f2fs: call sync_fs when f2fs is idle

The sync_fs in f2fs_balance_fs_bg must avoid interrupting current user requests.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index d5141a06b9a3dadce74204d8a3bf847d791ae56a..8affc56211814aaadf6639afb67cf126d6cebf85 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -383,12 +383,15 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
        else
                build_free_nids(sbi, false);
 
+       if (!is_idle(sbi))
+               return;
+
        /* checkpoint is the only way to shrink partial cached entries */
        if (!available_free_memory(sbi, NAT_ENTRIES) ||
                        !available_free_memory(sbi, INO_ENTRIES) ||
                        excess_prefree_segs(sbi) ||
                        excess_dirty_nats(sbi) ||
-                       (is_idle(sbi) && f2fs_time_over(sbi, CP_TIME))) {
+                       f2fs_time_over(sbi, CP_TIME)) {
                if (test_opt(sbi, DATA_FLUSH)) {
                        struct blk_plug plug;