6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chao Yu chao@kernel.org
commit 37345eae9deaa2e4f372eeb98f6594cd0ee0916e upstream.
w/ LFS mode, in get_left_section_blocks(), we should not account the blocks which were used before and now are invalided, otherwise those blocks will be counted as freed one in has_curseg_enough_space(), result in missing to trigger GC in time.
Cc: stable@kernel.org Fixes: 249ad438e1d9 ("f2fs: add a method for calculating the remaining blocks in the current segment in LFS mode.") Fixes: bf34c93d2645 ("f2fs: check curseg space before foreground GC") Signed-off-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/f2fs/segment.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
--- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -607,10 +607,12 @@ static inline int reserved_sections(stru static inline unsigned int get_left_section_blocks(struct f2fs_sb_info *sbi, enum log_type type, unsigned int segno) { - if (f2fs_lfs_mode(sbi) && __is_large_section(sbi)) - return CAP_BLKS_PER_SEC(sbi) - SEGS_TO_BLKS(sbi, - (segno - GET_START_SEG_FROM_SEC(sbi, segno))) - + if (f2fs_lfs_mode(sbi)) { + unsigned int used_blocks = __is_large_section(sbi) ? SEGS_TO_BLKS(sbi, + (segno - GET_START_SEG_FROM_SEC(sbi, segno))) : 0; + return CAP_BLKS_PER_SEC(sbi) - used_blocks - CURSEG_I(sbi, type)->next_blkoff; + } return CAP_BLKS_PER_SEC(sbi) - get_ckpt_valid_blocks(sbi, segno, true); }