Messages in this thread | | | Date | Tue, 27 Mar 2012 09:39:03 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH RFC] rcu: Make __rcu_read_lock() inlinable |
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On Tue, Mar 27, 2012 at 08:26:07AM -0400, Steven Rostedt wrote: > On Mon, 2012-03-26 at 22:15 -0700, Paul E. McKenney wrote: > > > Hmmm... I am not yet sure whether it is easier to make RCU use legal > > in switch_to() or to detect it. I am inclined to take whatever course > > is easiest, which is likely to make it legal. :-/ > > We could just declare that we do not allow tracepoints in arch specific > "switch_to" code. Then you shouldn't need to worry about RCU in > switch_to().
Heh. I expect that to work about as well as the earlier declaration that RCU not be used in the idle loop. ;-)
> sched_rcu can still work there correct? That is, a synchronize_sched() > should not be affected. As that is needed for the function tracing, and > that may be called within a switch_to.
Yep, good point.
Thanx, Paul
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