const runtime.gcDrainUntilPreempt

5 uses

	runtime (current package)
		mgcmark.go#L1093: 	gcDrainUntilPreempt gcDrainFlags = 1 << iota
		mgcmark.go#L1102: 	gcDrain(gcw, gcDrainIdle|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1110: 		flags |= gcDrainUntilPreempt
		mgcmark.go#L1118: 	gcDrain(gcw, gcDrainFractional|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1160: 	preemptible := flags&gcDrainUntilPreempt != 0