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...@gmail.com> > Signed-off-by: Quan Xu <quan....@gmail.com> > Cc: Thomas Gleixner <t...@linutronix.de> > Cc: Ingo Molnar <mi...@redhat.com> > Cc: "H. Peter Anvin" <h...@zytor.com> > Cc: x...@kernel.org > Cc: Peter Zijlstra <pet...@infradead.org> > Cc: Borislav Petkov <b...@alien8.de> > Cc: Kyle Huey <m...@kylehuey.com> > Cc: Andy Lutomirski <l...@kernel.org> > Cc: Len Brown <len.br...@intel.com> > Cc: linux-ker...@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. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html