mmap with MAP_ANONYMOUS should have fd == -1

https://dpdk.org/tracker/show_bug.cgi?id=18

            Bug ID: 18
           Summary: mmap with MAP_ANONYMOUS should have fd == -1
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: CONFIRMED
          Severity: minor
          Priority: Normal
         Component: core
          Assignee: [email protected]
          Reporter: [email protected]

Target Milestone: ---

In the Linux version of eal_memory.c, if hugepages are disabled, a memory-map is performed with the MAP_ANONYMOUS flag
(http://dpdk.org/browse/dpdk/tree/lib/librte_eal/linuxapp/eal/eal_memory.c?h=v18.02#n1013).

According to the man page for mmap
(http://man7.org/linux/man-pages/man2/mmap.2.html), the fd argument should be set to -1 if MAP_ANONYMOUS is used, and not 0 as it currently is.

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