search for: 7e0207f

...disables PIO waits, but drags in CPU-bound pv-ops. Thus - you will probably get more speed loss than speedup using this option. - - If in doubt, say N. - config KVM_MMU bool "KVM PV MMU support" depends on KVM_GUEST diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 7e0207f..be182e6 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -29,15 +29,6 @@ #include <linux/hardirq.h> #include <asm/timer.h> -#ifdef CONFIG_KVM_IODELAY -/* - * No need for any "IO delay" on KVM - */ -static void kvm_io_delay(void) -{ -} -#endif /* CONFIG_K...

...disables PIO waits, but drags in CPU-bound pv-ops. Thus - you will probably get more speed loss than speedup using this option. - - If in doubt, say N. - config KVM_MMU bool "KVM PV MMU support" depends on KVM_GUEST diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 7e0207f..be182e6 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -29,15 +29,6 @@ #include <linux/hardirq.h> #include <asm/timer.h> -#ifdef CONFIG_KVM_IODELAY -/* - * No need for any "IO delay" on KVM - */ -static void kvm_io_delay(void) -{ -} -#endif /* CONFIG_K...

Paravirt ops is currently only capable of either replacing a lot of Linux internal code or none at all. The are users that don't need all of the possibilities pv-ops delivers though. On KVM for example we're perfectly fine not using the PV MMU, thus not touching any MMU code. That way we don't have to improve pv-ops to become fast, we just don't compile the MMU parts in! This

Paravirt ops is currently only capable of either replacing a lot of Linux internal code or none at all. The are users that don't need all of the possibilities pv-ops delivers though. On KVM for example we're perfectly fine not using the PV MMU, thus not touching any MMU code. That way we don't have to improve pv-ops to become fast, we just don't compile the MMU parts in! This