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Revert "KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin()"

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This reverts commit 1ea1717b12.
This commit is contained in:
Ksawlii 2024-11-24 00:22:53 +01:00
parent 0a13b31c06
commit f172b138b7
1 changed files with 2 additions and 3 deletions
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5
virt/kvm/kvm_main.c
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@ -3090,13 +3090,12 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me, bool yield_to_kernel_mode)
{ {
struct kvm *kvm = me->kvm; struct kvm *kvm = me->kvm;
struct kvm_vcpu *vcpu; struct kvm_vcpu *vcpu;
int last_boosted_vcpu; int last_boosted_vcpu = me->kvm->last_boosted_vcpu;
int yielded = 0; int yielded = 0;
int try = 3; int try = 3;
int pass; int pass;
int i; int i;
last_boosted_vcpu = READ_ONCE(kvm->last_boosted_vcpu);
kvm_vcpu_set_in_spin_loop(me, true); kvm_vcpu_set_in_spin_loop(me, true);
/* /*
* We boost the priority of a VCPU that is runnable but not * We boost the priority of a VCPU that is runnable but not
@ -3127,7 +3126,7 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me, bool yield_to_kernel_mode)
yielded = kvm_vcpu_yield_to(vcpu); yielded = kvm_vcpu_yield_to(vcpu);
if (yielded > 0) { if (yielded > 0) {
WRITE_ONCE(kvm->last_boosted_vcpu, i); kvm->last_boosted_vcpu = i;
break; break;
} else if (yielded < 0) { } else if (yielded < 0) {
try--; try--;