lockdep warning with LTP dio test (v2.6.24-rc6-125-g5356f66)

[Chris Mason]

On Friday 25 January 2008, Jan Kara wrote:

> > If ext3's DIO code only touches transactions in get_block, then it can
> > violate data=ordered rules.  Basically the transaction that allocates
> > the blocks might commit before the DIO code gets around to writing them.
> >
> > A crash in the wrong place will expose stale data on disk.
>
>   Hmm, I've looked at it and I don't think so - look at the rationale in
> the patch below... That patch should fix the lock-inversion problem (at
> least I see no lockdep warnings on my test machine).
>

Ah ok, when I was looking at this I was allowing holes to get filled without 
falling back to buffered.  But, with the orphan inode entry protecting things 
I see how you're safe with this patch.

-chris