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From: Tang Chen <tangchen@cn.fujitsu.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-s390@vger.kernel.org, linux-ia64@vger.kernel.org,
	Wen Congyang <wency@cn.fujitsu.com>,
	linux-acpi@vger.kernel.org, linux-sh@vger.kernel.org,
	Len Brown <len.brown@intel.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	cmetcalf@tilera.com, Jianguo Wu <wujianguo@huawei.com>,
	linux-mm@kvack.org,
	Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>,
	paulus@samba.org, Minchan Kim <minchan.kim@gmail.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	David Rientjes <rientjes@google.com>,
	sparclinux@vger.kernel.org, Christoph Lameter <cl@linux.com>,
	linuxppc-dev@lists.ozlabs.org, Jiang Liu <liuj97@gmail.com>
Subject: Re: [Patch v4 00/12] memory-hotplug: hot-remove physical memory
Date: Fri, 30 Nov 2012 14:37:41 +0800	[thread overview]
Message-ID: <50B85435.8020907@cn.fujitsu.com> (raw)
In-Reply-To: <20121127112741.b616c2f6.akpm@linux-foundation.org>

Hi Andrew,

On 11/28/2012 03:27 AM, Andrew Morton wrote:
>>
>> - acpi framework
>>    https://lkml.org/lkml/2012/10/26/175
>
> What's happening with the acpi framework?  has it received any feedback
> from the ACPI developers?

About ACPI framework, we are trying to do the following.

     The memory device can be removed by 2 ways:
     1. send eject request by SCI
     2. echo 1 >/sys/bus/pci/devices/PNP0C80:XX/eject

     In the 1st case, acpi_memory_disable_device() will be called.
     In the 2nd case, acpi_memory_device_remove() will be called.
     acpi_memory_device_remove() will also be called when we unbind the
     memory device from the driver acpi_memhotplug or a driver
     initialization fails.

     acpi_memory_disable_device() has already implemented a code which
     offlines memory and releases acpi_memory_info struct . But
     acpi_memory_device_remove() has not implemented it yet.

     So the patch prepares the framework for hot removing memory and
     adds the framework into acpi_memory_device_remove().

All the ACPI related patches have been put into the linux-next branch
of the linux-pm.git tree as v3.8 material.Please refer to the following
url.
https://lkml.org/lkml/2012/11/2/160

So for now, with this patch set, we can do memory hot-remove on x86_64
linux.

I do hope you would merge them before 3.8-rc1, so that we can use this
functionality in 3.8.

As we are still testing all memory hotplug related functionalities, I
hope we can do the bug fix during 3.8 rc.

Thanks. :)

      parent reply	other threads:[~2012-11-30  6:38 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-27 10:00 [Patch v4 00/12] memory-hotplug: hot-remove physical memory Wen Congyang
2012-11-27 10:00 ` [Patch v4 01/12] memory-hotplug: try to offline the memory twice to avoid dependence Wen Congyang
2012-12-04  9:17   ` Tang Chen
2012-11-27 10:00 ` [Patch v4 02/12] memory-hotplug: check whether all memory blocks are offlined or not when removing memory Wen Congyang
2012-12-04  9:22   ` Tang Chen
2012-11-27 10:00 ` [Patch v4 03/12] memory-hotplug: remove redundant codes Wen Congyang
2012-12-04  9:22   ` Tang Chen
2012-12-04 10:31     ` Tang Chen
2012-11-27 10:00 ` [Patch v4 04/12] memory-hotplug: remove /sys/firmware/memmap/X sysfs Wen Congyang
2012-11-27 10:00 ` [Patch v4 05/12] memory-hotplug: introduce new function arch_remove_memory() for removing page table depends on architecture Wen Congyang
2012-12-04  9:30   ` Tang Chen
2012-11-27 10:00 ` [Patch v4 06/12] memory-hotplug: unregister memory section on SPARSEMEM_VMEMMAP Wen Congyang
2012-12-04  9:34   ` Tang Chen
2012-11-27 10:00 ` [Patch v4 07/12] memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap Wen Congyang
2012-11-27 10:00 ` [Patch v4 08/12] memory-hotplug: remove memmap " Wen Congyang
2012-11-28  9:40   ` Jianguo Wu
2012-11-30  1:45     ` Wen Congyang
2012-11-30  2:47       ` Jianguo Wu
2012-11-30  2:55         ` Yasuaki Ishimatsu
2012-12-03  2:23       ` Jianguo Wu
2012-12-04  9:13         ` Tang Chen
2012-12-04 12:20           ` Jianguo Wu
2012-12-05  2:07             ` Tang Chen
2012-12-05  3:23               ` Jianguo Wu
2012-12-07  1:42         ` Tang Chen
2012-12-07  2:20           ` Jianguo Wu
2012-12-04  9:47   ` Tang Chen
2012-11-27 10:00 ` [Patch v4 09/12] memory-hotplug: remove page table of x86_64 architecture Wen Congyang
2012-12-07  6:43   ` Tang Chen
2012-12-07  7:06     ` Jianguo Wu
2012-11-27 10:00 ` [Patch v4 10/12] memory-hotplug: memory_hotplug: clear zone when removing the memory Wen Congyang
2012-12-04 10:09   ` Tang Chen
2012-11-27 10:00 ` [Patch v4 11/12] memory-hotplug: remove sysfs file of node Wen Congyang
2012-12-04 10:10   ` Tang Chen
2012-11-27 10:00 ` [Patch v4 12/12] memory-hotplug: free node_data when a node is offlined Wen Congyang
2012-12-04 10:10   ` Tang Chen
2012-11-27 19:27 ` [Patch v4 00/12] memory-hotplug: hot-remove physical memory Andrew Morton
2012-11-27 19:38   ` Rafael J. Wysocki
2012-11-28  0:43   ` Yasuaki Ishimatsu
2012-11-30  6:37   ` Tang Chen [this message]

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