[PATCH] KVM: arm64: Consider NUMA affinity when allocating per-CPU stack_page

[Li RongQing]

per-CPU stack_page are dominantly accessed from their own local CPUs,
so allocate them node-local to improve performance.

Signed-off-by: Li RongQing <lirongqing at baidu.com>
---
 arch/arm64/kvm/arm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index c4a0a35..d745d01 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2330,15 +2330,15 @@ static int __init init_hyp_mode(void)
 	 * Allocate stack pages for Hypervisor-mode
 	 */
 	for_each_possible_cpu(cpu) {
-		unsigned long stack_page;
+		struct page *page;
 
-		stack_page = __get_free_page(GFP_KERNEL);
-		if (!stack_page) {
+		page = alloc_pages_node(cpu_to_node(cpu), GFP_KERNEL, 0);
+		if (!page) {
 			err = -ENOMEM;
 			goto out_err;
 		}
 
-		per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page;
+		per_cpu(kvm_arm_hyp_stack_page, cpu) = page_address(page);
 	}
 
 	/*
-- 
2.9.4