update

study/debug/tools/perf/kernel_modules/Makefile

@@ -0,0 +1,14 @@
+
+
+obj-m := test_kthread_run.o
+
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNELDIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNELDIR) M=$(PWD) clean
+

study/debug/tools/perf/kernel_modules/test_kthread_run.c

@@ -0,0 +1,59 @@
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <linux/kthread.h>
+
+#include <linux/delay.h>  // error: implicit declaration of function ‘msleep’
+
+
+static struct task_struct *ptask;
+
+static int thread_function(void *data)
+{
+	int time_count = 0;
+	do
+	{
+		printk(KERN_INFO "thread_function: %d times", ++time_count);
+		msleep(1000);
+	}while(!kthread_should_stop()
+		&& time_count<=30);
+
+	return time_count;
+}
+
+static int test_kthread_run_init(void)
+{
+	int cpu = 1;
+
+	printk(KERN_INFO "test_kthread_run, world!\n");
+
+	ptask = kthread_run(thread_function, NULL, "mythread%d", cpu);
+	kthread_bind(ptask, cpu);
+
+	if (IS_ERR(ptask))
+	{
+		printk(KERN_INFO "create kthread failed!\n");
+	}
+	else
+	{
+		printk(KERN_INFO "create ktrhead ok!\n");
+	}
+
+	return 0;
+}
+
+static void test_kthread_run_exit(void)
+{
+	printk(KERN_INFO "test_kthread_run, exit!\n");
+
+	if (!IS_ERR(ptask))
+	{
+		int ret = kthread_stop(ptask);
+		printk(KERN_INFO "thread function has run %ds\n", ret);
+	}
+}
+
+module_exit(test_kthread_run_exit);
+module_init(test_kthread_run_init);
+MODULE_LICENSE("Dual BSD/GPL");
+