corruption with mtdblock

[David Woodhouse]

On Tue, 7 Nov 2000, Nicolas Pitre wrote:

> > Ah. If something is mucking with the request at the head of the queue while 
> >  (q->head_active && !q->plugged) then I think that has to be a kernel bug.
> 
> OK!  Forget all this now.  It wasn't a kernel bug, of course.
> 
> The lesson is:  never use req->nr_sectors in a request function unless
> you're playing special tricks with different segments and you know what
> you're doing.  In the common case req->current_nr_sectors should be used.
> 
> It works beautifully now.

I think we still need to disable plugging to protect the head of the 
list. It's a small race but it's non-zero.

-- 
dwmw2




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