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Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support

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On 2016/12/2 8:19, Scott Branden wrote:

> This patchset is sent for comment to add memory hotplug support for ARM64
> based platforms.  It follows hotplug code added for other architectures
> in the linux kernel.
> 
> I tried testing the memory hotplug feature following documentation from
> Documentation/memory-hotplug.txt.  I don't think it is working as expected
> - see below:
> 
> To add memory to the system I did the following:
> echo 0x400000000 > /sys/devices/system/memory/probe
> 
> The memory is displayed as system ram:
> cat /proc/iomem:
> 74000000-77ffffff : System RAM
>   74080000-748dffff : Kernel code
>   74950000-749d2fff : Kernel data
> 400000000-43fffffff : System RAM
> 
> But does not seem to be added to the kernel memory.
> /proc/meminfo did not change.
> 
> What else needs to be done so the memory is added to the kernel memory
> pool for normal allocation?
> 

Hi Scott,

Do you mean it still don't support hod-add after apply this patchset?

Thanks,
Xishi Qiu

> Scott Branden (2):
>   arm64: memory-hotplug: Add MEMORY_HOTPLUG, MEMORY_HOTREMOVE,
>     MEMORY_PROBE
>   arm64: defconfig: enable MEMORY_HOTPLUG config options
> 
>  arch/arm64/Kconfig           | 10 ++++++++++
>  arch/arm64/configs/defconfig |  3 +++
>  arch/arm64/mm/init.c         | 42 ++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 55 insertions(+)
> 

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[RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Scott Branden <scott.branden@broadcom.com> - 2016-12-02 01:30 +0100
  [RFC PATCH 2/2] arm64: defconfig: enable MEMORY_HOTPLUG config options Scott Branden <scott.branden@broadcom.com> - 2016-12-02 01:30 +0100
  [RFC PATCH 1/2] arm64: memory-hotplug: Add MEMORY_HOTPLUG, MEMORY_HOTREMOVE, MEMORY_PROBE Scott Branden <scott.branden@broadcom.com> - 2016-12-02 01:30 +0100
  Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Xishi Qiu <qiuxishi@huawei.com> - 2016-12-02 03:00 +0100
    Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Scott Branden <scott.branden@broadcom.com> - 2016-12-02 03:40 +0100
      Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Xishi Qiu <qiuxishi@huawei.com> - 2016-12-02 04:20 +0100
        Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Scott Branden <scott.branden@broadcom.com> - 2016-12-07 09:50 +0100
          Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Xishi Qiu <qiuxishi@huawei.com> - 2016-12-07 12:30 +0100
  Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Maciej Bielski <m.bielski@virtualopensystems.com> - 2016-12-02 10:20 +0100
    Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Will Deacon <will.deacon@arm.com> - 2016-12-02 11:50 +0100
      Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Maciej Bielski <m.bielski@virtualopensystems.com> - 2016-12-02 12:00 +0100
        Re: [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support Scott Branden <scott.branden@broadcom.com> - 2016-12-02 18:50 +0100

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