On 18 February 2013 16:30, Steven Rostedt [off-list ref] wrote:

On Mon, 2013-02-18 at 11:58 +0100, Vincent Guittot wrote:

quoted

My tests have been done without cpuidle because i have some issues
with function tracer and cpuidle

But the cpu hotplug and cpuidle work well when I run the tests without
enabling the function tracer

I know suspend and resume has issues with function tracing (because it
makes things like calling smp_processor_id() crash the system), but I'm
unaware of issues with hotplug itself. Could be some of the same issues.

Can you give me more details, I'll try to investigate it.

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

Vincent

Thanks,

-- Steve