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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2010-11-01 16:58:43 +0800
committerAvi Kivity <avi@redhat.com>2011-01-12 11:28:56 +0200
commitc9b263d2be9c535b410f6617710534f798bf0ff0 (patch)
tree1ae7a644cb583bf3de163c07220083caecb14eed
parent2653503769ef9ae771509e1358a3da8de8d21709 (diff)
downloadop-kernel-dev-c9b263d2be9c535b410f6617710534f798bf0ff0.zip
op-kernel-dev-c9b263d2be9c535b410f6617710534f798bf0ff0.tar.gz
KVM: fix tracing kvm_try_async_get_page
Tracing 'async' and *pfn is useless, since 'async' is always true, and '*pfn' is always "fault_pfn' We can trace 'gva' and 'gfn' instead, it can help us to see the life-cycle of an async_pf Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
-rw-r--r--arch/x86/kvm/mmu.c2
-rw-r--r--include/trace/events/kvm.h12
2 files changed, 8 insertions, 6 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 53509f5..272e302 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2628,7 +2628,7 @@ static bool try_async_pf(struct kvm_vcpu *vcpu, bool no_apf, gfn_t gfn,
put_page(pfn_to_page(*pfn));
if (!no_apf && can_do_async_pf(vcpu)) {
- trace_kvm_try_async_get_page(async, *pfn);
+ trace_kvm_try_async_get_page(gva, gfn);
if (kvm_find_async_pf_gfn(vcpu, gfn)) {
trace_kvm_async_pf_doublefault(gva, gfn);
kvm_make_request(KVM_REQ_APF_HALT, vcpu);
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index c86f4e8..d94d6c3 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -218,18 +218,20 @@ TRACE_EVENT(kvm_age_page,
#ifdef CONFIG_KVM_ASYNC_PF
TRACE_EVENT(
kvm_try_async_get_page,
- TP_PROTO(bool async, u64 pfn),
- TP_ARGS(async, pfn),
+ TP_PROTO(u64 gva, u64 gfn),
+ TP_ARGS(gva, gfn),
TP_STRUCT__entry(
- __field(__u64, pfn)
+ __field(u64, gva)
+ __field(u64, gfn)
),
TP_fast_assign(
- __entry->pfn = (!async) ? pfn : (u64)-1;
+ __entry->gva = gva;
+ __entry->gfn = gfn;
),
- TP_printk("pfn %#llx", __entry->pfn)
+ TP_printk("gva = %#llx, gfn = %#llx", __entry->gva, __entry->gfn)
);
TRACE_EVENT(
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