Mark Johnston 321e586e46 posixshm tests: Fix occasional largepage_mprotect failures
largepage_mprotect maps a superpage and later extends the mapping.  This
occasionally fails with ASLR disabled.  To fix this, first try to
reserve a sufficiently large virtual address region.

Reported by:	Jenkins
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2022-01-03 13:00:50 -05:00
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