Messages in this thread | | | Date | Thu, 22 Sep 2016 15:58:03 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH] clocksource/drivers/ti-32k: Prevent ftrace recursion |
| |
On Thu, 22 Sep 2016, Jisheng Zhang wrote:
> Currently ti-32k can be used as a scheduler clock. We properly marked > omap_32k_read_sched_clock() as notrace but we then call another > function ti_32k_read_cycles() that _wasn't_ notrace. > > Having a traceable function in the sched_clock() path leads to a > recursion within ftrace and a kernel crash.
Kernel crash? Doesn't ftrace core prevent recursion?
Thanks,
tglx
| |