Messages in this thread | | | Date | Tue, 15 Nov 2016 15:55:36 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH RFC tip/core/rcu] SRCU rewrite |
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On Tue, Nov 15, 2016 at 06:26:27AM -0800, Paul E. McKenney wrote: > On Tue, Nov 15, 2016 at 02:59:12PM +0100, Peter Zijlstra wrote:
> > The smp_mb()s in read_{un,}lock() and the lock in call_srcu() come to > > mind. > > There is some possibility of weakening the srcu_read_unlock() ordering, > but one step at a time. > > Has the lock in call_srcu() been causing trouble? Easy to fix if so, > but as you noted in another email today, we don't need complexity for > complexity's sake. And no reports of problems with this have reached > me thus far.
It was a cause for concern in the optimistic fault series, but since that never got sorted, it hasn't shown up in practise afaik.
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