[PATCH] xfs: preallocation transactions do not need to be synchronous

[Christoph Hellwig]

On Thu, Mar 10, 2011 at 02:36:34AM -0500, Christoph Hellwig wrote:
> I had the same patch in my queue, but it turns out even that isn't
> enough for good performance when used fallocate in the fast path (e.g.
> recent Samba).  I'll send a more comprehensive optimization that
> includes this soon.
> 
> I also refactored the whole area to make the various flags more
> sensible.

Given that 2.6.38 is out now and I won't have my series ready in time
I'm fine with putting your minimal version in for now, I'll port mine
on top.

Reviewed-by: Christoph Hellwig <hch at lst.de>