If userspace issue a fstrim with a range not involve prefree segments, it will reuse these segments without discard. This patch fix it.
Signed-off-by: Yunlei He <[email protected]> --- fs/f2fs/segment.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 0738f48..a40a34b 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -916,7 +916,11 @@ void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc) dirty_i->nr_dirty[PRE] -= end - start; - if (force || !test_opt(sbi, DISCARD)) + if (!test_opt(sbi, DISCARD)) + continue; + + if (force && start * sbi->blocks_per_seg >= cpc->trim_start && + end * sbi->blocks_per_seg <= cpc->trim_end) continue; if (!test_opt(sbi, LFS) || sbi->segs_per_sec == 1) { -- 2.10.1 ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today.http://sdm.link/intel _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
