Messages in this thread | | | Date | Mon, 11 Jul 2011 18:03:32 +0200 | From | Frederic Weisbecker <> | Subject | Re: [PATCH tip/core/rcu 0/6] Check for use of RCU from dyntick-idle mode |
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On Fri, Jul 08, 2011 at 08:43:31AM -0700, Paul E. McKenney wrote: > Hello! > > This set of patches adds checks for use of RCU from "extended quiescent > states" such as dyntick-idle mode. Such use is grossly illegal because > RCU by definition ignores CPUs that are in extended quiescent states. > In the case of dyntick-idle mode, the only way for RCU to avoid ignoring > such CPUs would be to wake them up periodically, which would defeat the > whole purpose of dyntick-idle mode. > > The good news is that Frederic got this effort started. The bad news is > that there are several cases where RCU read-side critical sections appear > in dyntick-idle mode.
Ok, let me send to you the patch that splits up rcu/tickless logic and I'll try to fix up what you reported to me in ppc.
BTW, are you aware of other cases? You mentioned "several" :)
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