const runtime.gcDrainUntilPreempt

5 uses

	runtime (current package)
		mgcmark.go#L1091: 	gcDrainUntilPreempt gcDrainFlags = 1 << iota
		mgcmark.go#L1100: 	gcDrain(gcw, gcDrainIdle|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1108: 		flags |= gcDrainUntilPreempt
		mgcmark.go#L1116: 	gcDrain(gcw, gcDrainFractional|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1158: 	preemptible := flags&gcDrainUntilPreempt != 0