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Date: Thu, 15 Nov 2012 15:03:11 -0800 (PST)
From: David Rientjes <rientjes@google.com>
Subject: Re: [Patch v5 1/7] acpi,memory-hotplug : add memory offline code to
 acpi_memory_device_remove()
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To: Wen Congyang <wency@cn.fujitsu.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-acpi@vger.kernel.org, Len Brown <len.brown@intel.com>, "Rafael J. Wysocki" <rjw@sisk.pl>, Andrew Morton <akpm@linux-foundation.org>, Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>, Lai Jiangshan <laijs@cn.fujitsu.com>, Jiang Liu <jiang.liu@huawei.com>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Minchan Kim <minchan.kim@gmail.com>, Mel Gorman <mgorman@suse.de>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Toshi Kani <toshi.kani@hp.com>, Jiang Liu <liuj97@gmail.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Christoph Lameter <cl@linux.com>

On Thu, 15 Nov 2012, Wen Congyang wrote:

> From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
> 
> 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 move offlining memory and releasing acpi_memory_info struct
> codes to a new function acpi_memory_remove_memory(). And it is used by both
> acpi_memory_device_remove() and acpi_memory_disable_device().
> 
> CC: David Rientjes <rientjes@google.com>
> CC: Jiang Liu <liuj97@gmail.com>
> CC: Len Brown <len.brown@intel.com>
> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> CC: Paul Mackerras <paulus@samba.org>
> CC: Christoph Lameter <cl@linux.com>
> Cc: Minchan Kim <minchan.kim@gmail.com>
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> CC: Rafael J. Wysocki <rjw@sisk.pl>
> CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>

Acked-by: David Rientjes <rientjes@google.com>

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