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?
Do you mean it still don't support hod-add after apply this patchset?
> Scott Branden (2):
> arm64: memory-hotplug: Add MEMORY_HOTPLUG, MEMORY_HOTREMOVE,
> 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(+)