On Wed, Apr 19, 2017 at 5:40 AM, Johnny Hughes <johnny at centos.org> wrote: > On 04/18/2017 12:39 PM, PJ Welsh wrote: > > Here is something interesting... I went through the BIOS options and > > found that one R710 that *is* functioning only differed in that "Logical > > Processor"/Hyperthreading was *enabled* while the one that is *not* > > functioning had HT *disabled*. Enabled Logical Processor and the system > > starts without issue! I've rebooted 3 times now without issue. > > Dell R710 BIOS version 6.4.0 > > 2x Intel(R) Xeon(R) CPU L5639 @ 2.13GHz > > 4.9.20-26.el7.x86_64 #1 SMP Tue Apr 4 11:19:26 CDT 2017 x86_64 x86_64 > > x86_64 GNU/Linux > > > > Outstanding .. I have now released a 4.9.23-26.el6 and .el7 to the > system as normal updates. It should be available later today. > > <snip> > > I've verified with a second Dell R710 that disabling Hyperthreading/Logical Processor causes the primary xen booting kernel to fail and reboot. Consequently, enabling allows for the system to start as expected and without any issue: Current tested kernel was: 4.9.13-22.el7.x86_64 #1 SMP Sun Feb 26 22:15:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux I just attempted an update and the 4.9.23-26 is not yet up. Does this update address the Hyperthreading issue in any way? Thanks PJ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20170419/3e9f5c99/attachment-0005.html>