From: Amerigo Wang <amwang@redhat.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
linux-kernel@vger.kernel.org, tony.luck@intel.com,
linux-ia64@vger.kernel.org, linux-mm@kvack.org,
Neil Horman <nhorman@redhat.com>,
Andi Kleen <andi@firstfloor.org>,
akpm@linux-foundation.org, bernhard.walle@gmx.de,
Fenghua Yu <fenghua.yu@intel.com>, Ingo Molnar <mingo@elte.hu>,
Anton Vorontsov <avorontsov@ru.mvista.com>
Subject: Re: [Patch 8/8] kexec: allow to shrink reserved memory
Date: Tue, 18 Aug 2009 18:35:32 +0800 [thread overview]
Message-ID: <4A8A83F4.6010408@redhat.com> (raw)
In-Reply-To: <20090818172552.779d0768.kamezawa.hiroyu@jp.fujitsu.com>
KAMEZAWA Hiroyuki wrote:
> On Tue, 18 Aug 2009 14:31:23 +0800
> Amerigo Wang <amwang@redhat.com> wrote:
>
>>> It's hidden from the system before mem_init() ?
>>>
>>>
>> Not sure, but probably yes. It is reserved in setup_arch() which is
>> before mm_init() which calls mem_init().
>>
>> Do you have any advice to free that reserved memory after boot? :)
>>
>>
>
> Let's see arch/x86/mm/init.c::free_initmem()
>
> Maybe it's all you want.
>
> - ClearPageReserved()
> - init_page_count()
> - free_page()
> - totalram_pages++
>
Just FYI: calling ClearPageReserved() caused an oops: "Unable to handle
paging request".
I am trying to figure out why...
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next prev parent reply other threads:[~2009-08-18 10:40 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090812081731.5757.25254.sendpatchset@localhost.localdomain>
[not found] ` <20090812081906.5757.39417.sendpatchset@localhost.localdomain>
[not found] ` <m1bpmk8l1g.fsf@fess.ebiederm.org>
2009-08-13 3:32 ` Amerigo Wang
2009-08-13 6:18 ` Eric W. Biederman
2009-08-13 8:23 ` Amerigo Wang
2009-08-14 22:17 ` Eric W. Biederman
2009-08-17 9:50 ` Amerigo Wang
2009-08-18 0:29 ` KAMEZAWA Hiroyuki
2009-08-18 6:31 ` Amerigo Wang
2009-08-18 8:25 ` KAMEZAWA Hiroyuki
2009-08-18 8:51 ` Amerigo Wang
2009-08-18 10:35 ` Amerigo Wang [this message]
2009-08-18 23:57 ` KAMEZAWA Hiroyuki
2009-08-19 2:41 ` Amerigo Wang
2009-08-19 8:13 ` KAMEZAWA Hiroyuki
2009-08-19 10:47 ` Amerigo Wang
2009-08-20 9:15 ` Amerigo Wang
2009-08-21 0:34 ` KAMEZAWA Hiroyuki
2009-08-21 1:59 ` Amerigo Wang
2009-08-21 2:03 ` KAMEZAWA Hiroyuki
2009-08-21 2:47 ` Amerigo Wang
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