Revert "writeback: plug writeback at a high level"

[karo-tx-linux.git] / fs / fs-writeback.c

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 24489126f8ca1144441ad853ac48ac275d439e5e..d8ea7ed411b22d97ff8136f80246c0a64ff6d0ad 100644 (file)
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1380,6 +1380,10 @@ static long writeback_chunk_size(struct bdi_writeback *wb,
  * Write a portion of b_io inodes which belong to @sb.
  *
  * Return the number of pages and/or inodes written.
+ *
+ * NOTE! This is called with wb->list_lock held, and will
+ * unlock and relock that for each inode it ends up doing
+ * IO for.
  */
 static long writeback_sb_inodes(struct super_block *sb,
                                struct bdi_writeback *wb,
@@ -1398,9 +1402,7 @@ static long writeback_sb_inodes(struct super_block *sb,
        unsigned long start_time = jiffies;
        long write_chunk;
        long wrote = 0;  /* count both pages and inodes */
-       struct blk_plug plug;
 
-       blk_start_plug(&plug);
        while (!list_empty(&wb->b_io)) {
                struct inode *inode = wb_inode(wb->b_io.prev);
 
@@ -1498,7 +1500,6 @@ static long writeback_sb_inodes(struct super_block *sb,
                                break;
                }
        }
-       blk_finish_plug(&plug);
        return wrote;
 }