From c6b2b2f98a629f768a455341d5f84c373d395488 Mon Sep 17 00:00:00 2001
From: Minglei Jin <mljin@taosdata.com>
Date: Sat, 16 Jul 2022 19:37:17 +0800
Subject: [PATCH] fix: return 0 if page's already dirty

---
 source/libs/tdb/src/db/tdbPager.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/source/libs/tdb/src/db/tdbPager.c b/source/libs/tdb/src/db/tdbPager.c
index 60eaf467ae..516804cad9 100644
--- a/source/libs/tdb/src/db/tdbPager.c
+++ b/source/libs/tdb/src/db/tdbPager.c
@@ -174,6 +174,13 @@ int tdbPagerWrite(SPager *pPager, SPage *pPage) {
   for (ppPage = &pPager->pDirty; (*ppPage) && TDB_PAGE_PGNO(*ppPage) < TDB_PAGE_PGNO(pPage);
        ppPage = &((*ppPage)->pDirtyNext)) {
   }
+
+  if (*ppPage && TDB_PAGE_PGNO(*ppPage) == TDB_PAGE_PGNO(pPage)) {
+    tdbUnrefPage(pPage);
+
+    return 0;
+  }
+
   ASSERT(*ppPage == NULL || TDB_PAGE_PGNO(*ppPage) > TDB_PAGE_PGNO(pPage));
   pPage->pDirtyNext = *ppPage;
   *ppPage = pPage;