--- openjdk/jdk/src/solaris/classes/sun/nio/fs/LinuxFileStore.java	2017-08-23 11:40:26.690809603 +0200
+++ openjdk/jdk/src/solaris/classes/sun/nio/fs/LinuxFileStore.java	2017-08-23 11:44:28.314815334 +0200
@@ -74,8 +74,16 @@
             } catch (UnixException x) {
                 x.rethrowAsIOException(parent);
             }
-            if (attrs.dev() != dev())
-                break;
+            if (attrs.dev() != dev()) {
+
+                // step 3: lookup mounted file systems (use /proc/mounts to ensure we
+                // find the file system even when not in /etc/mtab)
+                byte[] dir = path.asByteArray();
+                for (UnixMountEntry entry: fs.getMountEntries("/proc/mounts")) {
+                    if (Arrays.equals(dir, entry.dir()))
+                        return entry;
+                }
+            }
             path = parent;
             parent = parent.getParent();
         }