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:
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?
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(+)