pr

accounts-db/src/accounts_db/tests.rs

@@ -8104,7 +8104,14 @@ fn test_clean_old_storages_with_reclaims_rooted() {
         );
         accounts_db.add_root_and_flush_write_cache(slot);
     }
-    // for this test, `new_slot` must not be in `dirty_stores`.
+    // For this test, `new_slot` must **not** be in `dirty_stores`. There are
+    // two ways to drive `clean`: 1) by "uncleaned" pubkeys, or 2) by "dirty"
+    // stores. This test is to simulate the case of normal bank rooting process
+    // to kick off clean. In normal bank rooting process, the "clean" is driven
+    // by computing the delta hash of the rooted slot. In computing delta hash,
+    // we directly pick up the pubkeys in the store and set them on
+    // `cleaned_pubkeys` for clean. We are *not* setting `dirty_store` for this
+    // case.
     assert!(!accounts_db.dirty_stores.contains_key(&new_slot));
 
     // ensure the slot list for `pubkey` has both the old and new slots