From: Will Huck <will.huckk@gmail.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"jiang.liu@huawei.com" <jiang.liu@huawei.com>,
"wujianguo@huawei.com" <wujianguo@huawei.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"wency@cn.fujitsu.com" <wency@cn.fujitsu.com>,
"laijs@cn.fujitsu.com" <laijs@cn.fujitsu.com>,
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"yinghai@kernel.org" <yinghai@kernel.org>,
"isimatu.yasuaki@jp.fujitsu.com" <isimatu.yasuaki@jp.fujitsu.com>,
"rob@landley.net" <rob@landley.net>,
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"jaegeuk.hanse@gmail.com" <jaegeuk.hanse@gmail.com>,
"glommer@parallels.com" <glommer@parallels.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [Bug fix PATCH 1/2] acpi, movablemem_map: Exclude memblock.reserved ranges when parsing SRAT.
Date: Mon, 25 Feb 2013 15:07:53 +0800 [thread overview]
Message-ID: <512B0DC9.5010102@gmail.com> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F1E06B636@ORSMSX108.amr.corp.intel.com>
On 02/21/2013 08:23 AM, Luck, Tony wrote:
>> Thanks for your clarify. What's the relationship between memory ranges
>> and address ranges here?
> The ranges in the SRAT table might cover more memory than is present on
> the system. E.g. on some large Itanium systems the SRAT table would say
> that 0-1TB was on node0, 1-2TB on node1, etc.
>
> The EFI memory map described the memory actually present (perhaps just
> a handful of GB on each node).
>
> X86 systems tend not to have such radically sparse layouts, so this may be less
> of a distinction.
>
>> What's the relationship between memory/address ranges and /proc/iomem?
> I *think* that /proc/iomem just shows what is in e820 (for the memory entries,
> it also adds in I/O ranges that come from other ACPI sources).
Funtion detect_memory use int 0x15 to get e820 memory map information,
but why the address range is not contigous and seprate to several ranges?
>
> -Tony
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next prev parent reply other threads:[~2013-02-25 7:08 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-20 11:00 [Bug fix PATCH 0/2] Make whatever node kernel resides in un-hotpluggable Tang Chen
2013-02-20 11:00 ` [Bug fix PATCH 1/2] acpi, movablemem_map: Exclude memblock.reserved ranges when parsing SRAT Tang Chen
2013-02-20 12:31 ` Tang Chen
2013-02-20 12:35 ` Will Huck
2013-02-20 22:41 ` Luck, Tony
2013-02-21 0:05 ` Will Huck
2013-02-21 0:23 ` Luck, Tony
2013-02-25 7:07 ` Will Huck [this message]
2013-02-25 9:01 ` Will Huck
2013-02-25 1:35 ` Will Huck
2013-02-25 3:32 ` Tang Chen
2013-02-25 19:06 ` Luck, Tony
2013-02-20 11:00 ` [Bug fix PATCH 2/2] acpi, movablemem_map: Make whatever nodes the kernel resides in un-hotpluggable Tang Chen
2013-02-23 19:26 ` Rob Landley
2013-02-25 2:54 ` Tang Chen
2013-02-20 21:36 ` [Bug fix PATCH 0/2] Make whatever node " Andrew Morton
2013-02-21 3:03 ` Tang Chen
2013-02-21 7:03 ` Tang Chen
2013-02-23 19:40 ` Rob Landley
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