Description of problem:
watchdog_thresh设置为60时，需要200秒以上才触发softlockup

Version-Release number of selected component (if applicable):

Linux localhost.localdomain 5.10.134-18.an8.x86_64 #1 SMP Fri Dec 13 16:32:58 CST 2024 x86_64 x86_64 x86_64 GNU/Linux

How reproducible:

Steps to Reproduce:
1.echo 1 > /proc/sys/kernel/watchdog
2.echo 60 > /proc/sys/kernel/watchdog_thresh
3.echo 1 > /proc/sys/kernel/softlockup_panic
4.注入内核态死循环故障

Actual results:

200秒以上触发soft lockup
Expected results:
120秒左右触发softlockup复位

Additional info:

故障注入代码：
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/cpumask.h>
#include <linux/timekeeping.h>

static struct task_struct *my_thread;

static int cpu_id;

static int delay_time;

module_param(cpu_id, int ,0644);

module_param(delay_time, int ,0644);

static int my_thread_fn(void *data)
{
    ktime_t start, end;
    s64 elapsed_ns;

    pr_info("[my_thread] running on CPU %d\n", smp_processor_id());

    while (!kthread_should_stop())
    {
    }

    return 0;
}

static int __init my_module_init(void)
{
    pr_info("[my_module] init\n");

    my_thread = kthread_create(my_thread_fn, NULL, "my_kthread");
    if (IS_ERR(my_thread)) {
        pr_err("[my_module] Failed to create kthread\n");
        return PTR_ERR(my_thread);
    }
    wake_up_process(my_thread);

    return 0;
}

static void __exit my_module_exit(void)
{
    pr_info("[my_module] exit\n");

    if (my_thread)
        kthread_stop(my_thread);
}

module_init(my_module_init);
module_exit(my_module_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("ChatGPT");
MODULE_DESCRIPTION("cpu loop update demo with timing");