From af6aa30c7c754324b526e68b0791b998dc841a3e Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Fri, 15 Nov 2019 11:09:15 +0300
Subject: [PATCH] mdbx: don't sync-on-close deleted files.

Change-Id: Ie9358dfd79c9c5b26777e690079b3f081f0a7158
---
 src/elements/core.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/elements/core.c b/src/elements/core.c
index cf8b4996..ce8376bf 100644
--- a/src/elements/core.c
+++ b/src/elements/core.c
@@ -9012,11 +9012,16 @@ int __cold mdbx_env_close_ex(MDBX_env *env, int dont_sync) {
       rc = mdbx_env_sync_ex(env, true, false);
       rc = (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc;
 #else
-      rc = mdbx_env_sync_ex(env, true, true);
-      rc = (rc == MDBX_BUSY || rc == EAGAIN || rc == EACCES || rc == EBUSY ||
-            rc == EWOULDBLOCK || rc == MDBX_RESULT_TRUE)
-               ? MDBX_SUCCESS
-               : rc;
+      struct stat st;
+      if (unlikely(fstat(env->me_fd, &st)))
+        rc = errno;
+      else if (st.st_nlink > 0 /* don't sync deleted files */) {
+        rc = mdbx_env_sync_ex(env, true, true);
+        rc = (rc == MDBX_BUSY || rc == EAGAIN || rc == EACCES || rc == EBUSY ||
+              rc == EWOULDBLOCK || rc == MDBX_RESULT_TRUE)
+                 ? MDBX_SUCCESS
+                 : rc;
+      }
 #endif
     }
   }