diff options
| author | Avi Kivity <avi@redhat.com> | 2009-12-31 12:10:16 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:36:09 -0300 |
| commit | 90bb6fc556ab255abd798bcf4ff5769690ab2eea (patch) | |
| tree | dd17338dbcb5a2963800639bcf097595861810d2 | |
| parent | 43db669730743fcc2a74b641ff4d77781eb15bfa (diff) | |
| download | lwn-90bb6fc556ab255abd798bcf4ff5769690ab2eea.tar.gz lwn-90bb6fc556ab255abd798bcf4ff5769690ab2eea.zip | |
KVM: MMU: Add tracepoint for guest page aging
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/mmu.c | 11 | ||||
| -rw-r--r-- | include/trace/events/kvm.h | 22 |
2 files changed, 30 insertions, 3 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index b8da6715d08b..739793240d1d 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -151,6 +151,9 @@ module_param(oos_shadow, bool, 0644); #define ACC_USER_MASK PT_USER_MASK #define ACC_ALL (ACC_EXEC_MASK | ACC_WRITE_MASK | ACC_USER_MASK) +#include <trace/events/kvm.h> + +#undef TRACE_INCLUDE_FILE #define CREATE_TRACE_POINTS #include "mmutrace.h" @@ -792,6 +795,7 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, unsigned long data)) { int i, j; + int ret; int retval = 0; struct kvm_memslots *slots; @@ -806,16 +810,17 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, if (hva >= start && hva < end) { gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT; - retval |= handler(kvm, &memslot->rmap[gfn_offset], - data); + ret = handler(kvm, &memslot->rmap[gfn_offset], data); for (j = 0; j < KVM_NR_PAGE_SIZES - 1; ++j) { int idx = gfn_offset; idx /= KVM_PAGES_PER_HPAGE(PT_DIRECTORY_LEVEL + j); - retval |= handler(kvm, + ret |= handler(kvm, &memslot->lpage_info[j][idx].rmap_pde, data); } + trace_kvm_age_page(hva, memslot, ret); + retval |= ret; } } diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h index 8abdc1230143..b17d49dfc3ef 100644 --- a/include/trace/events/kvm.h +++ b/include/trace/events/kvm.h @@ -164,6 +164,28 @@ TRACE_EVENT(kvm_fpu, TP_printk("%s", __print_symbolic(__entry->load, kvm_fpu_load_symbol)) ); +TRACE_EVENT(kvm_age_page, + TP_PROTO(ulong hva, struct kvm_memory_slot *slot, int ref), + TP_ARGS(hva, slot, ref), + + TP_STRUCT__entry( + __field( u64, hva ) + __field( u64, gfn ) + __field( u8, referenced ) + ), + + TP_fast_assign( + __entry->hva = hva; + __entry->gfn = + slot->base_gfn + ((hva - slot->userspace_addr) >> PAGE_SHIFT); + __entry->referenced = ref; + ), + + TP_printk("hva %llx gfn %llx %s", + __entry->hva, __entry->gfn, + __entry->referenced ? "YOUNG" : "OLD") +); + #endif /* _TRACE_KVM_MAIN_H */ /* This part must be outside protection */ |