runtime: reduced struct sizes found via pahole

During my research of pahole with Go structs, I've found couple of
structs in runtime/ pkg where we can reduce several structs' sizes
highligted by pahole tool which detect byte holes and paddings.

Overall, there are 80 bytes reduced.

Change-Id: I398e5ed6f5b199394307741981cb5ad5b875e98f
Reviewed-on: https://go-review.googlesource.com/c/go/+/578795
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Joedian Reid <joedian@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/src/runtime/mgcscavenge.go b/src/runtime/mgcscavenge.go
index dede4a1ad3..8102940a7c 100644
--- a/src/runtime/mgcscavenge.go
+++ b/src/runtime/mgcscavenge.go
@@ -281,15 +281,19 @@ type scavengerState struct {
 	// g is the goroutine the scavenger is bound to.
 	g *g
 
-	// parked is whether or not the scavenger is parked.
-	parked bool
-
 	// timer is the timer used for the scavenger to sleep.
 	timer *timer
 
 	// sysmonWake signals to sysmon that it should wake the scavenger.
 	sysmonWake atomic.Uint32
 
+	// parked is whether or not the scavenger is parked.
+	parked bool
+
+	// printControllerReset instructs printScavTrace to signal that
+	// the controller was reset.
+	printControllerReset bool
+
 	// targetCPUFraction is the target CPU overhead for the scavenger.
 	targetCPUFraction float64
 
@@ -312,10 +316,6 @@ type scavengerState struct {
 	// value. Used if the controller's assumptions fail to hold.
 	controllerCooldown int64
 
-	// printControllerReset instructs printScavTrace to signal that
-	// the controller was reset.
-	printControllerReset bool
-
 	// sleepStub is a stub used for testing to avoid actually having
 	// the scavenger sleep.
 	//