f2fs: give time to flush dirty pages for checkpoint

If all the threads are waiting for checkpoint, we have no chance to flush
required dirty pages.

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

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 9db92990f193355fc330c2b24295a064eecb4aad..800be94f8cb3a629c84663275658871a1b6ca853 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -980,6 +980,7 @@ retry_flush_dents:
                err = sync_dirty_inodes(sbi, DIR_INODE);
                if (err)
                        goto out;
+               cond_resched();
                goto retry_flush_dents;
        }
 
@@ -995,6 +996,7 @@ retry_flush_dents:
                err = f2fs_sync_inode_meta(sbi);
                if (err)
                        goto out;
+               cond_resched();
                goto retry_flush_dents;
        }
 
@@ -1009,6 +1011,7 @@ retry_flush_nodes:
                        f2fs_unlock_all(sbi);
                        goto out;
                }
+               cond_resched();
                goto retry_flush_nodes;
        }