Re: Btrfs for mainline

Chris Mason
2009-01-05T13:21:43Z

On Mon, 2009-01-05 at 21:32 +1100, Nick Piggin wrote:
> On Saturday 03 January 2009 06:38:07 Chris Mason wrote:

> > The extent_map and extent_buffer code was also intended for generic use.
> > It needs some love and care (making it work for blocksize != pagesize)
> > before I'd suggest moving it out of fs/btrfs.
>
> I'm yet to be convinced it is a good idea to use extents for this. Been a
> long time since we visited the issue, but when you converted ext2 to use
> the extent mapping stuff, it actually went slower, and complexity went up
> a lot (IIRC possibly required allocations in the writeback path).
>
>
> So I think it is a fine idea to live in btrfs until it is more proven and
> found useful elsewhere.

It has gotten faster since then, but it makes sense to wait on moving
extent_* code.

-chris