linux-kernel - Re: [PATCH v2 0/3] acpi,memory-hotplug : implement framework for hot removing memory

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Date:	Fri, 19 Oct 2012 19:19:53 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	<wency@...fujitsu.com>
CC:	<linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
	<linux-acpi@...r.kernel.org>, <liuj97@...il.com>,
	<len.brown@...el.com>, <akpm@...ux-foundation.org>,
	<kosaki.motohiro@...fujitsu.com>, <muneda.takahiro@...fujitsu.com>,
	<rjw@...k.pl>
Subject: Re: [PATCH v2 0/3] acpi,memory-hotplug : implement framework for
 hot removing memory

CCing Rafael, because he become ACPI Maintainer.

Hi Wen,

If you update the patch-set, please CCing Rafael from the next time.

Thanks,
Yasuaki Ishimatsu

2012/10/19 19:03, wency@...fujitsu.com wrote:
> From: Wen Congyang <wency@...fujitsu.com>
> 
> The patch-set implements a framework for hot removing memory.
> 
> 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().
> 
> The last version of this patchset is here:
> https://lkml.org/lkml/2012/10/3/126
> 
> Changelos from v1 to v2:
>    Patch1: use acpi_bus_trim() instead of acpi_bus_remove()
>    Patch2: new patch, introduce a lock to protect the list
>    Patch3: remove memory too when type is ACPI_BUS_REMOVAL_NORMAL
>    Note: I don't send [Patch2-4 v1] in this series because they
>    are no logical changes in these 3 patches.
> 
> Wen Congyang (2):
>    acpi,memory-hotplug: call acpi_bus_trim() to remove memory device
>    acpi,memory-hotplug: introduce a mutex lock to protect the list in
>      acpi_memory_device
> 
> Yasuaki Ishimatsu (1):
>    acpi,memory-hotplug : add memory offline code to
>      acpi_memory_device_remove()
> 
>   drivers/acpi/acpi_memhotplug.c |   51 ++++++++++++++++++++++++++++++++--------
>   1 files changed, 41 insertions(+), 10 deletions(-)
> 


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