On Thu, Jul 26, 2007 at 06:32:56AM -0400, Jeff Garzik wrote:

Is this based on Christoph's work?

Christoph, or some other XFS hacker, already did generic delalloc, 
modeled on the XFS delalloc code.

This is not based on my attempt to make the xfs writeout path generic.
Alex's variant is a lot simpler and thus missed various bits required
for high sustained writeout performance or xfs functionality.

That doesn't mean I want to arge against Alex's code although I'd of
course be more happy if we could actually shared code between multiple
filesystems.

Of ourse the code in it's current form should not go into mpage.c but
rather into ext4 so that it doesn't bloat the kernel for everyone.