diff --git a/core/front/tiny_unified_cache.c b/core/front/tiny_unified_cache.c
index 5fd29ed7..e6029aed 100644
--- a/core/front/tiny_unified_cache.c
+++ b/core/front/tiny_unified_cache.c
@@ -497,40 +497,6 @@ hak_base_ptr_t unified_cache_refill(int class_idx) {
             // Freelist pop
             void* p = m->freelist;
 
-            // Validate freelist head before dereferencing (only in debug builds)
-            #if !HAKMEM_BUILD_RELEASE
-            do {
-                SuperSlab* fl_ss = hak_super_lookup(p);
-                int fl_cap = fl_ss ? ss_slabs_capacity(fl_ss) : 0;
-                int fl_idx = (fl_ss && fl_ss->magic == SUPERSLAB_MAGIC) ? slab_index_for(fl_ss, p) : -1;
-                uint8_t fl_cls = (fl_idx >= 0 && fl_idx < fl_cap) ? fl_ss->slabs[fl_idx].class_idx : 0xff;
-                if (!fl_ss || fl_ss->magic != SUPERSLAB_MAGIC ||
-                    fl_idx != tls->slab_idx || fl_ss != tls->ss ||
-                    fl_cls != (uint8_t)class_idx) {
-                    static _Atomic uint32_t g_fl_invalid = 0;
-                    uint32_t shot = atomic_fetch_add_explicit(&g_fl_invalid, 1, memory_order_relaxed);
-                    if (shot < 8) {
-                        fprintf(stderr,
-                                "[UNIFIED_FREELIST_INVALID] cls=%d p=%p ss=%p slab=%d meta_used=%u tls_ss=%p tls_slab=%d cls_meta=%u\n",
-                                class_idx,
-                                p,
-                                (void*)fl_ss,
-                                fl_idx,
-                                m->used,
-                                (void*)tls->ss,
-                                tls->slab_idx,
-                                (unsigned)fl_cls);
-                    }
-                    // Drop invalid freelist to avoid SEGV and force slow refill
-                    m->freelist = NULL;
-                    p = NULL;
-                }
-            } while (0);
-            #endif
-            if (!p) {
-                break;
-            }
-
             void* next_node = tiny_next_read(class_idx, p);
 
             // ROOT CAUSE FIX: Write header BEFORE exposing block (but AFTER reading next)
diff --git a/core/front/tiny_unified_cache.h b/core/front/tiny_unified_cache.h
index 1b0b05e5..2c53cf89 100644
--- a/core/front/tiny_unified_cache.h
+++ b/core/front/tiny_unified_cache.h
@@ -57,7 +57,7 @@ static inline int unified_cache_measure_check(void) {
 // Unified Cache Structure (per class)
 // ============================================================================
 
-typedef struct {
+typedef struct __attribute__((aligned(64))) {
     // slots は BASE ポインタ群を保持する（ユーザポインタではない）。
     // API では hak_base_ptr_t で型安全に扱い、内部表現は void* のまま。
     void** slots;      // Dynamic array of BASE pointers (allocated at init)