thr3ads.net - CentOS virt - [CentOS-virt] Xen C6 kernel 4.9.13 and testing 4.9.15 only reboots. [Apr 2017]

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PJ Welsh

2017-Apr-18 13:36 UTC

[CentOS-virt] Xen C6 kernel 4.9.13 and testing 4.9.15 only reboots.

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 get back into being able to test this more.

Thanks
PJ

On Tue, Apr 18, 2017 at 8:30 AM, Johnny Hughes <johnny at centos.org>
wrote:
> 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 ramdisk ...
> > [    0.000000] Linux version 4.9.20-26.el7.x86_64 (mockbuild@) (gcc
> version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Apr 4 11:19:26
> CDT 2017
> >
> > <snip>
> >
> > [    6.195089] smpboot: Max logical packages: 1
> > [    6.199549] VPMU disabled by hypervisor.
> > [    6.203663] Performance Events: SandyBridge events, PMU not
available
> due to virtualization, using software events only.
> > [    6.215436] NMI watchdog: disabled (cpu0): hardware events not
enabled
> > [    6.222139] NMI watchdog: Shutting down hard lockup detector on all
> cpus
> > [    6.229165] installing Xen timer for CPU 1
> > [    6.233849] installing Xen timer for CPU 2
> > [    6.238504] installing Xen timer for CPU 3
> > [    6.243139] installing Xen timer for CPU 4
> > [    6.247836] installing Xen timer for CPU 5
> > [    6.252478] installing Xen timer for CPU 6
> > [    6.257155] installing Xen timer for CPU 7
> > [    6.261795] installing Xen timer for CPU 8
> > [    6.266358] smpboot: Package 1 of CPU 8 exceeds BIOS package data
1.
> > [    6.272736] ------------[ cut here ]------------
> > [    6.277358] kernel BUG at arch/x86/kernel/cpu/common.c:997!
> > [    6.280104] random: fast init done
> > [    6.286333] invalid opcode: 0000 [#1] SMP
> > [    6.290343] Modules linked in:
> > [    6.293430] CPU: 8 PID: 0 Comm: swapper/8 Not tainted
> 4.9.20-26.el7.x86_64 #1
> > [    6.300568] Hardware name: Supermicro X9DRT/X9DRT, BIOS 3.2a
> 08/04/2015
> > [    6.307183] task: ffff880058a68000 task.stack: ffffc900400c0000
> > [    6.313103] RIP: e030:[<ffffffff8103e7e7>] 
[<ffffffff8103e7e7>]
> identify_secondary_cpu+0x57/0x80
> > [    6.322019] RSP: e02b:ffffc900400c3f08  EFLAGS: 00010086
> > [    6.327333] RAX: 00000000ffffffe4 RBX: ffff88005d80a020 RCX:
> ffffffff81e5ffc8
> > [    6.334473] RDX: 0000000000000001 RSI: 0000000000000005 RDI:
> 0000000000000005
> > [    6.341607] RBP: ffffc900400c3f18 R08: 00000000000000ce R09:
> 0000000000000000
> > [    6.348738] R10: 0000000000000005 R11: 0000000000000006 R12:
> 0000000000000008
> > [    6.355873] R13: 0000000000000000 R14: 0000000000000000 R15:
> 0000000000000000
> > [    6.363006] FS:  0000000000000000(0000) GS:ffff88005d800000(0000)
> knlGS:0000000000000000
> > [    6.371090] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033
> > [    6.376837] CR2: 0000000000000000 CR3: 0000000001e07000 CR4:
> 0000000000042660
> > [    6.383970] Stack:
> > [    6.386004]  0000000000000008 0000000000000000 ffffc900400c3f28
> ffffffff8104ebce
> > [    6.393483]  ffffc900400c3f40 ffffffff81029855 0000000000000000
> ffffc900400c3f50
> > [    6.400963]  ffffffff810298d0 0000000000000000 0000000000000000
> 0000000000000000
> > [    6.408450] Call Trace:
> > [    6.410907]  [<ffffffff8104ebce>]
smp_store_cpu_info+0x3e/0x40
> > [    6.416753]  [<ffffffff81029855>] cpu_bringup+0x35/0x90
> > [    6.421981]  [<ffffffff810298d0>]
cpu_bringup_and_idle+0x20/0x40
> > [    6.427987] 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 e4 02 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 e8 ce ca 81
> > [    6.448249] RIP  [<ffffffff8103e7e7>]
identify_secondary_cpu+0x57/
> 0x80
> > [    6.454801]  RSP <ffffc900400c3f08>
> > [    6.458305] ---[ end trace 2f9b62c5c7050204 ]---
> >
> >
> > So basically, it removes the "[Firmware Bug]: CPU1: APIC id
mismatch.
> Firmware: 0 APIC: 1"  lines, but otherwise dies the same way. I
included a
> few extra lines up from the panic because the "[    6.195089] smpboot:
Max
> logical packages: 1" could possibly be relevant, I need to go look at
a
> clean boot to see if that was in there on this machine.
> >
> >
> > Even more strangely, in addition to the machine I'm talking about
which
> panics and reboots, I had a second nearly identical machine (different
> CPU/ram config, everything else the same) which booted but had some kind of
> hw conflict with 4.9.x that I never had before. It appears to be between
> Intel SCU and an intel PCIe NVMe SSD (luckily I wasn't using SCU, so I
> disabled that). Had that other machine not booted I would have just assumed
> 4.9.X was totally broken and sat on 3.18...so I'm glad that one machine
> booted at least :)
> >
> > Thanks,
> > -Dave
>
> Dave,
>
> Just for testing purposes, can you try booting the kernel in the normal
> way on the machine does does not work (a normal grub entry on the kernel
> with no xen.gz line)
>
> That way, we can hopefully narrow the issue down to a hypervisor issue
> or a kernel config issue.
>
> Thanks,
> Johnny Hughes
>
> >
> >
> >> On Apr 14, 2017, at 05:39, 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".
> >>>>
>
>
>
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> https://lists.centos.org/mailman/listinfo/centos-virt
>
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PJ Welsh

2017-Apr-18 13:39 UTC

head link

[CentOS-virt] Xen C6 kernel 4.9.13 and testing 4.9.15 only reboots.

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 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 get back into being able to test this more.
>
> Thanks
> PJ
>
> On Tue, Apr 18, 2017 at 8:30 AM, Johnny Hughes <johnny at centos.org>
wrote:
>
>> 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 ramdisk ...
>> > [    0.000000] Linux version 4.9.20-26.el7.x86_64 (mockbuild@)
(gcc
>> version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Apr 4
11:19:26
>> CDT 2017
>> >
>> > <snip>
>> >
>> > [    6.195089] smpboot: Max logical packages: 1
>> > [    6.199549] VPMU disabled by hypervisor.
>> > [    6.203663] Performance Events: SandyBridge events, PMU not
>> available due to virtualization, using software events only.
>> > [    6.215436] NMI watchdog: disabled (cpu0): hardware events not
>> enabled
>> > [    6.222139] NMI watchdog: Shutting down hard lockup detector on
all
>> cpus
>> > [    6.229165] installing Xen timer for CPU 1
>> > [    6.233849] installing Xen timer for CPU 2
>> > [    6.238504] installing Xen timer for CPU 3
>> > [    6.243139] installing Xen timer for CPU 4
>> > [    6.247836] installing Xen timer for CPU 5
>> > [    6.252478] installing Xen timer for CPU 6
>> > [    6.257155] installing Xen timer for CPU 7
>> > [    6.261795] installing Xen timer for CPU 8
>> > [    6.266358] smpboot: Package 1 of CPU 8 exceeds BIOS package
data 1.
>> > [    6.272736] ------------[ cut here ]------------
>> > [    6.277358] kernel BUG at arch/x86/kernel/cpu/common.c:997!
>> > [    6.280104] random: fast init done
>> > [    6.286333] invalid opcode: 0000 [#1] SMP
>> > [    6.290343] Modules linked in:
>> > [    6.293430] CPU: 8 PID: 0 Comm: swapper/8 Not tainted
>> 4.9.20-26.el7.x86_64 #1
>> > [    6.300568] Hardware name: Supermicro X9DRT/X9DRT, BIOS 3.2a
>> 08/04/2015
>> > [    6.307183] task: ffff880058a68000 task.stack: ffffc900400c0000
>> > [    6.313103] RIP: e030:[<ffffffff8103e7e7>] 
[<ffffffff8103e7e7>]
>> identify_secondary_cpu+0x57/0x80
>> > [    6.322019] RSP: e02b:ffffc900400c3f08  EFLAGS: 00010086
>> > [    6.327333] RAX: 00000000ffffffe4 RBX: ffff88005d80a020 RCX:
>> ffffffff81e5ffc8
>> > [    6.334473] RDX: 0000000000000001 RSI: 0000000000000005 RDI:
>> 0000000000000005
>> > [    6.341607] RBP: ffffc900400c3f18 R08: 00000000000000ce R09:
>> 0000000000000000
>> > [    6.348738] R10: 0000000000000005 R11: 0000000000000006 R12:
>> 0000000000000008
>> > [    6.355873] R13: 0000000000000000 R14: 0000000000000000 R15:
>> 0000000000000000
>> > [    6.363006] FS:  0000000000000000(0000)
GS:ffff88005d800000(0000)
>> knlGS:0000000000000000
>> > [    6.371090] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033
>> > [    6.376837] CR2: 0000000000000000 CR3: 0000000001e07000 CR4:
>> 0000000000042660
>> > [    6.383970] Stack:
>> > [    6.386004]  0000000000000008 0000000000000000 ffffc900400c3f28
>> ffffffff8104ebce
>> > [    6.393483]  ffffc900400c3f40 ffffffff81029855 0000000000000000
>> ffffc900400c3f50
>> > [    6.400963]  ffffffff810298d0 0000000000000000 0000000000000000
>> 0000000000000000
>> > [    6.408450] Call Trace:
>> > [    6.410907]  [<ffffffff8104ebce>]
smp_store_cpu_info+0x3e/0x40
>> > [    6.416753]  [<ffffffff81029855>] cpu_bringup+0x35/0x90
>> > [    6.421981]  [<ffffffff810298d0>]
cpu_bringup_and_idle+0x20/0x40
>> > [    6.427987] 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 e4 02 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 e8 ce ca
81
>> > [    6.448249] RIP  [<ffffffff8103e7e7>]
identify_secondary_cpu+0x57/0x
>> 80
>> > [    6.454801]  RSP <ffffc900400c3f08>
>> > [    6.458305] ---[ end trace 2f9b62c5c7050204 ]---
>> >
>> >
>> > So basically, it removes the "[Firmware Bug]: CPU1: APIC id
mismatch.
>> Firmware: 0 APIC: 1"  lines, but otherwise dies the same way. I
included a
>> few extra lines up from the panic because the "[    6.195089]
smpboot: Max
>> logical packages: 1" could possibly be relevant, I need to go look
at a
>> clean boot to see if that was in there on this machine.
>> >
>> >
>> > Even more strangely, in addition to the machine I'm talking
about which
>> panics and reboots, I had a second nearly identical machine (different
>> CPU/ram config, everything else the same) which booted but had some
kind of
>> hw conflict with 4.9.x that I never had before. It appears to be
between
>> Intel SCU and an intel PCIe NVMe SSD (luckily I wasn't using SCU,
so I
>> disabled that). Had that other machine not booted I would have just
assumed
>> 4.9.X was totally broken and sat on 3.18...so I'm glad that one
machine
>> booted at least :)
>> >
>> > Thanks,
>> > -Dave
>>
>> Dave,
>>
>> Just for testing purposes, can you try booting the kernel in the normal
>> way on the machine does does not work (a normal grub entry on the
kernel
>> with no xen.gz line)
>>
>> That way, we can hopefully narrow the issue down to a hypervisor issue
>> or a kernel config issue.
>>
>> Thanks,
>> Johnny Hughes
>>
>> >
>> >
>> >> On Apr 14, 2017, at 05:39, 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".
>> >>>>
>>
>>
>>
>> _______________________________________________
>> CentOS-virt mailing list
>> CentOS-virt at centos.org
>> https://lists.centos.org/mailman/listinfo/centos-virt
>>
>>
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PJ Welsh

2017-Apr-18 13:44 UTC

head link

[CentOS-virt] Xen C6 kernel 4.9.13 and testing 4.9.15 only reboots.

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:
> "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 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 get back into being able to test this more.
>>
>> Thanks
>> PJ
>>
>> On Tue, Apr 18, 2017 at 8:30 AM, Johnny Hughes <johnny at
centos.org> wrote:
>>
>>> 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 ramdisk ...
>>> > [    0.000000] Linux version 4.9.20-26.el7.x86_64 (mockbuild@)
(gcc
>>> version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Apr 4
11:19:26
>>> CDT 2017
>>> >
>>> > <snip>
>>> >
>>> > [    6.195089] smpboot: Max logical packages: 1
>>> > [    6.199549] VPMU disabled by hypervisor.
>>> > [    6.203663] Performance Events: SandyBridge events, PMU not
>>> available due to virtualization, using software events only.
>>> > [    6.215436] NMI watchdog: disabled (cpu0): hardware events
not
>>> enabled
>>> > [    6.222139] NMI watchdog: Shutting down hard lockup
detector on all
>>> cpus
>>> > [    6.229165] installing Xen timer for CPU 1
>>> > [    6.233849] installing Xen timer for CPU 2
>>> > [    6.238504] installing Xen timer for CPU 3
>>> > [    6.243139] installing Xen timer for CPU 4
>>> > [    6.247836] installing Xen timer for CPU 5
>>> > [    6.252478] installing Xen timer for CPU 6
>>> > [    6.257155] installing Xen timer for CPU 7
>>> > [    6.261795] installing Xen timer for CPU 8
>>> > [    6.266358] smpboot: Package 1 of CPU 8 exceeds BIOS
package data 1.
>>> > [    6.272736] ------------[ cut here ]------------
>>> > [    6.277358] kernel BUG at arch/x86/kernel/cpu/common.c:997!
>>> > [    6.280104] random: fast init done
>>> > [    6.286333] invalid opcode: 0000 [#1] SMP
>>> > [    6.290343] Modules linked in:
>>> > [    6.293430] CPU: 8 PID: 0 Comm: swapper/8 Not tainted
>>> 4.9.20-26.el7.x86_64 #1
>>> > [    6.300568] Hardware name: Supermicro X9DRT/X9DRT, BIOS
3.2a
>>> 08/04/2015
>>> > [    6.307183] task: ffff880058a68000 task.stack:
ffffc900400c0000
>>> > [    6.313103] RIP: e030:[<ffffffff8103e7e7>] 
[<ffffffff8103e7e7>]
>>> identify_secondary_cpu+0x57/0x80
>>> > [    6.322019] RSP: e02b:ffffc900400c3f08  EFLAGS: 00010086
>>> > [    6.327333] RAX: 00000000ffffffe4 RBX: ffff88005d80a020
RCX:
>>> ffffffff81e5ffc8
>>> > [    6.334473] RDX: 0000000000000001 RSI: 0000000000000005
RDI:
>>> 0000000000000005
>>> > [    6.341607] RBP: ffffc900400c3f18 R08: 00000000000000ce
R09:
>>> 0000000000000000
>>> > [    6.348738] R10: 0000000000000005 R11: 0000000000000006
R12:
>>> 0000000000000008
>>> > [    6.355873] R13: 0000000000000000 R14: 0000000000000000
R15:
>>> 0000000000000000
>>> > [    6.363006] FS:  0000000000000000(0000)
GS:ffff88005d800000(0000)
>>> knlGS:0000000000000000
>>> > [    6.371090] CS:  e033 DS: 002b ES: 002b CR0:
0000000080050033
>>> > [    6.376837] CR2: 0000000000000000 CR3: 0000000001e07000
CR4:
>>> 0000000000042660
>>> > [    6.383970] Stack:
>>> > [    6.386004]  0000000000000008 0000000000000000
ffffc900400c3f28
>>> ffffffff8104ebce
>>> > [    6.393483]  ffffc900400c3f40 ffffffff81029855
0000000000000000
>>> ffffc900400c3f50
>>> > [    6.400963]  ffffffff810298d0 0000000000000000
0000000000000000
>>> 0000000000000000
>>> > [    6.408450] Call Trace:
>>> > [    6.410907]  [<ffffffff8104ebce>]
smp_store_cpu_info+0x3e/0x40
>>> > [    6.416753]  [<ffffffff81029855>]
cpu_bringup+0x35/0x90
>>> > [    6.421981]  [<ffffffff810298d0>]
cpu_bringup_and_idle+0x20/0x40
>>> > [    6.427987] 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 e4 02 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 e8
ce ca 81
>>> > [    6.448249] RIP  [<ffffffff8103e7e7>]
identify_secondary_cpu+0x57/0x
>>> 80
>>> > [    6.454801]  RSP <ffffc900400c3f08>
>>> > [    6.458305] ---[ end trace 2f9b62c5c7050204 ]---
>>> >
>>> >
>>> > So basically, it removes the "[Firmware Bug]: CPU1: APIC
id mismatch.
>>> Firmware: 0 APIC: 1"  lines, but otherwise dies the same way.
I included a
>>> few extra lines up from the panic because the "[    6.195089]
smpboot: Max
>>> logical packages: 1" could possibly be relevant, I need to go
look at a
>>> clean boot to see if that was in there on this machine.
>>> >
>>> >
>>> > Even more strangely, in addition to the machine I'm
talking about
>>> which panics and reboots, I had a second nearly identical machine
>>> (different CPU/ram config, everything else the same) which booted
but had
>>> some kind of hw conflict with 4.9.x that I never had before. It
appears to
>>> be between Intel SCU and an intel PCIe NVMe SSD (luckily I
wasn't using
>>> SCU, so I disabled that). Had that other machine not booted I would
have
>>> just assumed 4.9.X was totally broken and sat on 3.18...so I'm
glad that
>>> one machine booted at least :)
>>> >
>>> > Thanks,
>>> > -Dave
>>>
>>> Dave,
>>>
>>> Just for testing purposes, can you try booting the kernel in the
normal
>>> way on the machine does does not work (a normal grub entry on the
kernel
>>> with no xen.gz line)
>>>
>>> That way, we can hopefully narrow the issue down to a hypervisor
issue
>>> or a kernel config issue.
>>>
>>> Thanks,
>>> Johnny Hughes
>>>
>>> >
>>> >
>>> >> On Apr 14, 2017, at 05:39, 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/msg010
>>> 69.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".
>>> >>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> CentOS-virt mailing list
>>> CentOS-virt at centos.org
>>> https://lists.centos.org/mailman/listinfo/centos-virt
>>>
>>>
>>
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