Commit bbcab878 authored Feb 22, 2013 by Tang Chen Committed by Linus Torvalds Feb 23, 2013

memory-hotplug: remove page table of x86_64 architecture



Search a page table about the removed memory, and clear page table for
x86_64 architecture.

[akpm@linux-foundation.org: make kernel_physical_mapping_remove() static]
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Wu Jianguo <wujianguo@huawei.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent ae9aae9e

arch/x86/mm/init_64.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -1011,6 +1011,15 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct)
		flush_tlb_all();
		}

		static void __meminit
		kernel_physical_mapping_remove(unsigned long start, unsigned long end)
		{
		start = (unsigned long)__va(start);
		end = (unsigned long)__va(end);

		remove_pagetable(start, end, true);
		}

		#ifdef CONFIG_MEMORY_HOTREMOVE
		int __ref arch_remove_memory(u64 start, u64 size)
		{
		@@ -1020,6 +1029,7 @@ int __ref arch_remove_memory(u64 start, u64 size)
		int ret;

		zone = page_zone(pfn_to_page(start_pfn));
		kernel_physical_mapping_remove(start, start + size);
		ret = __remove_pages(zone, start_pfn, nr_pages);
		WARN_ON_ONCE(ret);