From f307333e14f6b18045eb4198fe646d9b6028f3ed Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 17 May 2010 03:00:00 -0400
Subject: [PATCH] ext4: Add new tracepoints to track mballoc's buddy bitmap
loads
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/mballoc.c | 2 ++
include/trace/events/ext4.h | 33 +++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 0bdc0188e5e2..a93f554b6803 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -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);
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 2aa6aa3e8f61..99fbf1d0a6b9 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -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 */
--
2.30.9