fs/fs-writeback.c: restore lost comment
[linux-2.6.git] / fs / fs-writeback.c
index 97d2951..b5aae4b 100644 (file)
@@ -721,6 +721,10 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb)
                return 0;
 
        wb->last_old_flush = jiffies;
+       /*
+        * Add in the number of potentially dirty inodes, because each inode
+        * write can dirty pagecache in the underlying blockdev.
+        */
        nr_pages = global_page_state(NR_FILE_DIRTY) +
                        global_page_state(NR_UNSTABLE_NFS) +
                        (inodes_stat.nr_inodes - inodes_stat.nr_unused);