From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Tue, 7 Jun 2016 01:49:54 +0000 (-0700)
Subject: f2fs: skip clean segment for gc
X-Git-Tag: v4.14-rc1~2821^2~38
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aa987273290d206b298e9d09db83e32ead661098;p=platform%2Fkernel%2Flinux-rpi.git

f2fs: skip clean segment for gc

If a segment in a section is clean or prefreed, we don't need to get its summary
and do gc.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 67fd285..e1d274cde 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -795,6 +795,10 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
 	}
 
 	for (segno = start_segno; segno < end_segno; segno++) {
+
+		if (get_valid_blocks(sbi, segno, 1) == 0)
+			continue;
+
 		/* find segment summary of victim */
 		sum_page = find_get_page(META_MAPPING(sbi),
 					GET_SUM_BLOCK(sbi, segno));