Hello Frederic. On Sat, Feb 04, 2023 at 12:24:08AM +0100, Frederic Weisbecker <frederic@xxxxxxxxxx> wrote: > The individual isolation features turned on by nohz_full were initially > split in order for each of them to be tunable through cpusets. However > plans have changed in favour of an interface (be it cpusets or sysctl) > grouping all these features to be turned on/off altogether. > Then should the need ever arise, the interface can still be expanded > to handle the individual isolation features. > > Therefore the current isolation split between tick/timer/workqueue/rcu/ > kthreads/misc doesn't make sense anymore. Why it doesn't make sense? I think it's a useful annotation of respective operations wrt CPU isolation. The grouping you did into HK_TYPE_KERNEL_NOISE (or even coarser) should IMO be done at the place where it'll be exposed into the favored interface (like it's with nohz_full=). Thanks, Michal
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