From f2f2cc3b40e61b3e60c8f79d137f865e1e64fd9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B5=D0=BE=D0=BD=D0=B8=D0=B4=20=D0=AE=D1=80=D1=8C?=
 =?UTF-8?q?=D0=B5=D0=B2=20=28Leonid=20Yuriev=29?= <leo@yuriev.ru>
Date: Fri, 7 Nov 2025 21:17:18 +0300
Subject: [PATCH] mdbx: add workaround for ext4 fast-commit bug.

---
 src/osal.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/osal.c b/src/osal.c
index 711a4477..ec823d32 100644
--- a/src/osal.c
+++ b/src/osal.c
@@ -1648,6 +1648,16 @@ int osal_fsetsize(mdbx_filehandle_t fd, const uint64_t length) {
     return MDBX_SUCCESS;
 #endif
 
+#if defined(__linux__) || defined(__gnu_linux__)
+  if (globals.linux_kernel_version < 0x05110000 && globals.linux_kernel_version >= 0x050a0000) {
+    struct statfs statfs_info;
+    if (fstatfs(fd, &statfs_info))
+      return errno;
+    if (statfs_info.f_type == 0xEF53 /* EXT4_SUPER_MAGIC */ && unlikely(fdatasync(fd)))
+      return errno;
+  }
+#endif /* Linux */
+
   return unlikely(ftruncate(fd, length)) ? errno : MDBX_SUCCESS;
 
 #endif /* !Windows */