Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option

From	Dave Hansen <dave.hansen@intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option
Date	2015-10-09 17:10 +0200
Message-ID	<qhHsZ-5GT-5@gated-at.bofh.it> (permalink)
References	<qhySK-1As-5@gated-at.bofh.it> <qhzOO-2W9-3@gated-at.bofh.it> <qhC9Y-6qx-21@gated-at.bofh.it> <qhDfI-7Wk-11@gated-at.bofh.it>
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On 10/09/2015 03:36 AM, Xishi Qiu wrote:
> I mean the mirrored region can not at the middle or end of the zone,
> BIOS should report the memory like this, 
> 
> e.g.
> BIOS
> node0: 0-4G mirrored, 4-8G mirrored, 8-16G non-mirrored
> node1: 16-24G mirrored, 24-32G non-mirrored
> 
> OS
> node0: DMA DMA32 are both mirrored, NORMAL(4-8G), MOVABLE(8-16G)
> node1: NORMAL(16-24G), MOVABLE(24-32G)

I understand if the mirrored regions are always at the start of the zone
today, but is that somehow guaranteed going forward on all future hardware?

I think it's important to at least consider what we would do if DMA32
turned out to be non-reliable.
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Thread

[PATCH][RFC] mm: Introduce kernelcore=reliable option Taku Izumi <izumi.taku@jp.fujitsu.com> - 2015-10-09 08:00 +0200
  Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option Xishi Qiu <qiuxishi@huawei.com> - 2015-10-09 09:00 +0200
    Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> - 2015-10-09 11:30 +0200
      Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option Xishi Qiu <qiuxishi@huawei.com> - 2015-10-09 12:40 +0200
        Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option Dave Hansen <dave.hansen@intel.com> - 2015-10-09 17:10 +0200
          RE: [PATCH][RFC] mm: Introduce kernelcore=reliable option "Luck, Tony" <tony.luck@intel.com> - 2015-10-09 21:00 +0200
            Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option Matt Fleming <matt@codeblueprint.co.uk> - 2015-10-12 12:40 +0200
        Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option Xishi Qiu <qiuxishi@huawei.com> - 2015-10-10 04:20 +0200
          RE: [PATCH][RFC] mm: Introduce kernelcore=reliable option "Luck, Tony" <tony.luck@intel.com> - 2015-10-12 20:50 +0200
        Re: [PATCH][RFC] mm: Introduce kernelcore=reliable option Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> - 2015-10-13 12:00 +0200
    RE: [PATCH][RFC] mm: Introduce kernelcore=reliable option "Luck, Tony" <tony.luck@intel.com> - 2015-10-09 23:50 +0200
      RE: [PATCH][RFC] mm: Introduce kernelcore=reliable option "Izumi, Taku" <izumi.taku@jp.fujitsu.com> - 2015-10-14 03:20 +0200

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