Messages in this thread | | | Subject | Re: [GIT PULL] RCU changes for v3.3 | From | Eric Dumazet <> | Date | Tue, 24 Jan 2012 18:13:28 +0100 |
| |
Le mardi 24 janvier 2012 à 08:53 -0800, Paul E. McKenney a écrit : > On Tue, Jan 24, 2012 at 05:25:12PM +0100, Eric Dumazet wrote: > > Le jeudi 05 janvier 2012 à 14:54 +0100, Ingo Molnar a écrit : > > > Linus, > > > > > > Please pull the latest core-rcu-for-linus git tree from: > > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-rcu-for-linus > > > > > > Thanks, > > > > Hi guys > > > > New lockdep warning here : > > Hmmm... Looks like tracing from within the inner idle loop. > > Because RCU ignores CPUs in the inner idle loop (after the call to > rcu_idle_enter()), RCU read-side critical sections are not legal there. > > One approach would be to delay the call to rcu_idle_enter() until after > the tracing is done, and to ensure that the call to rcu_idle_exit() happens > before any tracing. I am not seeing perf_trace_power(), so need to > update and look again. Or are you looking at -next rather than mainline? >
I am using mainline, not -next
It seems "powertop" triggers the warnings.
Check include/trace/events/power.h line 75 :
DECLARE_EVENT_CLASS(power,
This declares perf_trace_power()...
include/trace/ftrace.h line 718
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ static notrace void \ perf_trace_##call(void *__data, proto) ...
Thanks
-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |