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? 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(+) -- 2.5.0