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.
