Messages in this thread | | | Subject | Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug | From | Steven Rostedt <> | Date | Mon, 18 Feb 2013 14:53:15 -0500 |
| |
On Mon, 2013-02-18 at 17:50 +0100, Vincent Guittot wrote:
> yes for sure. > The problem is more linked to cpuidle and function tracer. > > cpu hotplug and function tracer work when cpuidle is disable. > cpu hotplug and cpuidle works if i don't enable function tracer. > my platform is dead as soon as I enable function tracer if cpuidle is > enabled. It looks like some notrace are missing in my platform driver > but we haven't completely fix the issue yet >
You can bisect to find out exactly what function is the problem:
cat /debug/tracing/available_filter_functions > t f(t) { num=`wc -l t` sed -ne "1,${num}p" t > t1 let num=num+1 sed -ne "${num},$p" t > t2
cat t1 > /debug/tracing/set_ftrace_filter # note this may take a long time to finish
echo function > /debug/tracing/current_tracer
<failed? bisect f(t1), if not bisect f(t2)> }
| |