Re: [RFC v8 PATCH 00/20] memory-hotplug: hot-remove physical memory
From: Andrew Morton <akpm@linux-foundation.org>
Date: 2012-08-31 20:50:00
Also in:
linux-acpi, linux-mm, linux-s390, linux-sh, lkml, sparclinux
On Tue, 28 Aug 2012 18:00:07 +0800 wency@cn.fujitsu.com wrote:
This patch series aims to support physical memory hot-remove.
Have you had much review and testing feedback yet?
The patches can free/remove the following things:
- acpi_memory_info : [RFC PATCH 4/19]
- /sys/firmware/memmap/X/{end, start, type} : [RFC PATCH 8/19]
- iomem_resource : [RFC PATCH 9/19]
- mem_section and related sysfs files : [RFC PATCH 10-11, 13-16/19]
- page table of removed memory : [RFC PATCH 12/19]
- node and related sysfs files : [RFC PATCH 18-19/19]
If you find lack of function for physical memory hot-remove, please let me
know.I doubt if many people have hardware which permits physical memory removal? How would you suggest that people with regular hardware can test these chagnes?
Known problems: 1. memory can't be offlined when CONFIG_MEMCG is selected.
That's quite a problem! Do you have a description of why this is the case, and a plan for fixing it?