On Wed, Sep 29, 2021 at 09:24:31PM +0200, Peter Zijlstra wrote: > On Wed, Sep 29, 2021 at 09:13:26PM +0200, Peter Zijlstra wrote: > > On Wed, Sep 29, 2021 at 11:37:01AM -0700, Paul E. McKenney wrote: > > > > > And what happens to all of this in !CONFIG_CONTEXT_TRACKING kernels? > > > Of course, RCU needs it unconditionally. (There appear to be at least > > > parts of it that are unconditionally available, but I figured that I > > > should ask. Especially given the !CONFIG_CONTEXT_TRACKING definition > > > of the __context_tracking_cpu_seq() function.) > > > > For !CONFIG_CONTEXT_TRACKING it goes *poof*. > > > > Since the thing was called dynticks, I presumed it was actually dynticks > > only, silly me (also, I didn't see any obvious !context_tracking usage > > of it, i'll go audit it more carefully. > > Oh argh, it does idle too... damn. And I don't suppose having 2 counters > is going to be nice :/ > > I'll go back to thinking about this. Glad I could help? For some definition of "help"? ;-) Thanx, Paul
