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    SubjectRe: [GIT PULL] RCU changes for v3.3
    On Tue, Jan 24, 2012 at 06:04:17PM +0100, Frederic Weisbecker wrote:
    > On Tue, Jan 24, 2012 at 08:53:13AM -0800, Paul E. McKenney wrote:
    > > 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?
    >
    > perf_trace_power() is automatically generated by include/trace/ftrace.h
    > This is a tracepoint handler so we don't need to worry about it. The problem
    > is the call to the tracepoint itself.

    Agreed. I was just naively expecting "git grep perf_trace_power" to show
    me the call points. :-(

    Thanx, Paul

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