| Date | Wed, 19 Apr 2017 06:02:45 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH v2 tip/core/rcu 0/13] Miscellaneous fixes for 4.12 |
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On Wed, Apr 19, 2017 at 01:28:45PM +0200, Peter Zijlstra wrote: > > So the thing Maz complained about is because KVM assumes > synchronize_srcu() is 'free' when there is no srcu_read_lock() activity. > This series 'breaks' that. > > I've not looked hard enough at the new SRCU to see if its possible to > re-instate that feature.
And with the fix I gave Maz, the parallelized version is near enough to being free as well. It was just a stupid bug on my part: I forgot to check for expedited when scheduling callbacks.
Thanx, Paul
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