diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..339b4be
--- /dev/null
+++ b/.DS_Store
Binary files differ
diff --git a/buddy_test/Makefile b/buddy_test/Makefile
new file mode 100644
index 0000000..13351bb
--- /dev/null
+++ b/buddy_test/Makefile
@@ -0,0 +1,6 @@
+KDIR=/lib/modules/$(shell uname -r)/build
+obj-m += buddy_test.o
+all:
+	make -C $(KDIR) M=$(PWD) modules
+clean:
+	make -C $(KDIR) M=$(PWD) clean
diff --git a/buddy_test/buddy_test.c b/buddy_test/buddy_test.c
new file mode 100644
index 0000000..3a23234
--- /dev/null
+++ b/buddy_test/buddy_test.c
@@ -0,0 +1,21 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+static struct page *page;
+static unsigned int order = 10;
+ 
+static int __init buddy_test_init(void) {
+	unsigned int flags = 0;
+	flags |= __GFP_DMA32;
+  	page = alloc_pages(flags, order);
+  	return 0;
+}
+static void __exit buddy_test_exit(void) {
+	__free_pages(page, order);
+}
+module_init(buddy_test_init);
+module_exit(buddy_test_exit);
+MODULE_AUTHOR("SUEYASU Taizo");
+MODULE_DESCRIPTION("Buddy System test driver");
+MODULE_LICENSE("GPL");
diff --git a/pagetable/Makefile b/pagetable/Makefile
new file mode 100644
index 0000000..c935c03
--- /dev/null
+++ b/pagetable/Makefile
@@ -0,0 +1,6 @@
+KDIR=/lib/modules/$(shell uname -r)/build
+obj-m += pagetable.o
+all:
+	make -C $(KDIR) M=$(PWD) modules
+clean:
+	make -C $(KDIR) M=$(PWD) clean
diff --git a/pagetable/pagetable.c b/pagetable/pagetable.c
new file mode 100644
index 0000000..1d514a0
--- /dev/null
+++ b/pagetable/pagetable.c
@@ -0,0 +1,64 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <asm/pgtable.h>
+
+static unsigned int processid = 1;
+module_param(processid, uint, 0);
+static unsigned long addr = 0;
+module_param(addr, ulong, 0);
+
+static unsigned long get_pfndata(unsigned long entry) {
+	entry &= 0x000FFFFFFFFFF000;
+	return(entry >>= 12);
+}
+
+static int __init pagetable_init(void) {
+	pgd_t *pgd;
+	p4d_t *p4d;
+	pud_t *pud;
+	pmd_t *pmd;
+	pte_t *pte;
+	unsigned long paddr;
+	struct pid *pid = find_get_pid(processid);
+	struct task_struct *task = pid_task(pid, PIDTYPE_PID);
+	struct mm_struct *mm = task->mm;
+	if (pid == NULL) return 0;
+
+	printk("mm->pgd   = %016lx\n", (unsigned long)mm->pgd);
+	printk("CR3       = %010lx\n", get_pfndata(__pa(mm->pgd)));
+	pgd = pgd_offset(mm, addr);
+	if (pgd_none(*pgd) || pgd_bad(*pgd)) return 0;
+	printk("PGD entry = %010lx\n", get_pfndata(pgd_val(*pgd)));
+
+	p4d = p4d_offset(pgd, addr);
+	if (p4d_none(*p4d) || p4d_bad(*p4d)) return 0;
+	printk("P4D entry = %010lx\n", get_pfndata(p4d_val(*p4d)));
+	
+	pud = pud_offset(p4d, addr);
+	if (pud_none(*pud) || pud_bad(*pud)) return 0;
+	printk("PUD entry = %010lx\n", get_pfndata(pud_val(*pud)));
+
+	pmd = pmd_offset(pud, addr);
+	if (pmd_none(*pmd) || pmd_bad(*pmd)) return 0;
+	printk("PMD entry = %010lx\n", get_pfndata(pmd_val(*pmd)));
+
+	pte = pte_offset_map(pmd, addr);
+	if (pte_none(*pte)) return 0;
+	paddr = pte_val(*pte);
+	printk("PTE entry = %010lx\n", get_pfndata(paddr));
+	paddr = (paddr & 0x000FFFFFFFFFF000) | (addr & 0xFFF);
+	printk("Phys addr = %016lx\n", paddr);
+	
+  	return 0;
+}
+static void __exit pagetable_exit(void) {
+}
+module_init(pagetable_init);
+module_exit(pagetable_exit);
+MODULE_AUTHOR("SUEYASU Taizo");
+MODULE_DESCRIPTION("pagetable test driver");
+MODULE_LICENSE("GPL");
+MODULE_PARM_DESC(processid, "PID (0 < processid < 2^22, default=1)");
+MODULE_PARM_DESC(addr, "Virtual address, default=0");
diff --git a/slab_test/Makefile b/slab_test/Makefile
new file mode 100644
index 0000000..6a0757a
--- /dev/null
+++ b/slab_test/Makefile
@@ -0,0 +1,6 @@
+KDIR=/lib/modules/$(shell uname -r)/build
+obj-m += slab_test.o
+all:
+	make -C $(KDIR) M=$(PWD) modules
+clean:
+	make -C $(KDIR) M=$(PWD) clean
diff --git a/slab_test/slab_test.c b/slab_test/slab_test.c
new file mode 100644
index 0000000..864bb6c
--- /dev/null
+++ b/slab_test/slab_test.c
@@ -0,0 +1,24 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+static struct kmem_cache *slab_cache;
+static void *data;
+static size_t data_size = 456;
+
+static int __init slab_test_init(void) {
+	slab_cache = kmem_cache_create("test_slab_cache",
+				 data_size, 0, 0, NULL);
+	data = kmem_cache_alloc(slab_cache, 0);
+  	return 0;
+}
+static void __exit slab_test_exit(void) {
+	kmem_cache_free(slab_cache, data);
+	kmem_cache_destroy(slab_cache);
+}
+module_init(slab_test_init);
+module_exit(slab_test_exit);
+MODULE_AUTHOR("SUEYASU Taizo");
+MODULE_DESCRIPTION("Slab test driver");
+MODULE_LICENSE("GPL");