diff mbox series

[03/11] KVM: selftests: Always clear dirty bitmap after iteration

Message ID 20201104212357.171559-4-drjones@redhat.com (mailing list archive)
State New, archived
Headers show
Series KVM: selftests: Cleanups | expand

Commit Message

Andrew Jones Nov. 4, 2020, 9:23 p.m. UTC 
From: Peter Xu <peterx@redhat.com>

We don't clear the dirty bitmap before because KVM_GET_DIRTY_LOG will
clear it for us before copying the dirty log onto it.  However we'd
still better to clear it explicitly instead of assuming the kernel
will always do it for us.

More importantly, in the upcoming dirty ring tests we'll start to
fetch dirty pages from a ring buffer, so no one is going to clear the
dirty bitmap for us.

Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 tools/testing/selftests/kvm/dirty_log_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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 37445aa4876f..954331c2fda2 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -195,7 +195,7 @@  static void vm_dirty_log_verify(enum vm_guest_mode mode, unsigned long *bmap)
 				    page);
 		}
 
-		if (test_bit_le(page, bmap)) {
+		if (test_and_clear_bit_le(page, bmap)) {
 			host_dirty_count++;
 			/*
 			 * If the bit is set, the value written onto