ON-16341: force 2MB huge page allocation to run on 1GB default systems

[rdrinkwa-xilinx]

Allocated 2MB huge pages and 1GB huge pages remains zero. System default set via kernel command line to be 1G.

Before:

[server01:tcpdirect]$ ZF_ATTR="interface=eth0" ./build/bin/zf_apps/static/zfsink -r 192.1.2.3:25000
ERROR: main: ZF_TRY(zfur_addr_bind(ur, ai_local->ai_addr, ai_local->ai_addrlen, NULL, 0, 0)) failed
ERROR: at src/tests/zf_apps//zfsink.c:365
ERROR: rc=-28 (No space left on device) errno=28
Aborted (core dumped)

After

[server01:tcpdirect]$ ZF_ATTR="interface=eth0" ./build/bin/zf_apps/static/zfsink -r 192.1.2.3:25000
# pkt-rate  bandwidth(Mbps)      total-pkts
         0                0                0
^C

[tcrawley-xilinx]

This is targeting master, should this also go onto v9_0 or v8_1?

[rdrinkwa-xilinx]

This is targeting master, should this also go onto v9_0 or v8_1?

This was the more general change that would apply for v9 and onwards. There was a significant change for v8 that necessitated a different fix be used and that was applied to that specific branch. Since this was the first implementation I added it to master rather than v9_0 but I can rebase if desired.

[matthewr-xilinx]

Changes look sane.

Would suggest rebasing on top of v9_0 branch (which can then get merged forwards into master) so it doesn't get missed out.