os/WBThrottle: added check of return value for posix_fadvise()

check the return value of posix_fadvise() in WBThrottle::entry()

Signed-off-by: Xing Lin <xinglin@cs.utah.edu>

diff --git a/src/os/WBThrottle.cc b/src/os/WBThrottle.cc
index 9430c4fd3cde425075d3c0e5e04901bf8572ad0c..d71583958c658dbe1838cea77e53ad0fc4b37f30 100644 (file)
--- a/src/os/WBThrottle.cc
+++ b/src/os/WBThrottle.cc
@@ -149,8 +149,10 @@ void *WBThrottle::entry()
     lock.Unlock();
     ::fdatasync(**wb.get<1>());
 #ifdef HAVE_POSIX_FADVISE
-    if (wb.get<2>().nocache)
-      posix_fadvise(**wb.get<1>(), 0, 0, POSIX_FADV_DONTNEED);
+    if (wb.get<2>().nocache) {
+      int fa_r = posix_fadvise(**wb.get<1>(), 0, 0, POSIX_FADV_DONTNEED);
+      assert(fa_r == 0);
+    }
 #endif
     lock.Lock();
     clearing = ghobject_t();