On Fri, Feb 26, 2021 at 10:12:05AM -0800, Paul E. McKenney wrote: > On Fri, Feb 26, 2021 at 05:38:44PM +0100, Peter Zijlstra wrote: > > > > I hate all of this, but if this will finally catch the actual problem, > > we can then revert all this, so sure. > > OK, I will bite... What exactly do you hate about it? It's ugly and messy. We're basically commiting a debug session. Normally gunk like this is done in private trees, then we find the problem and fix that and crap like this never sees the light of day.