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-rw-r--r--pkg/sentry/platform/kvm/machine_unsafe.go4
1 files changed, 2 insertions, 2 deletions
diff --git a/pkg/sentry/platform/kvm/machine_unsafe.go b/pkg/sentry/platform/kvm/machine_unsafe.go
index 4f5b01321..38c1f102f 100644
--- a/pkg/sentry/platform/kvm/machine_unsafe.go
+++ b/pkg/sentry/platform/kvm/machine_unsafe.go
@@ -88,7 +88,7 @@ func (c *vCPU) notify() {
_, _, errno := syscall.RawSyscall6(
syscall.SYS_FUTEX,
uintptr(unsafe.Pointer(&c.state)),
- linux.FUTEX_WAKE,
+ linux.FUTEX_WAKE|linux.FUTEX_PRIVATE_FLAG,
^uintptr(0), // Number of waiters.
0, 0, 0)
if errno != 0 {
@@ -106,7 +106,7 @@ func (c *vCPU) waitUntilNot(state uint32) {
_, _, errno := syscall.Syscall6(
syscall.SYS_FUTEX,
uintptr(unsafe.Pointer(&c.state)),
- linux.FUTEX_WAIT,
+ linux.FUTEX_WAIT|linux.FUTEX_PRIVATE_FLAG,
uintptr(state),
0, 0, 0)
if errno != 0 && errno != syscall.EINTR && errno != syscall.EAGAIN {