Re: [00/41] Large Blocksize Support V7 (adds memmap support)

[Nick Piggin]

On Thursday 13 September 2007 11:49, David Chinner wrote:
> On Wed, Sep 12, 2007 at 01:27:33AM +1000, Nick Piggin wrote:

> > I just gave 4 things which combined might easily reduce xfs vmap overhead
> > by several orders of magnitude, all without changing much code at all.
>
> Patches would be greatly appreciately. You obviously understand this
> vm code much better than I do, so if it's easy to fix by adding some
> generic vmap cache thingy, please do.

Well, it may not be easy to _fix_, but it's easy to try a few improvements ;)

How do I make an image and run a workload that will coerce XFS into
doing a significant number of vmaps?
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