some node will pass to f() function many times, is this a bug or a feature?

[sunfeilong]

goleveldb/leveldb/cache/cache.go

Line 327 in 126854a

f(nodes)

        var nodes []*Node
	for x := range h.buckets {
		b := h.initBucket(uint32(x))

		b.mu.Lock()
		nodes = append(nodes, b.nodes...)
		b.mu.Unlock()
		f(nodes)
	}