I am on holiday until Sunday, but will download the kernel now and test it when I get back into work. Thanks On Fri, Apr 14, 2017 at 7:39 AM, Johnny Hughes <johnny at centos.org> wrote: > Dave, > > Take a look at this kernel as it is the one I think we are going to > release (or a slightly newer 4.9.2x from kernel.org LTS). This version > has some newer settings that are more redhat/fedora/centos base kernel > like WRT what is a module and what is built into the kernel, etc. > > https://people.centos.org/hughesjr/4.9.x/ > > Thanks, > Johnny Hughes > > On 04/14/2017 05:16 AM, Anderson, Dave wrote: > > 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 APIC: 7 > > installing Xen timer for CPU 8 > > [Firmware Bug]: CPU8: APIC id mismatch. Firmware: 0 APIC: 20 > > smpboot: Package 1 of CPU 8 exceeds BIOS package data 1. > > ------------[ cut here ]------------ > > kernel BUG at arch/x86/kernel/cpu/common.c:997! > > invalid opcode: 0000 [#1] SMP > > Modules linked in: > > CPU: 8 PID: 0 Comm: swapper/8 Not tainted 4.9.13-22.el7.x86_64 #1 > > Hardware name: Supermicro X9DRT/X9DRT, BIOS 3.2a 08/04/2015 > > random: fast init done > > task: ffff880058a8c4c0 task.stack: ffffc900400b4000 > > RIP: e030:[<ffffffff8103e527>] [<ffffffff8103e527>] > identify_secondary_cpu+0x57/0x80 > > RSP: e02b:ffffc900400b7f08 EFLAGS: 00010086 > > RAX: 00000000ffffffe4 RBX: ffff88005d80a020 RCX: ffffffff81c5be68 > > RDX: 0000000000000001 RSI: 0000000000000005 RDI: 0000000000000005 > > RBP: ffffc900400b7f18 R08: 00000000000000cb R09: 0000000000000004 > > R10: 0000000000000000 R11: 0000000000000006 R12: 0000000000000008 > > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > > FS: 0000000000000000(0000) GS:ffff88005d800000(0000) > knlGS:0000000000000000 > > CS: e033 DS: 002b ES: 002b CR0: 0000000080050033 > > CR2: 0000000000000000 CR3: 0000000001c07000 CR4: 0000000000042660 > > Stack: > > 0000000000000008 0000000000000000 ffffc900400b7f28 ffffffff8104e94e > > ffffc900400b7f40 ffffffff81029925 0000000000000000 ffffc900400b7f50 > > ffffffff810299a0 0000000000000000 0000000000000000 0000000000000000 > > Call Trace: > > [<ffffffff8104e94e>] smp_store_cpu_info+0x3e/0x40 > > [<ffffffff81029925>] cpu_bringup+0x35/0x90 > > [<ffffffff810299a0>] cpu_bringup_and_idle+0x20/0x40 > > Code: 44 89 e7 ff 50 68 0f b7 93 d2 00 00 00 39 d0 75 1c 0f b7 bb da 00 > 00 00 44 89 e6 e8 24 03 01 00 85 c0 75 07 5b 41 5c 5d c3 0f 0b <0f> 0b 0f > b7 8b d4 00 00 00 89 c2 44 89 e6 48 c7 c7 98 87 a6 81 > > RIP [<ffffffff8103e527>] identify_secondary_cpu+0x57/0x80 > > RSP <ffffc900400b7f08> > > ---[ end trace dc5563100443876e ]--- > > > > I surmised that reducing the number of dom0 vcpu might solve this issue > (they were unbounded) > > > > In testing adding "dom0_max_vcpus=4 dom0_vcpus_pin" to the > GRUB_CMDLINE_XEN_DEFAULT line in /etc/defaults/grub and re-running > grub2-mkconfig has resulted in the system I have that never booted Xen > 4.6.3-12 + Kernel 4.9.13, booting every single time out of 5-10 tests. > > > > > > So...I don't know if there's a race condition somewhere, or > what...but...so far this workaround has not failed me. > > > > Thanks, > > -Dave > > > > > > > >> On Fri, Apr 7, 2017 at 6:58 AM, PJ Welsh <pjwelsh at gmail.com > >>> wrote: > >>> I've not gotten any bites from my posting on the xen-devel mailing > list. > >>> Here is the only one to-date: > >>> https://lists.xen.org/archives/html/xen-devel/2017-04/msg01069.html > >>> > >>> From that email, there needs to be some hypervisor messages. > >>> > >>> Does anyone know how to produce the hypervisor messages? I've already > >> > >>> removed the rhgb and quiet options from the boot. > >> > >>> > >>> Thanks > >>> PJ > >> > >> > >> I spoke too soon. To get more information: Please see > >> > >> https://wiki.xenproject.org/wiki/Reporting_Bugs_against_Xen_Project > >> > >> and > >> > >> https://wiki.xenproject.org/wiki/Xen_Serial_Console > >> > >> or alternatively at least add "vga=keep". > >> > >> pjwelsh > > > > > > _______________________________________________ > > CentOS-virt mailing list > > CentOS-virt at centos.org > > https://lists.centos.org/mailman/listinfo/centos-virt > > > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20170414/661ba975/attachment-0005.html>