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KVM: MMU: add tracepoint for kvm_mmu_invalidate_all_pages

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It is good for debug and development

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Xiao Guangrong 2013-05-31 08:36:25 +08:00 • committed by Gleb Natapov
parent 2248b02321
commit 35006126f0
2 changed files with 21 additions and 0 deletions
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1
arch/x86/kvm/mmu.c
View file

@ -4264,6 +4264,7 @@ restart:
void kvm_mmu_invalidate_zap_all_pages(struct kvm *kvm) void kvm_mmu_invalidate_zap_all_pages(struct kvm *kvm)
{ {
spin_lock(&kvm->mmu_lock); spin_lock(&kvm->mmu_lock);
trace_kvm_mmu_invalidate_zap_all_pages(kvm);
kvm->arch.mmu_valid_gen++; kvm->arch.mmu_valid_gen++;
kvm_zap_obsolete_pages(kvm); kvm_zap_obsolete_pages(kvm);

20
arch/x86/kvm/mmutrace.h
View file

@ -276,6 +276,26 @@ TRACE_EVENT(
__spte_satisfied(old_spte), __spte_satisfied(new_spte) __spte_satisfied(old_spte), __spte_satisfied(new_spte)
) )
); );
TRACE_EVENT(
kvm_mmu_invalidate_zap_all_pages,
TP_PROTO(struct kvm *kvm),
TP_ARGS(kvm),
TP_STRUCT__entry(
__field(unsigned long, mmu_valid_gen)
__field(unsigned int, mmu_used_pages)
),
TP_fast_assign(
__entry->mmu_valid_gen = kvm->arch.mmu_valid_gen;
__entry->mmu_used_pages = kvm->arch.n_used_mmu_pages;
),
TP_printk("kvm-mmu-valid-gen %lx used_pages %x",
__entry->mmu_valid_gen, __entry->mmu_used_pages
)
);
#endif /* _TRACE_KVMMMU_H */ #endif /* _TRACE_KVMMMU_H */
#undef TRACE_INCLUDE_PATH #undef TRACE_INCLUDE_PATH