w := xioutil.NewDeadlineWorker(globalDriveConfig.GetMaxTimeout())
				return w.Run(func() error {
					wait := deleteCleanupSleeper.Timer(ctx)
					removeAll(pathJoin(drivePath, minioMetaTmpDeletedBucket, ddir))
					wait()
					return nil
				})
			})
		}(disk)
	}
	wg.Wait()
}

		cacheDuration = defaultCacheDuration
	}
	timer := time.NewTimer(cacheDuration)
	defer timer.Stop()

	for {
		select {
		case <-ctx.Done():
			return
		case <-timer.C:
			c.RefreshKey(ctx, logger)

			// Reset for the next interval
			timer.Reset(cacheDuration)
		}
	}
}

type kesClient struct {
	lock         sync.RWMutex

			if err != nil {
				return nil
			}
			w := xioutil.NewDeadlineWorker(globalDriveConfig.GetMaxTimeout())
			return w.Run(func() error {
				wait := deleteMultipartCleanupSleeper.Timer(ctx)
				if time.Since(fi.ModTime) > expiry {
					pathUUID := mustGetUUID()
					targetPath := pathJoin(drivePath, minioMetaTmpDeletedBucket, pathUUID)

			diskBuckets := set.CreateStringSet()
			for _, bucket := range buckets {
				diskBuckets.Add(bucket.Name)
			}
			sys.RemoveStaleBuckets(diskBuckets)

			for i := range buckets {
				wait := sleeper.Timer(ctx)

				meta, err := loadBucketMetadata(ctx, sys.objAPI, buckets[i].Name)
				if err != nil {
					internalLogIf(ctx, err, logger.WarningKind)
					wait() // wait to proceed to next entry.
					continue
				}

		}
		if maxWait > 0 && wantSleep > maxWait {
			wantSleep = maxWait
		}
		timer := time.NewTimer(wantSleep)
		select {
		case <-ctx.Done():
			if !timer.Stop() {
				<-timer.C
				if d.isScanner {
					globalScannerMetrics.incTime(scannerMetricYield, wantSleep)
				}
			}
			return
		case <-timer.C:
			if d.isScanner {
				globalScannerMetrics.incTime(scannerMetricYield, wantSleep)

			wg.Wait()

			// Reset for the next interval
			timer.Reset(globalAPIConfig.getDeleteCleanupInterval())
		}
	}
}

func (s *erasureSets) cleanupStaleUploads(ctx context.Context) {
	timer := time.NewTimer(globalAPIConfig.getStaleUploadsCleanupInterval())
	defer timer.Stop()

	for {
		select {
		case <-ctx.Done():
			return
		case <-timer.C:
			var wg sync.WaitGroup
			for _, set := range s.sets {

		return context.DeadlineExceeded
	}
}

// NewDeadlineWriter wraps a writer to make it respect given deadline
// value per Write(). If there is a blocking write, the returned Writer
// will return whenever the timer hits (the return values are n=0
// and err=context.DeadlineExceeded.)
func NewDeadlineWriter(w io.WriteCloser, timeout time.Duration) io.WriteCloser {
	return &DeadlineWriter{WriteCloser: w, timeout: timeout}
}

		defer cancel()
		dm.Unlock(ctx)
		unlockReturned <- struct{}{}
	}()

	timer := time.NewTimer(2 * testDrwMutexUnlockCallTimeout)
	defer timer.Stop()

	select {
	case <-unlockReturned:
		t.Fatal("Unlock timed out, which should not happen")
	case <-timer.C:
	}
}

// Borrowed from mutex_test.go
func HammerMutex(m *DRWMutex, loops int, cdone chan bool) {

	collectLocalResourceMetrics()

	for {
		select {
		case <-GlobalContext.Done():
			return
		case <-metricsTimer.C:
			collectLocalResourceMetrics()

			// Reset the timer for next cycle.
			metricsTimer.Reset(resourceMetricsCollectionInterval)
		}
	}
}

// minioResourceCollector is the Collector for resource metrics
type minioResourceCollector struct {

// sequence automatically resumes. The return value indicates if the
// operation succeeded.
func (h *healSequence) pushHealResultItem(r madmin.HealResultItem) error {
	// start a timer to keep an upper time limit to find an empty
	// slot to add the given heal result - if no slot is found it
	// means that the server is holding the maximum amount of
	// heal-results in memory and the client has not consumed it