DRA scheduler: update some stale comments

Author: pohly

pkg/scheduler/framework/plugins/dynamicresources/dynamicresources.go

@@ -542,7 +542,7 @@ func (pl *DynamicResources) PreFilter(ctx context.Context, state *framework.Cycl
 		// expensive, we may have to maintain and update state more
 		// persistently.
 		//
-		// Claims are treated as "allocated" if they are in the assume cache
+		// Claims (and thus their devices) are treated as "allocated" if they are in the assume cache
 		// or currently their allocation is in-flight. This does not change
 		// during filtering, so we can determine that once.
 		allAllocatedDevices := pl.listAllAllocatedDevices(logger)

staging/src/k8s.io/dynamic-resource-allocation/structured/allocator.go

@@ -53,8 +53,7 @@ type Allocator struct {
 // NewAllocator returns an allocator for a certain set of claims or an error if
 // some problem was detected which makes it impossible to allocate claims.
 //
-// The returned Allocator is stateless. It calls the listers anew for each
-// Allocate call.
+// The returned Allocator can be used multiple times and is thread-safe.
 func NewAllocator(ctx context.Context,
 	adminAccessEnabled bool,
 	claimsToAllocate []*resourceapi.ResourceClaim,