Linux 把进程为D(不可中断进程)转换成其他状态

#include <linux/init.h>
#include <linux/kernel.h> /*Needed by all modules*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/sched/signal.h> //for_each_process
MODULE_LICENSE("BSD");
static int pid = -1;
module_param(pid, int, S_IRUGO);
static int killd_init(void)
{
    struct task_struct * p;
    printk(KERN_ALERT "killd: force D status process to death/n");
    printk(KERN_ALERT "killd: pid=%d/n", pid);
    //read_lock(&tasklist_lock);
    for_each_process(p){
        if(p->pid == pid){
            printk("killd: found/n");
            set_current_state(p);
            printk(KERN_ALERT "killd: aha, dead already/n");
            return 0;
        }
    }
    printk("not found");
    //read_unlock(&tasklist_lock);
    return 0;
}
static void killd_exit(void)
{
    printk(KERN_ALERT "killd: bye/n");
}
module_init(killd_init);
module_exit(killd_exit);

• 1.
• 2.
• 3.
• 4.
• 5.
• 6.
• 7.
• 8.
• 9.
• 10.
• 11.
• 12.
• 13.
• 14.
• 15.
• 16.
• 17.
• 18.
• 19.
• 20.
• 21.
• 22.
• 23.
• 24.
• 25.
• 26.
• 27.
• 28.
• 29.
• 30.
• 31.
• 32.

obj-m := killd.o
all :
        $(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules 
 
clean:
        $(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

• 1.
• 2.
• 3.
• 4.
• 5.
• 6.

[root@603a08208-9-cebase01 ~]# make -C /usr/src/kernels/4.18.0-30503.10.2.el8.aarch64/ M=`pwd` modules
make: Entering directory '/usr/src/kernels/4.18.0-30503.10.2.el8.aarch64'
  CC [M]  /root/killd.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /root/killd.mod.o
  LD [M]  /root/killd.ko
make: Leaving directory '/usr/src/kernels/4.18.0-30503.10.2.el8.aarch64'

• 1.
• 2.
• 3.
• 4.
• 5.
• 6.
• 7.
• 8.

sudo insmod ./killd.ko pid=1234

• 1.