f2fs: try to keep CP_TRIMMED_FLAG after successful umount

If every discard were issued successfully, we can avoid further discard.

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 342b720fb4db2a4cc07476f22b48d6ea0dcfea4b..fdd8cd21522f4d51f9f9053bfdc05a81bfd72fe7 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1063,6 +1063,8 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
        } else if (discard_type == DPOLICY_UMOUNT) {
                dpolicy->max_requests = UINT_MAX;
                dpolicy->io_aware = false;
+               /* we need to issue all to keep CP_TRIMMED_FLAG */
+               dpolicy->granularity = 1;
        }
 }