Does ZONE_HIGHMEM exist on machines with 1G memeory

[Ronghua Zhang]

  This may be a dumb question. But it seems to me that when the machine
has 1GB memory, it can be mapped to the 1GB kernel virtual address space.
Do we still need ZONE_HIGHMEM in this case? Please CC any follow-up to me.
Thanks

Ronghua
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