Re: [Xen-devel] [PATCH RFC V9 19/19] kvm hypervisor: Add directed yield in vcpu block path

[Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>]

On 06/03/2013 09:35 PM, Konrad Rzeszutek Wilk wrote:
> On Sun, Jun 02, 2013 at 12:56:45AM +0530, Raghavendra K T wrote:
> > kvm hypervisor: Add directed yield in vcpu block path
> >
> > From: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
> >
> > We use the improved PLE handler logic in vcpu block patch for
> > scheduling rather than plain schedule, so that we can make
> > intelligent decisions
> You are missing '.' there, and
Yep.

> > Signed-off-by: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
> > ---
> >   arch/ia64/include/asm/kvm_host.h    |    5 +++++
> >   arch/powerpc/include/asm/kvm_host.h |    5 +++++
> >   arch/s390/include/asm/kvm_host.h    |    5 +++++
> >   arch/x86/include/asm/kvm_host.h     |    2 +-
> >   arch/x86/kvm/x86.c                  |    8 ++++++++
> >   include/linux/kvm_host.h            |    2 +-
> >   virt/kvm/kvm_main.c                 |    6 ++++--
> >   7 files changed, 29 insertions(+), 4 deletions(-)
> >
> > diff --git a/arch/ia64/include/asm/kvm_host.h b/arch/ia64/include/asm/kvm_host.h
> > index 989dd3f..999ab15 100644
> > --- a/arch/ia64/include/asm/kvm_host.h
> > +++ b/arch/ia64/include/asm/kvm_host.h
> > @@ -595,6 +595,11 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu);
> >   int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
> >   void kvm_sal_emul(struct kvm_vcpu *vcpu);
> >
> > +static inline void kvm_do_schedule(struct kvm_vcpu *vcpu)
> > +{
> > +       schedule();
> > +}
> > +
> >   #define __KVM_HAVE_ARCH_VM_ALLOC 1
> >   struct kvm *kvm_arch_alloc_vm(void);
> >   void kvm_arch_free_vm(struct kvm *kvm);
> > diff --git a/arch/powerpc/include/asm/kvm_host.h 
> > b/arch/powerpc/include/asm/kvm_host.h
> > index af326cd..1aeecc0 100644
> > --- a/arch/powerpc/include/asm/kvm_host.h
> > +++ b/arch/powerpc/include/asm/kvm_host.h
> > @@ -628,4 +628,9 @@ struct kvm_vcpu_arch {
> >   #define __KVM_HAVE_ARCH_WQP
> >   #define __KVM_HAVE_CREATE_DEVICE
> >
> > +static inline void kvm_do_schedule(struct kvm_vcpu *vcpu)
> > +{
> > +       schedule();
> > +}
> > +
> >   #endif /* __POWERPC_KVM_HOST_H__ */
> > diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> > index 16bd5d1..db09a56 100644
> > --- a/arch/s390/include/asm/kvm_host.h
> > +++ b/arch/s390/include/asm/kvm_host.h
> > @@ -266,4 +266,9 @@ struct kvm_arch{
> >   };
> >
> >   extern int sie64a(struct kvm_s390_sie_block *, u64 *);
> > +static inline void kvm_do_schedule(struct kvm_vcpu *vcpu)
> > +{
> > +       schedule();
> > +}
> > +
> >   #endif
> > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> > index 95702de..72ff791 100644
> > --- a/arch/x86/include/asm/kvm_host.h
> > +++ b/arch/x86/include/asm/kvm_host.h
> > @@ -1042,5 +1042,5 @@ int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct 
> > msr_data *msr_info);
> >   int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
> >   void kvm_handle_pmu_event(struct kvm_vcpu *vcpu);
> >   void kvm_deliver_pmi(struct kvm_vcpu *vcpu);
> > -
> > +void kvm_do_schedule(struct kvm_vcpu *vcpu);
> >   #endif /* _ASM_X86_KVM_HOST_H */
> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> > index b963c86..d26c4be 100644
> > --- a/arch/x86/kvm/x86.c
> > +++ b/arch/x86/kvm/x86.c
> > @@ -7281,6 +7281,14 @@ bool kvm_arch_can_inject_async_page_present(struct 
> > kvm_vcpu *vcpu)
> >                         kvm_x86_ops->interrupt_allowed(vcpu);
> >   }
> >
> > +void kvm_do_schedule(struct kvm_vcpu *vcpu)
> > +{
> > +       /* We try to yield to a kikced vcpu else do a schedule */
> s/kikced/kicked/
:(.  Thanks .. will change that.

>
[...]


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