Messages in this thread Patch in this message | | | From | Sean Christopherson <> | Subject | [PATCH v3 06/21] KVM: x86/mmu: Move fast_page_fault() call above mmu_topup_memory_caches() | Date | Thu, 2 Jul 2020 19:35:30 -0700 |
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Avoid refilling the memory caches and potentially slow reclaim/swap when handling a fast page fault, which does not need to allocate any new objects.
Reviewed-by: Ben Gardon <bgardon@google.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> --- arch/x86/kvm/mmu/mmu.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 748235877def..3d0768e16463 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -4095,6 +4095,9 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, if (page_fault_handle_page_track(vcpu, error_code, gfn)) return RET_PF_EMULATE; + if (fast_page_fault(vcpu, gpa, error_code)) + return RET_PF_RETRY; + r = mmu_topup_memory_caches(vcpu); if (r) return r; @@ -4102,9 +4105,6 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, if (lpage_disallowed) max_level = PG_LEVEL_4K; - if (fast_page_fault(vcpu, gpa, error_code)) - return RET_PF_RETRY; - mmu_seq = vcpu->kvm->mmu_notifier_seq; smp_rmb(); -- 2.26.0
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