Re: [PATCH] time: Remove CONFIG_TIMER_STATS

[John Stultz]

On Tue, Feb 7, 2017 at 3:40 PM, Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> Currently CONFIG_TIMER_STATS exposes process information across namespaces:
>
> kernel/time/timer_list.c print_timer():
>
>         SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
>
> /proc/timer_list:
>
>  #11: <0000000000000000>, hrtimer_wakeup, S:01, do_nanosleep, cron/2570
>
> Given that the tracer can give the same information, this patch entirely
> removes CONFIG_TIMER_STATS.
>
> Suggested-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>

I don't have an issue with this, but I worry this would break some
tooling out there. Should it be marked as deprecated first?

Or maybe just pulling the band-aid off is the best way?

thanks
-john