From: Hiroyuki KAMEZAWA <kamezawa.hiroyu@jp.fujitsu.com>
To: Andy Whitcroft <apw@shadowen.org>
Cc: lhms-devel@lists.sourceforge.net, linux-mm@kvack.org
Subject: Re: [Lhms-devel] CONFIG_NONLINEAR for small systems
Date: Tue, 19 Oct 2004 13:30:24 +0900 [thread overview]
Message-ID: <41749860.9070503@jp.fujitsu.com> (raw)
In-Reply-To: <4173D219.3010706@shadowen.org>
Hi,
Andy Whitcroft wrote:
> The generalised CONFIG_NONLINEAR memory model described at OLS
> seemed provide more than enough decriptive power to address this
> issue but provided far more functionality that was required.
> Particularly it breaks the identity V=P+c to allow compression of
> the kernel address space, which is not required on these smaller systems.
>
We have *future* issue to hotplug kernel memory and kernel's virtual address renaming
will be used for it.
As you say, if kernel memory is not remaped, keeping V=P+c looks good.
But our current direction is to enable kernel-memory-hotplug, which
needs kernel's virtual memory renaming, I think.
NONLINEAR_OPTIMISED looks a bit complicated.
Can replace them with some other name ? Hmm...NONLINEAR_NOREMAP ?
> This patch set is implemented as a proof-of-concept to show
> that a simplified CONFIG_NONLINEAR based implementation could provide
> sufficient flexibility to solve the problems for these systems.
>
Very interesting. But I'm not sure whether we can use more page->flags bit :[.
I recommend you not to use more page->flags bits.
Kame <kamezawa.hiroyu@jp.fujitsu.com>
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next prev parent reply other threads:[~2004-10-19 4:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-18 14:24 Andy Whitcroft
2004-10-18 14:32 ` 050 bootmem use NODE_DATA Andy Whitcroft
2004-10-26 18:16 ` Dave Hansen
2004-10-18 14:33 ` 060 refactor setup_memory i386 Andy Whitcroft
2004-10-18 14:34 ` 080 alloc_remap i386 Andy Whitcroft
2004-10-18 14:35 ` 100 cleanup node zone Andy Whitcroft
2004-10-18 14:35 ` 150 nonlinear Andy Whitcroft
2004-10-26 18:36 ` Dave Hansen
2004-10-26 19:07 ` [Lhms-devel] " Mika Penttilä
2004-10-26 19:42 ` Dave Hansen
2004-10-26 20:41 ` Mika Penttilä
2004-10-26 20:55 ` Dave Hansen
2004-10-26 21:20 ` Mika Penttilä
2004-10-26 21:27 ` Dave Hansen
2004-10-26 21:38 ` Mika Penttilä
2004-10-26 21:41 ` Dave Hansen
2004-10-26 21:55 ` Mika Penttilä
2004-10-26 21:53 ` Dave Hansen
2004-10-26 22:01 ` Mika Penttilä
2004-10-28 11:07 ` Andy Whitcroft
2004-10-18 14:36 ` 160 nonlinear i386 Andy Whitcroft
2004-10-18 14:36 ` 170 nonlinear ppc64 Andy Whitcroft
2004-10-18 15:17 ` [Lhms-devel] CONFIG_NONLINEAR for small systems Hirokazu Takahashi
2004-10-18 15:29 ` Andy Whitcroft
2004-10-19 4:30 ` Hiroyuki KAMEZAWA [this message]
2004-10-19 8:16 ` Andy Whitcroft
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