内存管理之内存初始化内存管理...

Makefile

@@ -6,7 +6,7 @@ GITHUB_COMMIT := $(COMMIT)
 
 
 ifeq ($(COMMIT), )
-	GITHUB_COMMIT="更新了内存管理的目录结构..."
+	GITHUB_COMMIT="内存管理之内存初始化内存管理..."
 endif
 
 

study/kernel/02-memory/03-initialize/01-init_struct/test.c

@@ -0,0 +1,44 @@
+#ifdef CONFIG_NUMA
+/* The value user specified ....changed by config */
+static int user_zonelist_order = ZONELIST_ORDER_DEFAULT;
+/* string for sysctl */
+#define NUMA_ZONELIST_ORDER_LEN 16
+char numa_zonelist_order[16] = "default";
+
+/*
+ * interface for configure zonelist ordering.
+ * command line option "numa_zonelist_order"
+ *      = "[dD]efault   - default, automatic configuration.
+ *      = "[nN]ode      - order by node locality, then by zone within node
+ *      = "[zZ]one      - order by zone, then by locality within zone
+ */
+
+static int __parse_numa_zonelist_order(char *s)
+{
+    if (*s == 'd' || *s == 'D') {
+        user_zonelist_order = ZONELIST_ORDER_DEFAULT;
+    } else if (*s == 'n' || *s == 'N') {
+        user_zonelist_order = ZONELIST_ORDER_NODE;
+    } else if (*s == 'z' || *s == 'Z') {
+        user_zonelist_order = ZONELIST_ORDER_ZONE;
+    } else {
+        pr_warn("Ignoring invalid numa_zonelist_order value:  %s\n", s);
+        return -EINVAL;
+    }
+    return 0;
+}
+
+static __init int setup_numa_zonelist_order(char *s)
+{
+    int ret;
+
+    if (!s)
+        return 0;
+
+    ret = __parse_numa_zonelist_order(s);
+    if (ret == 0)
+        strlcpy(numa_zonelist_order, s, NUMA_ZONELIST_ORDER_LEN);
+
+    return ret;
+}
+early_param("numa_zonelist_order", setup_numa_zonelist_order);