From: Changman Lee <cm224.lee@samsung.com>
Date: Fri, 25 Oct 2013 08:31:57 +0000 (+0900)
Subject: f2fs: remove unnecessary segment bitmap updates
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4625d6aac2d00a18f7bcc15bffe41e9de3a25332;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

f2fs: remove unnecessary segment bitmap updates

Only one dirty type is set in __locate_dirty_segment and we can know
dirty type of segment. So we don't need to check other dirty types.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
---

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 487af619aeda..8f92c18a01fb 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -58,20 +58,10 @@ static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
 
 	if (dirty_type == DIRTY) {
 		struct seg_entry *sentry = get_seg_entry(sbi, segno);
-		enum dirty_type t = DIRTY_HOT_DATA;
+		enum dirty_type t = sentry->type;
 
-		dirty_type = sentry->type;
-
-		if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
-			dirty_i->nr_dirty[dirty_type]++;
-
-		/* Only one bitmap should be set */
-		for (; t <= DIRTY_COLD_NODE; t++) {
-			if (t == dirty_type)
-				continue;
-			if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
-				dirty_i->nr_dirty[t]--;
-		}
+		if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
+			dirty_i->nr_dirty[t]++;
 	}
 }
 
@@ -84,16 +74,11 @@ static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
 		dirty_i->nr_dirty[dirty_type]--;
 
 	if (dirty_type == DIRTY) {
-		enum dirty_type t = DIRTY_HOT_DATA;
-
-		/* clear its dirty bitmap */
-		for (; t <= DIRTY_COLD_NODE; t++) {
-			if (test_and_clear_bit(segno,
-						dirty_i->dirty_segmap[t])) {
-				dirty_i->nr_dirty[t]--;
-				break;
-			}
-		}
+		struct seg_entry *sentry = get_seg_entry(sbi, segno);
+		enum dirty_type t = sentry->type;
+
+		if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
+			dirty_i->nr_dirty[t]--;
 
 		if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0)
 			clear_bit(GET_SECNO(sbi, segno),