HiCache Storage: generate hash when inserting new nodes (#9053)

python/sglang/srt/mem_cache/radix_cache.py

@@ -62,6 +62,7 @@ class TreeNode:
         self.host_value: Optional[torch.Tensor] = None
         # store hash values of each pages
         self.hash_value: Optional[List[str]] = None
+        self.backuped_storage = False
 
         self.id = TreeNode.counter if id is None else id
         TreeNode.counter += 1
@@ -74,10 +75,6 @@ class TreeNode:
     def backuped(self):
         return self.host_value is not None
 
-    @property
-    def backuped_storage(self):
-        return self.hash_value is not None and len(self.hash_value) > 0
-
     def protect_host(self):
         """Protect the host value from eviction."""
         self.host_ref_counter += 1