const runtime.gcDrainUntilPreempt

5 uses

	runtime (current package)
		mgcmark.go#L1173: 	gcDrainUntilPreempt gcDrainFlags = 1 << iota
		mgcmark.go#L1182: 	gcDrain(gcw, gcDrainIdle|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1190: 		flags |= gcDrainUntilPreempt
		mgcmark.go#L1198: 	gcDrain(gcw, gcDrainFractional|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1262: 	preemptible := flags&gcDrainUntilPreempt != 0