TIL mmap() with MAP_POPULATE and huge tlb will return a valid pointer and then SIGBUS you if you have non left in your NUMA node. Aaaaaargh!
Also, do you have overcommit disabled? If so it's surely a bug, regardless of whether he calls it one.
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Huge pages don't overcommit.
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Regardless, signal after "successful" alloc is "not a bug" with overcommit on, but is a very serious bug with oc off.
End of conversation
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