stable/11 debugging kernel unable to produce crashdump

[Eugene Grosbein]

> I suspect that this is because we only stop the scheduler upon a panic
> if SMP is configured. Can you retest with the patch below applied?
> 
> Index: sys/kern/kern_shutdown.c
> ===================================================================
> --- sys/kern/kern_shutdown.c	(revision 312082)
> +++ sys/kern/kern_shutdown.c	(working copy)
> @@ -713,6 +713,7 @@
>  		CPU_CLR(PCPU_GET(cpuid), &other_cpus);
>  		stop_cpus_hard(other_cpus);
>  	}
> +#endif
>  
>  	/*
>  	 * Ensure that the scheduler is stopped while panicking, even if panic
> @@ -719,7 +720,6 @@
>  	 * has been entered from kdb.
>  	 */
>  	td->td_stopsched = 1;
> -#endif
>  
>  	bootopt = RB_AUTOBOOT;
>  	newpanic = 0;
> 
> 

Indeed, my router is uniprocessor system and your patch really solves the problem.
Now kernel generates crashdump just fine in case of panic. Please commit the fix, thanks!

Eugene Grosbein