Sure it is SLES11-SP4 ? latest SLES11-SP4 kernel is 3.0.101-108.35.1 The version 4.4.21-69 looks like SLES12-SP2 GA the fix went in with version >= 4.4.38-93.1, latest version is 4.4.114-92.67.1 .... so just applying updates will help already or did i missed something ?