From 35b36c2d33835255e4da39e3e19aaf8a19f7b6d6 Mon Sep 17 00:00:00 2001
From: Balazs Gerofi <bgerofi@riken.jp>
Date: Wed, 17 May 2017 02:17:04 +0900
Subject: [PATCH] move_pages_smp_handler(): more parallelization

---
 kernel/syscall.c | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/kernel/syscall.c b/kernel/syscall.c
index 83df6ce2..f5163e19 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -8178,7 +8178,7 @@ int move_pages_smp_handler(int cpu_index, int nr_cpus, void *arg)
 				break;
 		}
 	}
-	else if (nr_cpus >= 4) {
+	else if (nr_cpus >= 4 && nr_cpus < 8) {
 		switch (cpu_index) {
 			case 0:
 				memcpy(mpsr->virt_addr, mpsr->user_virt_addr,
@@ -8205,6 +8205,44 @@ int move_pages_smp_handler(int cpu_index, int nr_cpus, void *arg)
 				break;
 		}
 	}
+	else if (nr_cpus >= 8) {
+		switch (cpu_index) {
+			case 0:
+				memcpy(mpsr->virt_addr, mpsr->user_virt_addr,
+						sizeof(void *) * (count / 2));
+				break;
+			case 1:
+				memcpy(mpsr->virt_addr + (count / 2),
+						mpsr->user_virt_addr + (count / 2),
+						sizeof(void *) * (count / 2));
+				break;
+			case 2:
+				memcpy(mpsr->status, mpsr->user_status,
+						sizeof(int) * count);
+				break;
+			case 3:
+				memcpy(mpsr->nodes, mpsr->user_nodes,
+						sizeof(int) * count);
+				mpsr->nodes_ready = 1;
+				break;
+			case 4:
+				memset(mpsr->ptep, 0, sizeof(pte_t) * count);
+				break;
+			case 5:
+				memset(mpsr->status, 0, sizeof(int) * count);
+				break;
+			case 6:
+				memset(mpsr->nr_pages, 0, sizeof(int) * count);
+				break;
+			case 7:
+				memset(mpsr->dst_phys, 0,
+						sizeof(unsigned long) * count);
+				break;
+
+			default:
+				break;
+		}
+	}
 
 	while (!(volatile int)mpsr->nodes_ready) {
 		cpu_pause();