From bed0049a5118d7f02263225a54b083e7558ad20d Mon Sep 17 00:00:00 2001
From: "Jeff Washington (jwash)"
 <75863576+jeffwashington@users.noreply.github.com>
Date: Sat, 18 Sep 2021 09:56:26 -0500
Subject: [PATCH] AcctIdx: add age per item in in_mem acct idx (#19981)

---
 runtime/src/accounts_index.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/runtime/src/accounts_index.rs b/runtime/src/accounts_index.rs
index cf74cb5c75..f20cc061a8 100644
--- a/runtime/src/accounts_index.rs
+++ b/runtime/src/accounts_index.rs
@@ -25,7 +25,7 @@ use std::{
     },
     path::PathBuf,
     sync::{
-        atomic::{AtomicBool, AtomicU64, Ordering},
+        atomic::{AtomicBool, AtomicU64, AtomicU8, Ordering},
         Arc, Mutex, RwLock, RwLockReadGuard, RwLockWriteGuard,
     },
 };
@@ -127,12 +127,14 @@ impl AccountSecondaryIndexes {
 #[derive(Debug, Default)]
 pub struct AccountMapEntryMeta {
     pub dirty: AtomicBool,
+    pub age: AtomicU8,
 }
 
 impl AccountMapEntryMeta {
     pub fn new_dirty() -> Self {
         AccountMapEntryMeta {
             dirty: AtomicBool::new(true),
+            age: AtomicU8::default(),
         }
     }
 }