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authorTang Chen <tangchen@cn.fujitsu.com>2013-02-23 04:33:06 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-24 05:50:12 +0400
commitbbcab8789d4a5b942773aa7496794ceebe2d3f78 (patch)
treea57c8765ccd0e336ce423249f186c8603abdc9e3 /arch
parentae9aae9eda2db71bf4b592f15618b0160eb07731 (diff)
downloadlinux-bbcab8789d4a5b942773aa7496794ceebe2d3f78.tar.xz
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/mm/init_64.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index ca6cd403a275..4e58b83e6b2e 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -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);