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authorAdin Scannell <ascannell@google.com>2018-10-30 22:45:51 -0700
committerShentubot <shentubot@google.com>2018-10-30 22:46:42 -0700
commit0091db9cbddb6c9fb4c96fbde980780c98006eda (patch)
tree0cb33cdebd9c93202780ab8a6a195b106d9e8eca /pkg/sentry/platform/kvm
parent245d81561b521bb94e3aa88fb704b967b023b0f1 (diff)
kvm: use private futexes.
Use private futexes for performance and to align with other runtime uses. PiperOrigin-RevId: 219422634 Change-Id: Ief2af5e8302847ea6dc246e8d1ee4d64684ca9dd
Diffstat (limited to 'pkg/sentry/platform/kvm')
-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 {