Messages in this thread Patch in this message | | | Date | Tue, 29 Aug 2017 16:39:09 +0200 | From | Borislav Petkov <> | Subject | Re: [RFC PATCH v2 3/7] sched/idle: Add poll before enter real idle path |
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On Tue, Aug 29, 2017 at 11:46:37AM +0000, Yang Zhang wrote: > Add poll in do_idle. For UP VM, if there are running task, it will not > goes into idle path, so we only enable poll in SMP VM. > > Signed-off-by: Yang Zhang <yang.zhang.wz@gmail.com> > Signed-off-by: Quan Xu <quan.xu0@gmail.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Ingo Molnar <mingo@redhat.com> > Cc: "H. Peter Anvin" <hpa@zytor.com> > Cc: x86@kernel.org > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Borislav Petkov <bp@alien8.de> > Cc: Kyle Huey <me@kylehuey.com> > Cc: Andy Lutomirski <luto@kernel.org> > Cc: Len Brown <len.brown@intel.com> > Cc: linux-kernel@vger.kernel.org > --- > arch/x86/kernel/process.c | 7 +++++++ > kernel/sched/idle.c | 2 ++ > 2 files changed, 9 insertions(+) > > diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c > index 3ca1980..def4113 100644 > --- a/arch/x86/kernel/process.c > +++ b/arch/x86/kernel/process.c > @@ -332,6 +332,13 @@ void arch_cpu_idle(void) > x86_idle(); > } > > +#if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT) > +void arch_cpu_idle_poll(void) > +{ > + paravirt_idle_poll(); > +} > +#endif
So this will get called on any system which has CONFIG_PARAVIRT enabled *even* if they're not running any guests.
Huh?
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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