linux-kernel - Re: [QUICKLIST 0/6] Arch independent quicklists V1

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Message-Id: <20070315003916.8a78dd0c.akpm@linux-foundation.org>
Date:	Thu, 15 Mar 2007 00:39:16 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Miller <davem@...emloft.net>
Cc:	paulus@...ba.org, clameter@....com, linux-kernel@...r.kernel.org,
	ak@...e.com, holt@....com, linux-ia64@...r.kernel.org,
	mpm@...enic.com
Subject: Re: [QUICKLIST 0/6] Arch independent quicklists V1

> On Thu, 15 Mar 2007 00:31:18 -0700 (PDT) David Miller <davem@...emloft.net> wrote:
> From: Andrew Morton <akpm@...ux-foundation.org>
> Date: Thu, 15 Mar 2007 00:22:49 -0800
> 
> > So...  what would happen if sparc64 were to use neither quicklists nor
> > slab?  Just grab these pages from the page allocator and clear them?
> 
> The page table allocator is heavier weight than the quicklists,
> although obviously not as heavy weight as SLAB.

Spose so, although only in the case where we go into the buddy lists, I hope.

otoh, releasing a cache-hot page into the page allocator makes it available for
other use.

It'd be nice if you could run the numbers sometime, please - if it's OK then
we can remove code...
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