更新了内存管理之内存描述(二)--内存结点pg_data_t详解...

Makefile

@@ -6,7 +6,7 @@ GITHUB_COMMIT := $(COMMIT)
 
 
 ifeq ($(COMMIT), )
-	GITHUB_COMMIT="更新了内存管理之内存描述(四)--页帧struct page详解..."
+	GITHUB_COMMIT="更新了内存管理之内存描述(二)--内存结点pg_data_t详解..."
 endif
 
 

study/kernel/02-memory/01-description/02-node/.print_node.ko.cmd

@@ -0,0 +1 @@
+cmd_/home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/02-memory/01-description/02-node/print_node.ko := ld -r -m elf_x86_64 -T ./scripts/module-common.lds --build-id  -o /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/02-memory/01-description/02-node/print_node.ko /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/02-memory/01-description/02-node/print_node.o /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/02-memory/01-description/02-node/print_node.mod.o

study/kernel/02-memory/01-description/02-node/modules.order

@@ -0,0 +1 @@
+kernel//home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/02-memory/01-description/02-node/print_node.ko

study/kernel/02-memory/01-description/02-node/print_node.c

@@ -11,6 +11,19 @@
 
 MODULE_LICENSE("GPL");
 
+void print_node(struct pglist_data   *node)
+{
+    printk("address = %p\n", node);
+    printk("node id = %d\n", node->node_id);
+    printk("nr_zones = %d\n", node->nr_zones);
+    printk("pgdat_next = %p\n", node->pgdat_next);
+
+    printk("nod present pages = %d\n", node->node_present_pages);
+    printk("nod spanned pages = %d\n", node->node_spanned_pages);
+}
+
+
+
 extern pg_data_t    *pgdat_list[MAX_NUMNODES];
 static int __init print_node_setup(void)
 {
@@ -18,9 +31,10 @@ static int __init print_node_setup(void)
     printk(KERN_INFO "PAGE_OFFSET = 0x%lx\n",
             PAGE_OFFSET);
 
-    /*
+
     int         i;
-    pg_data_t   *pgdat = NULL;
+    pg_data_t   *node = NULL;
+#if 0
     pg_data_t   **pgdata_list = pgdat_list;
     void        *high_memory = NULL;
 
@@ -28,17 +42,40 @@ static int __init print_node_setup(void)
     {
         printk(KERN_INFO "%p\n", (void *)pgdata_list[i]);
     }
-
     for_each_online_pgdat(pgdat)
     {
         high_memory = max_t(void *, high_memory, __va(pgdat_end_pfn(pgdat) << PAGE_SHIFT));
         printk(KERN_INFO "%p\n", high_memory);
         printk(KERN_INFO "");
     }
-    */
+#endif
+
+#ifndef CONFIG_NEED_MULTIPLE_NODES
+    struct pglist_data *pgdata = &contig_page_data;
+    printk("%d\n", pgdata->node_id);
+#else
+    printk("NODES_SHIFT = %d, MAX_NUMNODES = %d\n", NODES_SHIFT, MAX_NUMNODES);
+    for(i = 0; i < MAX_NUMNODES; i++)
+    {
+        node = NODE_DATA(i);
+        if(node != NULL)
+        {
+            print_node(node);
+        }
+        else
+        {
+            break;
+        }
+    }
+
+
     return 0;
+#endif
 }
 
+
+
+
 static void __exit print_node_cleanup(void)
 {
     printk(KERN_INFO"Goodbye!\n");

study/kernel/02-memory/01-description/02-node/print_node.mod.c

@@ -0,0 +1,32 @@
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+
+__visible struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+	.name = KBUILD_MODNAME,
+	.init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+	.exit = cleanup_module,
+#endif
+	.arch = MODULE_ARCH_INIT,
+};
+
+static const struct modversion_info ____versions[]
+__used
+__attribute__((section("__versions"))) = {
+	{ 0xcd71858e, __VMLINUX_SYMBOL_STR(module_layout) },
+	{ 0xe462e7ca, __VMLINUX_SYMBOL_STR(node_data) },
+	{ 0x27e1a049, __VMLINUX_SYMBOL_STR(printk) },
+	{ 0xbdfb6dbb, __VMLINUX_SYMBOL_STR(__fentry__) },
+};
+
+static const char __module_depends[]
+__used
+__attribute__((section(".modinfo"))) =
+"depends=";
+
+
+MODULE_INFO(srcversion, "AC263D03D5E0B3B80B01AB6");