diff mbox series

[02/20] KVM: selftests: Sync dirty_log_test iteration to guest *before* resuming

Message ID 20241214010721.2356923-3-seanjc@google.com (mailing list archive)
State New
Headers show
Series [01/20] KVM: selftests: Support multiple write retires in dirty_log_test | expand

Commit Message

Sean Christopherson Dec. 14, 2024, 1:07 a.m. UTC 
Sync the new iteration to the guest prior to restarting the vCPU, otherwise
it's possible for the vCPU to dirty memory for the next iteration using the
current iteration's value.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 tools/testing/selftests/kvm/dirty_log_test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index cdae103314fc..41c158cf5444 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -859,9 +859,9 @@  static void run_test(enum vm_guest_mode mode, void *arg)
 		 */
 		if (++iteration == p->iterations)
 			WRITE_ONCE(host_quit, true);
-
-		sem_post(&sem_vcpu_cont);
 		sync_global_to_guest(vm, iteration);
+
+		sem_post(&sem_vcpu_cont);
 	}
 
 	pthread_join(vcpu_thread, NULL);