From 45552d271ac70ab4aad07b1ca04eabe5da73a43b Mon Sep 17 00:00:00 2001
From: "Jeff Washington (jwash)"
 <75863576+jeffwashington@users.noreply.github.com>
Date: Thu, 20 May 2021 19:50:58 -0500
Subject: [PATCH] take mutex once in process_dead_slots (#17357)

---
 runtime/src/accounts_db.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/runtime/src/accounts_db.rs b/runtime/src/accounts_db.rs
index 55084f347d..2aee0280db 100644
--- a/runtime/src/accounts_db.rs
+++ b/runtime/src/accounts_db.rs
@@ -1895,8 +1895,11 @@ impl AccountsDb {
 
         // If the slot is dead, remove the need to shrink the storages as
         // the storage entries will be purged.
-        for slot in dead_slots {
-            self.shrink_candidate_slots.lock().unwrap().remove(slot);
+        {
+            let mut list = self.shrink_candidate_slots.lock().unwrap();
+            for slot in dead_slots {
+                list.remove(slot);
+            }
         }
 
         debug!(