> > How about adding
> > if (!buffer_uptodate(bh)) {
> > printk(KERN_ERR "IO error or racy use of wait_on_buffer()");
> > show_task(current);
> > }
> > in the end of wait_on_buffer() for a while?
>
> At the _top_ of wait_on_buffer would be better then at the end.
In that case ll_rw_block() + wait_on_buffer() (absolutely legitimate
combination) will scream at you.
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