static BUDDY_ALLOC_FAIL_COUNTS: [AtomicUsize; 12]Expand description
Per-order allocation failure counters.
BUDDY_ALLOC_FAIL_COUNTS[order] counts how many times a request for
order failed to find a free block at order or any higher order.
These are incremented in alloc_from_zone when the loop exhausts all
orders without finding a free block.
Read via buddy_alloc_fail_counts_snapshot() for diagnostics.