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Sad to say that I already tested 4.9.20-26 from your repo yesterday...it does look a little cleaner before it dies, but still dies. I have not tested it with the vcpu=4 wokaround, but I can tonight if you would like. Relevant bits below: Loading Xen 4.6.3-12.el7 ... Loading Linux 4.9.20-26.el7.x86_64 ... Loading initial ramdisk ... [ 0.000000] Linux version 4.9.20-26.el7.x86_64 (mockbuild@)

There was a note that the non-Xen kernel at the same kernel version did indeed boot: "CentOS-6 4.9.20-26 kernel exhibits the same constant kernel-start-then-reboot issue when booting under the "CentOS Linux, with Xen hypervisor" grub2 menu option. However, it *does* properly boot under the "CentOS Linux (4.9.20-25.el7.x86_64) 7 (Core)" grub2 menu option!" Trying to

Apologies: I installed the newer -26 kernel and had not rebooted into it. The grub2 menu item should have been "CentOS Linux (4.9.20-25.el7.x86_64) 7 (Core)". I am currently restarting that remote affected system (unmodified grub2 entry first). Thanks PJ On Tue, Apr 18, 2017 at 8:39 AM, PJ Welsh <pjwelsh at gmail.com> wrote: > Just to note, the same pattern happens on C7: >

On 04/14/2017 03:26 PM, Anderson, Dave wrote: > Sad to say that I already tested 4.9.20-26 from your repo yesterday...it does look a little cleaner before it dies, but still dies. I have not tested it with the vcpu=4 wokaround, but I can tonight if you would like. Relevant bits below: > > Loading Xen 4.6.3-12.el7 ... > Loading Linux 4.9.20-26.el7.x86_64 ... > Loading initial

So, strangely, I have two _identical_ dualproc xeon mobos (same bios/ipmi versions, they even share an enclosure, one is right side, other is left), each with different cpu/memory: Using 4.9.13 with vcpu limited to 4, early in the boot process, the one that _was_ booting before setting the xen vcpu args says: "[ 7.060720] smpboot: Max logical packages: 2", and the other one says

Just to note, the same pattern happens on C7: "CentOS Linux, with Xen hypervisor" = reboot "CentOS Linux (4.9.20-26.el7.x86_64) 7 (Core)" = boot [root at XXX ~]# uname -a Linux XXX 4.9.20-25.el7.x86_64 #1 SMP Fri Mar 31 08:53:28 CDT 2017 x86_64 x86_64 x86_64 On Tue, Apr 18, 2017 at 8:36 AM, PJ Welsh <pjwelsh at gmail.com> wrote: > There was a note that the non-Xen

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)

List moderator: feel free to delete my previous large message with attachments that's in the moderation queue...it's now obsolete anyway. I have found a fix/workaround for my reboot issues with Xen 4.6.3-12 + Kernel 4.9.13: Once I finally got serial output all the way through the boot process (xen+dom0) I discovered the stack trace: [Firmware Bug]: CPU7: APIC id mismatch. Firmware: 0