update schedule 09-tuning

study/driver/00-code/hello/hello.c

@@ -13,7 +13,10 @@ MODULE_DESCRIPTION("hello world");
 
 static int hello_init(void)
 {
-    return 0;
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule();
+
+	return 0;
 }
 
 

study/driver/00-code/hello/hello2.c

@@ -1,47 +0,0 @@
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-//#include <linux/list.h>
-//#include <linux/mm.h>
-//#include <linux/mm_types.h>
-
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_AUTHOR("Gatieme");
-MODULE_DESCRIPTION("hello world");
-
-/*
- * print the module information
- */
-static void print_module(void)
-{
-	struct module *mod;
-
-	printk(KERN_ALERT "this module: %p==%p\n", &__this_module, THIS_MODULE);
-	printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
-	printk(KERN_ALERT "module name: %s\n", THIS_MODULE->name);
-
-	list_for_each_entry(mod, *(&THIS_MODULE->list.prev), list);
-	printk(KERN_ALERT "module name: %s\n", mod->name);
-	printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
-}
-
-static int hello_init(void)
-{
-	print_module();
-
-	printk(KERN_ALERT "run in cpu %d\n", get_cpu());
-
-	printk(KERN_ALERT "PAGE_OFFSET : 0x%lx, TASK_SIZE : 0x%lx", PAGE_OFFSET,
-	       TASK_SIZE);
-
-	return 0;
-}
-
-static void hello_exit(void)
-{
-	printk(KERN_ERR "exit");
-}
-
-module_init(hello_init);
-module_exit(hello_exit);

study/driver/00-code/hello/hello2.c~

@@ -1,47 +0,0 @@
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-//#include <linux/list.h>
-//#include <linux/mm.h>
-//#include <linux/mm_types.h>
-
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_AUTHOR("Gatieme");
-MODULE_DESCRIPTION("hello world");
-
-/*
- * print the module information
- */
-static void print_module(void)
-{
-	struct module *mod;
-
-	printk(KERN_ALERT "this module: %p==%p\n", &__this_module, THIS_MODULE);
-	printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
-	printk(KERN_ALERT "module name: %s\n", THIS_MODULE->name);
-
-	list_for_each_entry(mod, *(&THIS_MODULE->list.prev), list);
-	printk(KERN_ALERT "module name: %s\n", mod->name);
-	printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
-}
-
-static int hello_init(void)
-{
-	print_module();
-
-	printk(KERN_ALERT "run in cpu %d\n", get_cpu());
-
-	printk(KERN_ALERT "PAGE_OFFSET : 0x%lx, TASK_SIZE : 0x%lx", PAGE_OFFSET,
-	       TASK_SIZE);
-
-	return 0;
-}
-
-static void hello_exit(void)
-{
-	printk(KERN_ERR "exit");
-}
-
-module_init(hello_init);
-module_exit(hello_exit);

study/kernel/01-process/00-code/scheduling_while_atomic/Makefile

@@ -0,0 +1,78 @@
+# ------------------------------------------------------------------------------
+#
+# Makefile for the LDD-LinuxDeviceDrivers.
+#
+# Author: gatieme
+# Create: 2016-07-29 15:50:46
+# Last modified: 2016-07-29 16:10:29
+# Description:
+# 	This program is loaded as a kernel(v2.6.18 or later) module.
+# 	Use "make install" to load it into kernel.
+# 	Use "make remove" to remove the module out of kernel.
+#
+# ------------------------------------------------------------------------------
+
+
+ROOT=..
+#PLATFORM=$(shell $(ROOT)/systype.sh)
+#include $(ROOT)/Make.defines.$(PLATFORM)
+
+#	my driver description
+DRIVER_VERSION := "1.0.0"
+DRIVER_AUTHOR  := "Gatieme @ AderStep Inc..."
+DRIVER_DESC    := "Linux input module for Elo MultiTouch(MT) devices"
+DRIVER_LICENSE := "Dual BSD/GPL"
+
+
+MODULE_NAME := hello
+
+ifneq ($(KERNELRELEASE),)
+
+#CFG_FLAGS += -O2  -I./
+#EXTRA_CFLAGS  += $(C_FLAGS) $(CFG_INC) $(CFG_INC)
+
+
+
+obj-m := $(MODULE_NAME).o #print_vmarea.o
+
+else
+
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+
+PWD := $(shell pwd)
+
+modules:
+	make -C $(KERNELDIR) M=$(PWD) modules
+
+modules_install:
+	make -C $(KERNELDIR) M=$(PWD) modules_install
+
+
+
+insmod:
+	sudo insmod $(MODULE_NAME).ko
+
+reinsmod:
+	sudo rmmod $(MODULE_NAME)
+	sudo insmod $(MODULE_NAME).ko
+
+github:
+	cd $(ROOT) && make github
+
+rmmod:
+	sudo rmmod $(MODULE_NAME)
+
+test :
+	sudo ../injector/memInjector -l stack -m random -t word_0 --time 1 --timeout 3 -p 1
+
+clean:
+	make -C $(KERNELDIR) M=$(PWD) clean
+	rm -f modules.order Module.symvers Module.markers
+
+.PHNOY:
+	modules modules_install clean
+
+
+
+endif
+

study/kernel/01-process/00-code/scheduling_while_atomic/hello.c

@@ -0,0 +1,42 @@
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+#include <linux/irq_work.h>
+
+DEFINE_SPINLOCK(lock);
+
+static void scheduling(struct irq_work *work)
+{
+	schedule();
+}
+
+
+DEFINE_IRQ_WORK(irq_work, scheduling);
+static int __init hello_init(void)
+{
+	irq_work_queue(&irq_work);
+
+	return 0;
+}
+
+module_init(hello_init);
+
+static void __exit hello_exit(void)
+{
+}
+
+module_exit(hello_exit);
+
+/*  Driver Information  */
+#define DRIVER_VERSION  "1.0.0"
+#define DRIVER_AUTHOR   "Gatieme @ AderStep Inc..."
+#define DRIVER_DESC     "Linux input module for Elo MultiTouch(MT) devices"
+#define DRIVER_LICENSE  "Dual BSD/GPL"
+
+/*  Kernel Module Information   */
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);