On Tue, 7 Feb 2017, John Stultz wrote: > 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? I think we should just kill it. No tools can really rely on the behaviour of that file because it depends on CONFIG_TIMER_STATS and the information available there is just a random snapshot of queued timers at a given point of time, which is in no way usefull. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
