After upgrading approx. 50 machines to 7.4 we discovered a reproducible SegFault of one of our commercial programs we use. This SegFault does not occur on CentOS 7.3 and it occurs only on Xeon E3-1230 V3, Xeon E5-2690 and Xeon E5-2697 v2. It does NOT occur on Xeon E5-2697 v3 and Xeon E3-1231 v3, AMD Ryzen and older Core I7-9xx. It is not dependent of the kernel, we switched back to an CentOS 7.3 kernel and forward to an Linux 4.11 kernel without success. When we run CentOS 7.3 as a guest on CentOS 7.4 in VMWare on affected CPUs the Segmentation Fault does not occur. Is there any processor specific optimzation dependency on the 7.4 glibc or any libraries I don't know? And what to do against it? Thank you in advance! Gerhard Schneider -- Gerhard Schneider Institute of Lightweight Design and e-Mail: gs at ilsb.tuwien.ac.at Structural Biomechanics (E317) Tel.: +43 1 58801 31716 TU Wien / Vienna / Austria Fax: +43 1 58801 31799 A-1060 Wien, Getreidemarkt 9/BE02 http://www.ilsb.tuwien.ac.at/~gs/ -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 836 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20170915/4f040403/attachment-0004.sig>