lib: Memory reporting fails over 2GB

The old style mallinfo() function uses an 'int' to
report memory usage data to the program.  Unfortunately
modern architectures can chew through 2gb of memory like a
buzz saw hitting some warm butter, especially in the case
of a memory leak or memory fragmentation.

When a daemon uses more than 2gb of memory, just indicate it's
gotten large and we don't know anymore.

Pre-change behavior:
Robot-1# show memory
System allocator statistics:
Total heap allocated: 16777216 TiB
Holding block headers: 1288 KiB
Used small blocks: 0 bytes
Used ordinary blocks: 535 MiB
Free small blocks: 768 bytes
Free ordinary blocks: 16777216 TiB
Ordinary blocks: 266107
Small blocks: 24
Holding blocks: 2

Post-change behavior:
Robot-1# show memory
System allocator statistics:
  Total heap allocated:  1572 KiB
  Holding block headers: > 2GB
  Used small blocks:     0 bytes
  Used ordinary blocks:  1443 KiB
  Free small blocks:     32 bytes
  Free ordinary blocks:  129 KiB
  Ordinary blocks:       2
  Small blocks:          1
  Holding blocks:        2

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

0 files changed, 0 insertions, 0 deletions