Re: Page Colouring (was: 2.6.0 Huge pages not working as expected)

[William Lee Irwin III <wli@holomorphy.com>]

On Sat, Dec 27, 2003 at 08:53:30PM -0800, Linus Torvalds wrote:
>>> Yes. This is something I actually want to do anyway for 2.7.x. Dan 
>>> Phillips had some patches for this six months ago.
>>> You have to be careful, since you have to be able to mmap "partial pages", 
>>> which is what makes it less than trivial, but there are tons of reasons to 
>>> want to do this, and cache coloring is actually very much a secondary 
>>> concern.

On Sun, Dec 28, 2003 at 08:39:52AM -0800, William Lee Irwin III wrote:
>> I've not seen Dan Phillips' code for this. I've been hacking on
>> something doing this since late last December.

On Sun, Dec 28, 2003 at 04:36:31PM -0800, Mike Fedyk wrote:
> I remember his work on pagetable sharing, but haven't heard anything about
> changing the page size from him.
> Could this be what Linus is remembering?

Doubtful. I suspect he may be referring to pgcl (sometimes called
"subpages"), though Dan Phillips hasn't been involved in it. I guess
we'll have to wait for Linus to respond to know for sure.


-- wli