Message ID | 20130423093107.GF4596@quack.suse.cz |
---|---|
State | Not Applicable, archived |
Headers | show |
diff --git a/fs/buffer.c b/fs/buffer.c index b4dcb34..e026a3e 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -69,6 +69,12 @@ static int sleep_on_buffer(void *word) void __lock_buffer(struct buffer_head *bh) { + /* + * Likely under async writeback? Tell io scheduler we are + * now waiting for the IO... + */ + if (PageWriteback(bh->b_page)) + io_now_sync(bh->b_bdev, bh->b_blocknr); wait_on_bit_lock(&bh->b_state, BH_Lock, sleep_on_buffer, TASK_UNINTERRUPTIBLE); }