[PATCH][v3] hung_task: Panic after fixed number of hung tasks

[Randy Dunlap]

Hi--

On 10/12/25 4:50 AM, lirongqing wrote:
> From: Li RongQing <lirongqing at baidu.com>
> 

> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index a51ab46..7d9a8ee 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -1992,14 +1992,20 @@
>  			the added memory block itself do not be affected.
>  
>  	hung_task_panic=
> -			[KNL] Should the hung task detector generate panics.
> -			Format: 0 | 1
> +			[KNL] Number of hung tasks to trigger kernel panic.
> +			Format: <int>
> +
> +			Set this to the number of hung tasks that must be
> +			detected before triggering a kernel panic.
> +
> +			0: don't panic
> +			1: panic immediately on first hung task
> +			N: panic after N hung tasks are detect

			                            are detected

>  
> -			A value of 1 instructs the kernel to panic when a
> -			hung task is detected. The default value is controlled
> -			by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time
> -			option. The value selected by this boot parameter can
> -			be changed later by the kernel.hung_task_panic sysctl.
> +			The default value is controlled by the
> +			CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time option. The value
> +			selected by this boot parameter can be changed later by the
> +			kernel.hung_task_panic sysctl.
>  
>  	hvc_iucv=	[S390]	Number of z/VM IUCV hypervisor console (HVC)
>  				terminal devices. Valid values: 0..8


-- 
~Randy