Re: [Patch 8/8] kexec: allow to shrink reserved memory
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- To: Amerigo Wang <amwang@xxxxxxxxxx>
- Subject: Re: [Patch 8/8] kexec: allow to shrink reserved memory
- From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
- Date: Fri, 21 Aug 2009 09:34:52 +0900
- Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, tony.luck@xxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Neil Horman <nhorman@xxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, akpm@xxxxxxxxxxxxxxxxxxxx, bernhard.walle@xxxxxx, Fenghua Yu <fenghua.yu@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
- In-reply-to: <4A8D144C.5050005@xxxxxxxxxx>
- List-id: <linux-ia64.vger.kernel.org>
- Organization: FUJITSU Co. LTD.
- References: <20090812081731.5757.25254.sendpatchset@xxxxxxxxxxxxxxxxxxxxx> <20090812081906.5757.39417.sendpatchset@xxxxxxxxxxxxxxxxxxxxx> <m1bpmk8l1g.fsf@xxxxxxxxxxxxxxxxx> <4A83893D.50707@xxxxxxxxxx> <m1eirg5j9i.fsf@xxxxxxxxxxxxxxxxx> <4A83CD84.8040609@xxxxxxxxxx> <m1tz0avy4h.fsf@xxxxxxxxxxxxxxxxx> <4A8927DD.6060209@xxxxxxxxxx> <20090818092939.2efbe158.kamezawa.hiroyu@xxxxxxxxxxxxxx> <4A8A4ABB.70003@xxxxxxxxxx> <20090818172552.779d0768.kamezawa.hiroyu@xxxxxxxxxxxxxx> <4A8A83F4.6010408@xxxxxxxxxx> <20090819085703.ccf9992a.kamezawa.hiroyu@xxxxxxxxxxxxxx> <4A8B6649.3080103@xxxxxxxxxx> <20090819171346.aadfeb2c.kamezawa.hiroyu@xxxxxxxxxxxxxx> <4A8D144C.5050005@xxxxxxxxxx>
On Thu, 20 Aug 2009 17:15:56 +0800
Amerigo Wang <amwang@xxxxxxxxxx> wrote:
> > The, problem is whether memmap is there or not. That's all.
> > plz see init sequence and check there are memmap.
> > If memory-for-crash is obtained via bootmem,
> > Don't you try to free memory hole ?
> >
>
> Hi,
>
> It looks like that mem_map has 'struct page' for the reserved memory, I
> checked my "early_node_map[] active PFN ranges" output, the reserved
> memory area for crash kernel is right in one range. Am I missing
> something here?
>
> I don't know why that oops comes out, maybe because of no PTE for thoese
> pages?
>
Hmm ? Could you show me the code you use ?
Thanks,
-Kame
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