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Subject[PATCH 5/8] f2fs: add tracepoints for GC threads
Date
From: Namjae Jeon <namjae.jeon@samsung.com>

Add tracepoints for tracing the garbage collector
threads in f2fs.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
---
fs/f2fs/gc.c | 2 ++
include/trace/events/f2fs.h | 20 ++++++++++++++++++++
2 files changed, 22 insertions(+)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 94b8a0c..93a0c4c 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -23,6 +23,7 @@
#include "node.h"
#include "segment.h"
#include "gc.h"
+#include <trace/events/f2fs.h>

static struct kmem_cache *winode_slab;

@@ -237,6 +238,7 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
unsigned int segno;
int nsearched = 0;

+ trace_f2fs_get_victim(sbi->sb, gc_type);
p.alloc_mode = alloc_mode;
select_policy(sbi, gc_type, type, &p);

diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index ae25a1f..9abac346d 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -344,6 +344,26 @@ TRACE_EVENT(f2fs_get_data_block_exit,
(unsigned long) __entry->ino, __entry->ret)
);

+TRACE_EVENT(f2fs_get_victim,
+ TP_PROTO(struct super_block *sb, int gc_type),
+
+ TP_ARGS(sb, gc_type),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(int, type)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = sb->s_dev;
+ __entry->type = gc_type;
+ ),
+
+ TP_printk("dev %d,%d GC_type %d ",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->type)
+);
+
#endif /* _TRACE_F2FS_H */

/* This part must be outside protection */
--
1.7.9.5


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