linux-kernel - [PATCH 1/3] f2fs: count dirty inodes to flush node pages during checkpoint

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Date:   Mon, 17 Oct 2016 14:56:43 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 1/3] f2fs: count dirty inodes to flush node pages during checkpoint

If there are a lot of dirty inodes, we need to flush all of them when doing
checkpoint. So, we need to count this for enough free space.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/segment.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index fecb856..a6efb5c 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -471,11 +471,12 @@ static inline bool need_SSR(struct f2fs_sb_info *sbi)
 {
 	int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
 	int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
+	int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
 
 	if (test_opt(sbi, LFS))
 		return false;
 
-	return free_sections(sbi) <= (node_secs + 2 * dent_secs +
+	return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
 						reserved_sections(sbi) + 1);
 }
 
@@ -484,6 +485,7 @@ static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi,
 {
 	int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
 	int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
+	int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
 
 	node_secs += get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
 
@@ -491,7 +493,8 @@ static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi,
 		return false;
 
 	return (free_sections(sbi) + freed) <=
-		(node_secs + 2 * dent_secs + reserved_sections(sbi) + needed);
+		(node_secs + 2 * dent_secs + imeta_secs +
+		reserved_sections(sbi) + needed);
 }
 
 static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi)
-- 
2.8.3