From 21fbc363119c2dd956581efe455c7fece4668e7b Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Sun, 20 Dec 2020 01:05:45 +0300
Subject: [PATCH] mdbx: minor refine `mdbx_page_retire()`.

Change-Id: I29d20ed47f56e17dde8c9417bfa1ec95302c1966
---
 src/core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/core.c b/src/core.c
index f6e07982..867e2ef1 100644
--- a/src/core.c
+++ b/src/core.c
@@ -4186,7 +4186,7 @@ static int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp) {
 
   if (txn->tw.spill_pages) {
     const unsigned i = mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1);
-    if (i) {
+    if (unlikely(i)) {
       /* This page is no longer spilled */
 #if MDBX_PNL_ASCENDING
       mdbx_tassert(txn, i == MDBX_PNL_SIZE(txn->tw.spill_pages) ||
@@ -4195,9 +4195,10 @@ static int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp) {
       mdbx_tassert(txn, i == 1 || txn->tw.spill_pages[i - 1] >= (pgno + npages)
                                                                     << 1);
 #endif
-      txn->tw.spill_pages[i] |= 1;
       if (i == MDBX_PNL_SIZE(txn->tw.spill_pages))
         MDBX_PNL_SIZE(txn->tw.spill_pages) -= 1;
+      else
+        txn->tw.spill_pages[i] |= 1;
       int rc = mdbx_page_loose(txn, mp);
       if (unlikely(rc != MDBX_SUCCESS))
         mc->mc_flags &= ~(C_INITIALIZED | C_EOF);