Module buddy 

Macros

buddy_dbg 🔒

Structs

BuddyAllocator

CompactionCandidate 🔒

CompactionStats

Snapshot of the last fragmentation-driven compaction assist attempt.

LocalFrameCache 🔒

OnDemandGlobalLock 🔒

ZoneStats

Snapshot statistics for a single memory zone.

Enums

ZonePressure

Derived pressure state for a zone snapshot.

Constants

COMPACTION_FRAGMENTATION_THRESHOLD 🔒

COMPACTION_SNAPSHOT_NONE 🔒

DMA_MAX 🔒

LOCAL_CACHED_ZONE_MIGRATETYPE_SLOTS 🔒

LOCAL_CACHE_CAPACITY 🔒

LOCAL_CACHE_FLUSH_BATCH 🔒

LOCAL_CACHE_REFILL_FRAMES 🔒

LOCAL_CACHE_REFILL_ORDER 🔒

LOCAL_CACHE_SLOTS 🔒

MOVABLE_ZONE_ORDER 🔒

NORMAL_MAX 🔒

PAGE_SIZE 🔒

UNMOVABLE_ZONE_ORDER 🔒

Statics

ALLOC_IN_PROGRESS 🔒

Per-CPU flag to detect recursive allocations (deadlocks from logs/interrupts)

BUDDY_ALLOCATOR 🔒

BUDDY_ALLOC_FAIL_COUNTS 🔒

Per-order allocation failure counters.

COMPACTION_ATTEMPTS 🔒

COMPACTION_LAST_AVAILABLE_PAGES 🔒

COMPACTION_LAST_CACHED_PAGES 🔒

COMPACTION_LAST_DRAINED_PAGES 🔒

COMPACTION_LAST_FRAGMENTATION 🔒

COMPACTION_LAST_MATCHING_PAGEBLOCKS 🔒

COMPACTION_LAST_MIGRATETYPE 🔒

COMPACTION_LAST_ORDER 🔒

COMPACTION_LAST_PAGEBLOCK_COUNT 🔒

COMPACTION_LAST_PRESSURE 🔒

COMPACTION_LAST_REQUESTED_PAGES 🔒

COMPACTION_LAST_USABLE_PAGES 🔒

COMPACTION_LAST_ZONE 🔒

COMPACTION_SUCCESSES 🔒

LOCAL_CACHED_FRAMES 🔒

LOCAL_CACHED_ZONE_FRAMES 🔒

LOCAL_CACHED_ZONE_MIGRATETYPE_FRAMES 🔒

LOCAL_FRAME_CACHES 🔒

Per-CPU frame caches protected by a PreemptDisabled guardian.

POISON_QUARANTINE_PAGES 🔒

Pages permanently withheld from the buddy free lists due to [meta_guard::POISONED].

Functions

alloc

Allocate frames with per-CPU caching on order-0 requests.

alloc_migratetype

Allocate frames with an explicit migratetype preference.

alloc_order0_cached 🔒

buddy_alloc_fail_counts_snapshot

Returns the buddy allocation failure counts by order.

compaction_stats_snapshot

Snapshot compaction-assist telemetry without locking the allocator.

debug_buddy_lock_addr

Returns the global buddy lock address for deadlock tracing.

drain_local_caches_for_zone 🔒

drain_local_caches_to_global 🔒

free

Free frames with per-CPU caching on order-0 requests.

free_order0_cached 🔒

get_allocator

Returns allocator.

init_buddy_allocator

Initializes buddy allocator.

is_cacheable_phys_for 🔒

local_cache_slot 🔒

local_cached_dec_phys 🔒

local_cached_inc_phys 🔒

local_cached_zone_migratetype_count 🔒

local_cached_zone_migratetype_slot 🔒

poison_quarantine_pages_snapshot

Snapshot of pages quarantined (not recycled) because frame metadata reported poison.

record_buddy_alloc_fail 🔒

Records a buddy allocation failure for the given order.

record_compaction_attempt 🔒

refill_local_cache 🔒

snapshot_migratetype 🔒

snapshot_zone_type 🔒

steal_from_other_caches 🔒

zone_index_for_phys 🔒

Type Aliases

GlobalGuard 🔒