To clarify, I'm suggesting:

CONFIG_PAGE_POISONING=y
CONFIG_PAGE_POISONING_ZERO=y
CONFIG_PAGE_POISONING_NO_SANITY=y

this should have no impact on regular boots, and if someone boots with
"page_poison=1" then they get page wiping when page_alloc pages are
freed (and then GFP_ZERO is a no-op since it was already freed), so it
becomes a reasonable trade-off on performance vs gaining the wipe-on-
free ability of the buddy allocator.

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https://bugs.launchpad.net/bugs/1783651

Title:
  Please enable CONFIG_PAGE_POISONING

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