VERIFIED:

New PASS:
man-pages-overrides-7.6.1-3.el7

"""
# man 2 mlock2 

MLOCK(2)                                                                        Linux Programmer's Manual                                                                       MLOCK(2)

NAME
       mlock, mlock2, munlock, mlockall, munlockall - lock and unlock memory

SYNOPSIS
       #include <sys/mman.h>

       int mlock(const void *addr, size_t len);
       int mlock2(const void *addr, size_t len, int flags);
       int munlock(const void *addr, size_t len);

       int mlockall(int flags);
       int munlockall(void);

DESCRIPTION
       mlock(), mlock2(), and mlockall() lock part or all of the calling process's virtual address space into RAM, preventing that memory from being paged to the swap area.

       munlock()  and  munlockall() perform the converse operation, unlocking part or all of the calling process's virtual address space, so that pages in the specified virtual address
       range may once more to be swapped out if required by the kernel memory manager.

       Memory locking and unlocking are performed in units of whole pages.
"""


Old FAIL:
man-pages-overrides-7.5.2-1.el7

#man 2 mlock2

No output on 'man 2 mlock2'

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3254