Update S3FIFO.c

Author: 1a1a11a

libCacheSim/cache/eviction/S3FIFO.c

@@ -267,8 +267,8 @@ static cache_obj_t *S3FIFO_insert(cache_t *cache, const request_t *req) {
     /* insert into small fifo */
     // NOTE: Inserting an object whose size equals the size of small fifo is
     // NOT allowed. Doing so would completely fill the small fifo, causing all
-    // existing objects in small fifo to be evicted. This scenario can occur
-    // frequently and is undesirable.
+    // objects in small fifo to be evicted. This scenario may occur
+    // when using a tiny cache size.
     if (req->obj_size >= small_fifo->cache_size) {
       return NULL;
     }