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KVM: make halt_poll_ns per-vCPU

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Change halt_poll_ns into per-VCPU variable, seeded from module parameter,
to allow greater flexibility.

Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Wanpeng Li 2015-09-03 22:07:37 +08:00 committed by Paolo Bonzini
parent e8dd2d2d64
commit 19020f8ab8
2 changed files with 4 additions and 2 deletions
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1
include/linux/kvm_host.h
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@ -242,6 +242,7 @@ struct kvm_vcpu {
int sigset_active;
sigset_t sigset;
struct kvm_vcpu_stat stat;
unsigned int halt_poll_ns;
#ifdef CONFIG_HAS_IOMEM
int mmio_needed;

5
virt/kvm/kvm_main.c
View File

@ -217,6 +217,7 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
vcpu->kvm = kvm;
vcpu->vcpu_id = id;
vcpu->pid = NULL;
vcpu->halt_poll_ns = 0;
init_waitqueue_head(&vcpu->wq);
kvm_async_pf_vcpu_init(vcpu);
@ -1930,8 +1931,8 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
bool waited = false;
start = cur = ktime_get();
if (halt_poll_ns) {
ktime_t stop = ktime_add_ns(ktime_get(), halt_poll_ns);
if (vcpu->halt_poll_ns) {
ktime_t stop = ktime_add_ns(ktime_get(), vcpu->halt_poll_ns);
do {
/*