Hi Cheng, On Fri, Mar 3, 2023 at 10:35 AM Cheng-Jui Wang <cheng-jui.wang@xxxxxxxxxxxx> wrote: > From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > commit e038f7b8028a1d1bc8ac82351c71ea538f19a879 upstream. > > Doing RCU-idle outside the driver, only to then temporarily enable it > again, at least twice, before going idle is suboptimal. > > Notably once implicitly through the cpu_pm_*() calls and once > explicitly doing ct_irq_*_irqon(). > > Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> > Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> > Tested-by: Kajetan Puchalski <kajetan.puchalski@xxxxxxx> > Tested-by: Tony Lindgren <tony@xxxxxxxxxxx> > Tested-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > Reviewed-by: Frederic Weisbecker <frederic@xxxxxxxxxx> > Reviewed-by: Guo Ren <guoren@xxxxxxxxxx> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > Link: https://lore.kernel.org/r/20230112195539.760296658@xxxxxxxxxxxxx > Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx> > Signed-off-by: Cheng-Jui Wang <cheng-jui.wang@xxxxxxxxxxxx> Given this patch introduced a so far unresolved regression upstream, I think it's premature to backport this to stable. https://lore.kernel.org/all/ff338b9f-4ab0-741b-26ea-7b7351da156@xxxxxxxxxxxxxx Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
