Re: [RFC PATCH 0/8] memory-hotplug : hot-remove physical memory(clearpage table)

[Wen Congyang]

At 07/20/2012 03:31 PM, Yasuaki Ishimatsu Wrote:
> [Hi Wen,
> 
> Good news!! I was waiting for this patch to come.
> Applying the patches, can we hot-remove physical memory completely?

If all functions success, I guess so.

Thanks
Wen Congyang

> 
> Thanks,
> Yasuaki Ishimatsu
> 
> 2012/07/20 16:06, Wen Congyang wrote:
>> This patch series aims to support physical memory hot-remove(clear
>> page table).
>>
>> This patch series base on ishimatsu's patch series. You can get it here:
>> http://www.spinics.net/lists/linux-acpi/msg36804.html
>>
>> The patches can remove following things:
>>    - page table of removed memory
>>
>> If you find lack of function for physical memory hot-remove, please
>> let me
>> know.
>>
>> Note:
>> * The patch "remove memory info from list before freeing it" is being
>> disccussed
>>    in other thread. But for testing the patch series, the patch is
>> needed.
>>    So I added the patch as [PATCH 0/8].
>> * You need to apply ishimatsu's patch series first before applying
>> this patch
>>    series.
>>
>> Wen Congyang (8):
>>    memory-hotplug: store the node id in acpi_memory_device
>>    memory-hotplug: offline memory only when it is onlined
>>    memory-hotplug: call remove_memory() to cleanup when removing memory
>>      device
>>    memory-hotplug: export the function acpi_bus_remove()
>>    memory-hotplug: call acpi_bus_remove() to remove memory device
>>    memory-hotplug: introduce new function arch_remove_memory()
>>    x86: make __split_large_page() generally avialable
>>    memory-hotplug: implement arch_remove_memory()
>>
>>   arch/ia64/mm/init.c                  |   16 ++++
>>   arch/powerpc/mm/mem.c                |   14 +++
>>   arch/s390/mm/init.c                  |    8 ++
>>   arch/sh/mm/init.c                    |   15 +++
>>   arch/tile/mm/init.c                  |    8 ++
>>   arch/x86/include/asm/pgtable_types.h |    1 +
>>   arch/x86/mm/init_32.c                |   10 ++
>>   arch/x86/mm/init_64.c                |  160
>> ++++++++++++++++++++++++++++++++++
>>   arch/x86/mm/pageattr.c               |   47 +++++-----
>>   drivers/acpi/acpi_memhotplug.c       |   24 ++++--
>>   drivers/acpi/scan.c                  |    3 +-
>>   include/acpi/acpi_bus.h              |    1 +
>>   include/linux/memory_hotplug.h       |    1 +
>>   mm/memory_hotplug.c                  |    2 +-
>>   14 files changed, 280 insertions(+), 30 deletions(-)
>>
> 
> 
> 

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