WBThrottle: use fdatasync instead of fsync

Backport: dumpling
Signed-off-by: Samuel Just <sam.just@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/os/WBThrottle.cc b/src/os/WBThrottle.cc
index 23e24765cc2..8479b3c878d 100644
--- a/src/os/WBThrottle.cc
+++ b/src/os/WBThrottle.cc
@@ -145,7 +145,7 @@ void *WBThrottle::entry()
   while (get_next_should_flush(&wb)) {
     clearing = wb.get<0>();
     lock.Unlock();
-    ::fsync(**wb.get<1>());
+    ::fdatasync(**wb.get<1>());
     if (wb.get<2>().nocache)
       posix_fadvise(**wb.get<1>(), 0, 0, POSIX_FADV_DONTNEED);
     lock.Lock();