linux-kernel - Re: [RFC][PATCH 0/3] kcore: clean up and update ram information properly

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Message-ID: <873a8q2s0a.fsf@basil.nowhere.org>
Date:	Tue, 21 Jul 2009 13:29:57 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, ebiederm@...ssion.com,
	xiyou.wangcong@...il.com, tao.ma@...cle.com,
	linux-kernel@...r.kernel.org, adobriyan@...il.com,
	mtk.manpages@...il.com, y-goto@...fujitsu.com
Subject: Re: [RFC][PATCH 0/3] kcore: clean up and update ram information properly

KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> writes:

> Now, /proc/kcore is built on kclist information which is constructed at boot.
> This kclist includes physical memory range information but not updated at
> memory hotplug. And, this information tends to includes big memory hole.
>
> On the other hand, /proc/iomem includes all physical memory information as
> "System RAM" and this is updated properly and kdump use this, IIUC. 
> (I hope all archtecuture stores necessary information...)
>
> This patch tries to build kclist for physical memory(direct map) on
> /proc/iomem info. It's refreshed at open("/proc/kcore",) if necesasry.
>
> This is just a RFC. Any comments are welcome.
>
> [1/3] ... clean up kclist handling.
> [2/3] ... clean up kclist_add()
> [3/3] ... use /proc/iomem information for /proc/kcore.

Great cleanup! Thanks.

The only missing part that we still need is to also include 
the kallsyms information, then the core would be even more useful.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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