[PATCH 1/2] KVM: selftests: Allow >1 guest mode in access_tracking_perf_test
Gavin Shan
gshan at redhat.com
Sat Nov 12 02:03:45 PST 2022
On 11/12/22 7:19 AM, Oliver Upton wrote:
> As the name implies, for_each_guest_mode() will run the test case for
> all supported guest addressing modes. On x86 that doesn't amount to
> anything, but arm64 can handle 4K, 16K, and 64K page sizes on supporting
> hardware.
>
> Blindly attempting to run access_tracking_perf_test on arm64 stalls on
> the second test case, as the 'done' global remains set between test
> iterations. Clear it after VM teardown in anticipation of a subsequent
> test case.
>
> Signed-off-by: Oliver Upton <oliver.upton at linux.dev>
> ---
> tools/testing/selftests/kvm/access_tracking_perf_test.c | 3 +++
> 1 file changed, 3 insertions(+)
>
Reviewed-by: Gavin Shan <gshan at redhat.com>
> diff --git a/tools/testing/selftests/kvm/access_tracking_perf_test.c b/tools/testing/selftests/kvm/access_tracking_perf_test.c
> index 76c583a07ea2..4da066479e0a 100644
> --- a/tools/testing/selftests/kvm/access_tracking_perf_test.c
> +++ b/tools/testing/selftests/kvm/access_tracking_perf_test.c
> @@ -326,6 +326,9 @@ static void run_test(enum vm_guest_mode mode, void *arg)
>
> perf_test_join_vcpu_threads(nr_vcpus);
> perf_test_destroy_vm(vm);
> +
> + /* Clear done in anticipation of testing another guest mode */
> + done = false;
> }
>
> static void help(char *name)
>
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