const runtime.gcDrainUntilPreempt

5 uses

	runtime (current package)
		mgcmark.go#L1159: 	gcDrainUntilPreempt gcDrainFlags = 1 << iota
		mgcmark.go#L1168: 	gcDrain(gcw, gcDrainIdle|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1176: 		flags |= gcDrainUntilPreempt
		mgcmark.go#L1184: 	gcDrain(gcw, gcDrainFractional|gcDrainUntilPreempt|gcDrainFlushBgCredit)
		mgcmark.go#L1248: 	preemptible := flags&gcDrainUntilPreempt != 0