f2fs: add tracepoint for f2fs_gc
This patch adds tracepoint for f2fs_gc.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index e60480f..57bea21 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -919,7 +919,7 @@
struct blk_plug plug;
unsigned int segno = start_segno;
unsigned int end_segno = start_segno + sbi->segs_per_sec;
- int sec_freed = 0;
+ int seg_freed = 0;
unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ?
SUM_TYPE_DATA : SUM_TYPE_NODE;
@@ -965,6 +965,10 @@
gc_type);
stat_inc_seg_count(sbi, type, gc_type);
+
+ if (gc_type == FG_GC &&
+ get_valid_blocks(sbi, segno, false) == 0)
+ seg_freed++;
next:
f2fs_put_page(sum_page, 0);
}
@@ -975,21 +979,17 @@
blk_finish_plug(&plug);
- if (gc_type == FG_GC &&
- get_valid_blocks(sbi, start_segno, true) == 0)
- sec_freed = 1;
-
stat_inc_call_count(sbi->stat_info);
- return sec_freed;
+ return seg_freed;
}
int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
bool background, unsigned int segno)
{
int gc_type = sync ? FG_GC : BG_GC;
- int sec_freed = 0;
- int ret;
+ int sec_freed = 0, seg_freed = 0, total_freed = 0;
+ int ret = 0;
struct cp_control cpc;
unsigned int init_segno = segno;
struct gc_inode_list gc_list = {
@@ -997,6 +997,15 @@
.iroot = RADIX_TREE_INIT(GFP_NOFS),
};
+ trace_f2fs_gc_begin(sbi->sb, sync, background,
+ get_pages(sbi, F2FS_DIRTY_NODES),
+ get_pages(sbi, F2FS_DIRTY_DENTS),
+ get_pages(sbi, F2FS_DIRTY_IMETA),
+ free_sections(sbi),
+ free_segments(sbi),
+ reserved_segments(sbi),
+ prefree_segments(sbi));
+
cpc.reason = __get_cp_reason(sbi);
gc_more:
if (unlikely(!(sbi->sb->s_flags & MS_ACTIVE))) {
@@ -1023,17 +1032,20 @@
gc_type = FG_GC;
}
- ret = -EINVAL;
/* f2fs_balance_fs doesn't need to do BG_GC in critical path. */
- if (gc_type == BG_GC && !background)
+ if (gc_type == BG_GC && !background) {
+ ret = -EINVAL;
goto stop;
- if (!__get_victim(sbi, &segno, gc_type))
+ }
+ if (!__get_victim(sbi, &segno, gc_type)) {
+ ret = -ENODATA;
goto stop;
- ret = 0;
+ }
- if (do_garbage_collect(sbi, segno, &gc_list, gc_type) &&
- gc_type == FG_GC)
+ seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type);
+ if (gc_type == FG_GC && seg_freed == sbi->segs_per_sec)
sec_freed++;
+ total_freed += seg_freed;
if (gc_type == FG_GC)
sbi->cur_victim_sec = NULL_SEGNO;
@@ -1050,6 +1062,16 @@
stop:
SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0;
SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno;
+
+ trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed,
+ get_pages(sbi, F2FS_DIRTY_NODES),
+ get_pages(sbi, F2FS_DIRTY_DENTS),
+ get_pages(sbi, F2FS_DIRTY_IMETA),
+ free_sections(sbi),
+ free_segments(sbi),
+ reserved_segments(sbi),
+ prefree_segments(sbi));
+
mutex_unlock(&sbi->gc_mutex);
put_gc_inode(&gc_list);