[helper] support mlock on Solaris/SmartOS

helper/mlock/mlock_solaris.go

@@ -0,0 +1,17 @@
+// +build solaris
+
+package mlock
+
+import (
+       "syscall"
+       "golang.org/x/sys/unix"
+)
+
+func init() {
+       supported = true
+}
+
+func lockMemory() error {
+       // Mlockall prevents all current and future pages from being swapped out.
+       return unix.Mlockall(syscall.MCL_CURRENT | syscall.MCL_FUTURE)
+}

helper/mlock/mlock_unavail.go

@@ -1,4 +1,4 @@
-// +build windows plan9 darwin freebsd openbsd solaris
+// +build windows plan9 darwin freebsd openbsd
 
 package mlock