On Thu 2022-02-24 10:40 -0300, Marcelo Tosatti wrote: > On Thu, Feb 24, 2022 at 01:28:16PM +0000, Aaron Tomlin wrote: > > On Thu 2022-02-24 10:14 -0300, Marcelo Tosatti wrote: > > > If the per-CPU vmstat_update is limited to happen once per second, that > > > shouldnt be a significant performance impact? > > > > Perhaps not. Albeit, is the interrupt worth it? > > Its a requirement for correctness right? Yes, this is true. > > Then again it could indeed > > be a long time before the idle task is selected and a return to idle code > > were we'd check for any remaining differentials with the aforementioned > > patch. > > Or a long time before userspace returns to kernel. Indeed. I'll put together a patch for comment. Kind regards, -- Aaron Tomlin
