hardware: Correct log

We currently get the following error message if attempting to fit a
guest with hugepages on a node that doesn't have enough:

  Host does not support requested memory pagesize, or not enough free
  pages of the requested size. Requested: -2 kB

Correct this, removing the kB suffix and adding a note on the meaning of
the negative values, like we have for the success path.

Change-Id: I247dc0ec03cd9e5a7b41f5c5534bdfb1af550029
Signed-off-by: Stephen Finucane <[email protected]>
Closes-Bug: #2075959
(cherry picked from commit 4678bcb)
(cherry picked from commit f619311)
(cherry picked from commit 6147a05)

Author: stephenfin

nova/virt/hardware.py

@@ -943,7 +943,9 @@ def _numa_fit_instance_cell(
         if not pagesize:
             LOG.debug('Host does not support requested memory pagesize, '
                       'or not enough free pages of the requested size. '
-                      'Requested: %d kB', instance_cell.pagesize)
+                      'Requested memory pagesize: %d '
+                      '(small = -1, large = -2, any = -3)',
+                      instance_cell.pagesize)
             return None
         LOG.debug('Selected memory pagesize: %(selected_mem_pagesize)d kB. '
                   'Requested memory pagesize: %(requested_mem_pagesize)d '