--- libmalloc/libmalloc-792.80.2/src/xzone_malloc/xzone_malloc.c
+++ libmalloc/libmalloc-792.41.1/src/xzone_malloc/xzone_malloc.c
@@ -1102,10 +1102,9 @@
 #endif
 
 	// acquire to make sure the reclaim index is visible
-	// TODO This load can be made relaxed - we already performed the necessary
-	// acquire prior to this point when we marked the chunk as used, if we
-	// needed to do that (i.e. if deferred reclaim is enabled and this chunk was
-	// on the empty list => MADVISED)
+	// TODO make this load relaxed. the address of the reclaim index is derived
+	// from the chunk pointer that we popped from the list, and stores to the
+	// list are done with a release barrier
 	xzm_chunk_atomic_meta_u old_meta = {
 		.xca_value = os_atomic_load_wide(
 				&chunk->xzc_atomic_meta.xca_value, acquire),
@@ -1702,19 +1701,13 @@
 
 		bool was_reclaimed = true;
 #if CONFIG_XZM_DEFERRED_RECLAIM
-		if ((main->xzmz_defer_tiny && !small) ||
-				(main->xzmz_defer_small && small)) {
-			// We need to ensure that the reclaim ID update is visible before
-			// loading it - we are _not_ implicitly guaranteed that by it having
-			// come from the empty list because the thread that placed it on the
-			// empty list may have done so without itself having visibility on
-			// the ID update.  This acquire pairs with the release that stores
-			// the MADVISED state to the chunk.
-			os_atomic_thread_fence(acquire);
-			if (!xzm_chunk_mark_used(zone, chunk, &was_reclaimed)) {
-				// this chunk is busy so we can't use it
-				goto empty_busy;
-			}
+		// This relies on dependency ordering from the pop of the chunk
+		// list to obtain the correct reclaim buffer index
+		if (((main->xzmz_defer_tiny && !small) ||
+				(main->xzmz_defer_small && small)) &&
+				!xzm_chunk_mark_used(zone, chunk, &was_reclaimed)) {
+			// this chunk is busy so we can't use it
+			goto empty_busy;
 		}
 #endif // CONFIG_XZM_DEFERRED_RECLAIM
 
@@ -2157,6 +2150,8 @@
 				new_meta.xca_on_empty_list = true;
 			}
 			// release to publish the reclaim index if we stored one
+			// TODO make this store relaxed. the reclaim index is no longer
+			// set in this function
 			bool success = os_atomic_cmpxchgv(&chunk->xzc_atomic_meta.xca_value,
 					old_meta.xca_value, new_meta.xca_value, &old_meta.xca_value,
 					release);