}

var listCache sync.Map // map[string]listImports, keyed by contextName

// listSem is a semaphore restricting concurrent invocations of 'go list'. 'go
// list' has its own internal concurrency, so we use a hard-coded constant (to
// allow the I/O-intensive phases of 'go list' to overlap) instead of scaling
// all the way up to GOMAXPROCS.
var listSem = make(chan semToken, 2)

type semToken struct{}

	var entries []chan metaCacheEntry

	for poolIdx, erasureSet := range z.serverPools {
		for setIdx, set := range erasureSet.sets {
			set := set
			listOut := make(chan metaCacheEntry, 1)
			entries = append(entries, listOut)
			disks, infos, _ := set.getOnlineDisksWithHealingAndInfo(true)
			if len(disks) == 0 {
				xioutil.SafeClose(results)