_put_pa() */

			ext4_lock_group(sb, group);

include/trace/events/ext4.h

+33 −0
Original line number Diff line number Diff line
@@ -974,6 +974,39 @@ TRACE_EVENT(ext4_da_release_space, 
		  __entry->reserved_meta_blocks, __entry->allocated_meta_blocks)

);



DECLARE_EVENT_CLASS(ext4__bitmap_load,

	TP_PROTO(struct super_block *sb, unsigned long group),



	TP_ARGS(sb, group),



	TP_STRUCT__entry(

		__field(	dev_t,	dev			)

		__field(	__u32,	group			)



	),



	TP_fast_assign(

		__entry->dev	= sb->s_dev;

		__entry->group	= group;

	),



	TP_printk("dev %s group %u",

		  jbd2_dev_to_name(__entry->dev), __entry->group)

);



DEFINE_EVENT(ext4__bitmap_load, ext4_mb_bitmap_load,



	TP_PROTO(struct super_block *sb, unsigned long group),



	TP_ARGS(sb, group)

);



DEFINE_EVENT(ext4__bitmap_load, ext4_mb_buddy_bitmap_load,



	TP_PROTO(struct super_block *sb, unsigned long group),



	TP_ARGS(sb, group)

);



#endif /* _TRACE_EXT4_H */