| From: |
| Scott Branden <scott.branden-AT-broadcom.com> |
| To: |
| Arnd Bergmann <arnd-AT-arndb.de>, Russell King <linux-AT-armlinux.org.uk>, Catalin Marinas <catalin.marinas-AT-arm.com>, Will Deacon <will.deacon-AT-arm.com>, Ard Biesheuvel <ard.biesheuvel-AT-linaro.org>, Mark Rutland <mark.rutland-AT-arm.com>, Xishi Qiu <qiuxishi-AT-huawei.com>, bielski-AT-fastmail.net |
| Subject: |
| [RFC PATCH 0/2] arm64: memory-hotplug: Add Memory Hotplug support |
| Date: |
| Thu, 1 Dec 2016 16:19:57 -0800 |
| Message-ID: |
| <1480637999-4320-1-git-send-email-scott.branden@broadcom.com> |
| Cc: |
| BCM Kernel Feedback <bcm-kernel-feedback-list-AT-broadcom.com>, Tang Chen <tangchen-AT-cn.fujitsu.com>, linux-arm-kernel-AT-lists.infradead.org, linux-kernel-AT-vger.kernel.org, Scott Branden <scott.branden-AT-broadcom.com> |
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
