From 95dd89730119b97d82f9edc806757cef737703e5 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 17 Sep 2014 17:52:58 -0700 Subject: [PATCH] f2fs: use more free segments until SSR is activated Previously, f2fs activates SSR if the # of free segments reaches to the # of overprovisioned segments. In this case, SSR starts to use dirty segments only, so that the overprovisoned space cannot be selected for new data. This means that we have no chance to utilizae the overprovisioned space at all. This patch fixes that by allowing LFS allocations until the # of free segments reaches to the last threshold, reserved space. Signed-off-by: Jaegeuk Kim --- fs/f2fs/segment.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index d317b61f83a5..4588545b3030 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -437,8 +437,10 @@ static inline int reserved_sections(struct f2fs_sb_info *sbi) static inline bool need_SSR(struct f2fs_sb_info *sbi) { - return (prefree_segments(sbi) / sbi->segs_per_sec) - + free_sections(sbi) < overprovision_sections(sbi); + int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); + int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); + return free_sections(sbi) <= (node_secs + 2 * dent_secs + + reserved_sections(sbi) + 1); } static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, int freed) -- 2.39.2