This patch searches a page table about the removed memory, and clear
page table for x86_64 architecture.
Signed-off-by: Wen Congyang <we...@cn.fujitsu.com>
Signed-off-by: Jianguo Wu <wujian...@huawei.com>
Signed-off-by: Jiang Liu <jiang....@huawei.com>
Signed-off-by: Tang Chen <tangc...@cn.fujitsu.com>
---
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 fe01116..d950f9b 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -981,6 +981,15 @@ 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)
{
@@ -990,6 +999,7 @@ 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
