f2fs: avoid mismatching block range for discard

This patch skip discard block range smaller than trim_minlen,
and can not be merged by neighbour

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 6d16ecf9d29e9191d11ac7a1173c3a8dc30e4d30..9e13db05e3f09e2472ebf7461806d536a16eec4a 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -672,6 +672,10 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
                        break;
 
                end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
+               if (force && start && end != max_blocks
+                                       && (end - start) < cpc->trim_minlen)
+                       continue;
+
                __add_discard_entry(sbi, cpc, se, start, end);
        }
 }