* Dave Jones <[email protected]> wrote:

> I was puzzled why /proc/$$/stack had disappeared, until I figured out
> I had disabled the last debug option that did a 'select STACKTRACE'.
> This patch makes the option show up at config time, so it can be
> enabled without enabling any of the more heavyweight debug options.
> 
> Signed-off-by: Dave Jones <[email protected]>
> 
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 7a638aa3545b..96c64beac12a 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1008,8 +1008,13 @@ config TRACE_IRQFLAGS
>         either tracing or lock debugging.
>  
>  config STACKTRACE
> -     bool
> +     bool "Stack backtrace support"
>       depends on STACKTRACE_SUPPORT
> +     help
> +       This option causes the kernel to create a /proc/pid/stack for
> +       every process, showing its current stack trace.
> +       It is also used by various kernel debugging features that require
> +       stack trace generation.
>  
>  config DEBUG_KOBJECT
>       bool "kobject debugging"

Acked-by: Ingo Molnar <[email protected]>

Thanks,

        Ingo
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