!70 【轻量级 PR】：update kernel/base/vm/los_vm_filemap.c.

Merge pull request !70 from 冷钦街/N/A

kernel/base/vm/los_vm_filemap.c

@@ -61,8 +61,8 @@ STATIC VOID OsPageCacheAdd(LosFilePage *page, struct page_mapping *mapping, VM_O
     }
 
     LOS_ListTailInsert(&mapping->page_list, &page->node);
-
-    OsSetPageLRU(page->vmPage);
+    //comment out code with no effect
+    //OsSetPageLRU(page->vmPage);
 
 done_add:
     mapping->nrpages++;