If NUMA is disabled, hpage is used as page pre-alloc, so there are
two cases for hpage:
- it is !NULL, means the page is not consumed otherwise,
- the page has been consumed
If NUMA is enabled, hpage is just used as alloc-fail indicator which
is not a real page, NULL means not fail triggered.
If NUMA is disabled, hpage is used as page pre-alloc, so there are
two cases for hpage:
- it is !NULL, means the page is not consumed otherwise,
- the page has been consumed
If NUMA is enabled, hpage is just used as alloc-fail indicator which
is not a real page, NULL means not fail triggered.
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