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KVM: MMU: Push trace_kvm_age_page() into kvm_age_rmapp() 

This restricts the tracing to page aging and makes it possible to
optimize kvm_handle_hva_range() further in the following patch.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2012-07-02 17:58:48 +09:00 committed by Marcelo Tosatti
parent 048212d0bc
commit f395302e09
1 changed files with 10 additions and 13 deletions
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23
arch/x86/kvm/mmu.c
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@ -1269,8 +1269,7 @@ static int kvm_handle_hva_range(struct kvm *kvm,
unsigned long data))
{
int j;
int ret;
int retval = 0;
int ret = 0;
struct kvm_memslots *slots;
struct kvm_memory_slot *memslot;
@ -1293,8 +1292,6 @@ static int kvm_handle_hva_range(struct kvm *kvm,
gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
for (; gfn < gfn_end; ++gfn) {
ret = 0;
for (j = PT_PAGE_TABLE_LEVEL;
j < PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES; ++j) {
unsigned long *rmapp;
@ -1302,14 +1299,10 @@ static int kvm_handle_hva_range(struct kvm *kvm,
rmapp = __gfn_to_rmap(gfn, j, memslot);
ret |= handler(kvm, rmapp, memslot, data);
}
trace_kvm_age_page(memslot->userspace_addr +
(gfn - memslot->base_gfn) * PAGE_SIZE,
memslot, ret);
retval |= ret;
}
}
return retval;
return ret;
}
static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
@ -1351,8 +1344,10 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
* This has some overhead, but not as much as the cost of swapping
* out actively used pages or breaking up actively used hugepages.
*/
if (!shadow_accessed_mask)
return kvm_unmap_rmapp(kvm, rmapp, slot, data);
if (!shadow_accessed_mask) {
young = kvm_unmap_rmapp(kvm, rmapp, slot, data);
goto out;
}
for (sptep = rmap_get_first(*rmapp, &iter); sptep;
sptep = rmap_get_next(&iter)) {
@ -1364,7 +1359,9 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp,
(unsigned long *)sptep);
}
}
out:
/* @data has hva passed to kvm_age_hva(). */
trace_kvm_age_page(data, slot, young);
return young;
}
@ -1413,7 +1410,7 @@ static void rmap_recycle(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn)
int kvm_age_hva(struct kvm *kvm, unsigned long hva)
{
return kvm_handle_hva(kvm, hva, 0, kvm_age_rmapp);
return kvm_handle_hva(kvm, hva, hva, kvm_age_rmapp);
}
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)