Messages in this thread Patch in this message | | | Date | Wed, 10 Feb 2021 15:06:21 -0800 | Subject | [PATCH 11/15] KVM: selftests: Create VM with adjusted number of guest pages for perf tests | From | Sean Christopherson <> |
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Use the already computed guest_num_pages when creating the so called extra VM pages for a perf test, and add a comment explaining why the pages are allocated as extra pages.
Signed-off-by: Sean Christopherson <seanjc@google.com> --- tools/testing/selftests/kvm/lib/perf_test_util.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/kvm/lib/perf_test_util.c b/tools/testing/selftests/kvm/lib/perf_test_util.c index 982a86c8eeaa..9b0cfdf10772 100644 --- a/tools/testing/selftests/kvm/lib/perf_test_util.c +++ b/tools/testing/selftests/kvm/lib/perf_test_util.c @@ -71,9 +71,12 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int vcpus, TEST_ASSERT(vcpu_memory_bytes % pta->guest_page_size == 0, "Guest memory size is not guest page size aligned."); - vm = vm_create_with_vcpus(mode, vcpus, - (vcpus * vcpu_memory_bytes) / pta->guest_page_size, - 0, guest_code, NULL); + /* + * Pass guest_num_pages to populate the page tables for test memory. + * The memory is also added to memslot 0, but that's a benign side + * effect as KVM allows aliasing HVAs in memslots. + */ + vm = vm_create_with_vcpus(mode, vcpus, 0, guest_num_pages, guest_code, NULL); pta->vm = vm; /* -- 2.30.0.478.g8a0d178c01-goog
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