[PATCH v5 09/14] memory-hotplug: remove page table of x86_64 architecture
From: Tang Chen <hidden>
Date: 2012-12-24 12:13:21
Also in:
linux-acpi, linux-mm, linux-s390, linux-sh, lkml, sparclinux
Subsystem:
the rest, x86 architecture (32-bit and 64-bit), x86 mm · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, Andy Lutomirski, Peter Zijlstra
This patch searches a page table about the removed memory, and clear page table for x86_64 architecture. Signed-off-by: Wen Congyang <redacted> Signed-off-by: Jianguo Wu <redacted> Signed-off-by: Jiang Liu <redacted> Signed-off-by: Tang Chen <redacted> --- arch/x86/mm/init_64.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index b30df3c..4b160d8 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c@@ -979,6 +979,15 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct) flush_tlb_all(); } +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) {
@@ -988,6 +997,7 @@ 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);
--
1.7.1