linux-kernel - Re: [QUICKLIST 2/6] i386: quicklist support

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Date:	Sat, 10 Mar 2007 19:22:13 -0800
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Christoph Lameter <clameter@....com>
Cc:	linux-kernel@...r.kernel.org, ak@...e.com,
	linux-ia64@...r.kernel.org, holt@....com, mpm@...enic.com
Subject: Re: [QUICKLIST 2/6] i386: quicklist support

On Sat, Mar 10, 2007 at 06:09:34PM -0800, Christoph Lameter wrote:
> i386: Convert to quicklists
> Implement the i386 management of pgd and pmds using quicklists.

I approve, though it would be nice if ptes had an interface operating
on struct page * to use.


On Sat, Mar 10, 2007 at 06:09:34PM -0800, Christoph Lameter wrote:
> The i386 management of page table pages currently uses page sized slabs.
> The page state is therefore mainly determined by the slab code. However,
> i386 also uses its own fields in the page struct to mark special pages
> and to build a list of pgds using the ->private and ->index field (yuck!).
> This has been finely tuned to work right with SLAB but SLUB needs more
> control over the page struct. Currently the only way for SLUB to support
> these slabs is through special casing PAGE_SIZE slabs.
> If we use quicklists instead then we can avoid the mess, and also the
> overhead of manipulating page sized objects through slab.

Hey! I did quite well given the constraints under which I was operating.


-- wli
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