@Serge, A workaround for me is to use "hypervisor default" in virt-
manager. I'm not sure what the equivalent is in virt-install, but maybe
using --cpu=host-model-only would be a workaround?
>From the man page:
Expose the host CPUs configuration to the guest. This enables
the guest to take advantage of many
of the host CPUs features (better performance), but may cause
issues if migrating the guest to a
host without an identical CPU.
--cpu host-model-only
Expose the nearest host CPU model configuration to the guest.
It is the best CPU which can be
used for a guest on any of the hosts.
Use --cpu=? to see a list of all available sub options. Complete
details at
<http://libvirt.org/formatdomain.html#elementsCPU>
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https://bugs.launchpad.net/bugs/1524069
Title:
[Xenial] KVM trusty guest 3.13.0-68 raid6-pq panic in
raid6_avx21_gen_syndrome() while probing grub devices [was: Xenial
KVM: updating Trusty guest from 3.13.0-68 to 3.13.0-71 causes kernel
exception]
Status in kvm package in Ubuntu:
Confirmed
Status in linux package in Ubuntu:
Confirmed
Bug description:
The symptom I saw was this (note the segfault, and apt-get upgrade
hangs after this):
Setting up linux-image-3.13.0-71-generic (3.13.0-71.114) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal
3.13.0-71-generic /boot/vmlinuz-3.13.0-71-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-71-generic
/boot/vmlinuz-3.13.0-71-generic
update-initramfs: Generating /boot/initrd.img-3.13.0-71-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 3.13.0-71-generic
/boot/vmlinuz-3.13.0-71-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.13.0-71-generic
/boot/vmlinuz-3.13.0-71-generic
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is
set is no longer supported.
Found linux image: /boot/vmlinuz-3.13.0-71-generic
Found initrd image: /boot/initrd.img-3.13.0-71-generic
Found linux image: /boot/vmlinuz-3.13.0-68-generic
Found initrd image: /boot/initrd.img-3.13.0-68-generic
Segmentation fault
done
Setting up linux-firmware (1.127.19) ...
Setting up linux-image-extra-3.13.0-71-generic (3.13.0-71.114) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal
3.13.0-71-generic /boot/vmlinuz-3.13.0-71-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-71-generic
/boot/vmlinuz-3.13.0-71-generic
update-initramfs: Generating /boot/initrd.img-3.13.0-71-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 3.13.0-71-generic
/boot/vmlinuz-3.13.0-71-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.13.0-71-generic
/boot/vmlinuz-3.13.0-71-generic
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is
set is no longer supported.
Found linux image: /boot/vmlinuz-3.13.0-71-generic
Found initrd image: /boot/initrd.img-3.13.0-71-generic
Found linux image: /boot/vmlinuz-3.13.0-68-generic
Found initrd image: /boot/initrd.img-3.13.0-68-generic
In dmesg, I saw a corresponding kernel stack trace:
[ 522.649091] SGI XFS with ACLs, security attributes, realtime, large
block/inode numbers, no debug enabled
[ 522.654031] JFS: nTxBlock = 8192, nTxLock = 65536
[ 522.660515] NTFS driver 2.1.30 [Flags: R/O MODULE].
[ 522.672519] QNX4 filesystem 0.2.3 registered.
[ 522.677257] xor: measuring software checksum speed
[ 522.715613] prefetch64-sse: 17306.000 MB/sec
[ 522.755589] generic_sse: 16039.000 MB/sec
[ 522.755590] xor: using function: prefetch64-sse (17306.000 MB/sec)
[ 522.823619] raid6: sse2x1 10481 MB/s
[ 522.891614] raid6: sse2x2 13303 MB/s
[ 522.959616] raid6: sse2x4 15209 MB/s
[ 522.963634] invalid opcode: 0000 [#1] SMP
[ 522.963645] Modules linked in: raid6_pq(+) xor ufs qnx4 hfsplus hfs minix
ntfs msdos jfs xfs libcrc32c ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT
xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables
iptable_filter ip_tables ebtable_nat ebtables x_tables snd_hda_intel
snd_hda_codec snd_hwdep qxl snd_pcm kvm_intel ttm snd_page_alloc kvm
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel drm_kms_helper snd_timer
aesni_intel snd aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd drm
soundcore lp parport serio_raw i2c_piix4 mac_hid pata_acpi floppy psmouse
[ 522.963746] CPU: 2 PID: 11288 Comm: modprobe Not tainted 3.13.0-68-generic
#111-Ubuntu
[ 522.963751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 522.963755] task: ffff880059363000 ti: ffff88005dec6000 task.ti:
ffff88005dec6000
[ 522.963759] RIP: 0010:[<ffffffffa049dd0a>] [<ffffffffa049dd0a>]
raid6_avx21_gen_syndrome+0x4a/0x160 [raid6_pq]
[ 522.963767] RSP: 0018:ffff88005dec7c40 EFLAGS: 00010246
[ 522.963771] RAX: 0000000000000000 RBX: ffff88005dec7c88 RCX:
ffff880059363000
[ 522.963774] RDX: 0000000000000000 RSI: 0000000000000080 RDI:
0000000000000012
[ 522.963778] RBP: ffff88005dec7c70 R08: 0000000000000086 R09:
000000000000025f
[ 522.963781] R10: 0000000000000000 R11: ffff88005dec79ae R12:
0000000000001000
[ 522.963785] R13: ffff880043a42000 R14: ffff880043a43000 R15:
0000000000000012
[ 522.963789] FS: 00007fa330823740(0000) GS:ffff88007fd00000(0000)
knlGS:0000000000000000
[ 522.963793] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 522.963796] CR2: 00007fa330623000 CR3: 0000000036acf000 CR4:
00000000001006e0
[ 522.963801] Stack:
[ 522.963803] 0000000000000080 ffffffffa049e238 ffffffffa04b0720
ffff880043a42000
[ 522.963810] 0000000000003cd7 000000010000d992 ffff88005dec7d40
ffffffffa00d20fb
[ 522.963817] 0000000000000000 ffffffffa04a0600 ffffffffa04a1600
ffffffffa04a2600
[ 522.963824] Call Trace:
[ 522.963838] [<ffffffffa00d20fb>] init_module+0xfb/0x1000 [raid6_pq]
[ 522.963843] [<ffffffffa00d2000>] ? 0xffffffffa00d1fff
[ 522.963849] [<ffffffff8100214a>] do_one_initcall+0xfa/0x1b0
[ 522.963854] [<ffffffff81059903>] ? set_memory_nx+0x43/0x50
[ 522.963859] [<ffffffff810e29bd>] load_module+0x12dd/0x1b40
[ 522.963863] [<ffffffff810de440>] ? store_uevent+0x40/0x40
[ 522.963868] [<ffffffff810e3396>] SyS_finit_module+0x86/0xb0
[ 522.963873] [<ffffffff81734cdd>] system_call_fastpath+0x1a/0x1f
[ 522.963876] Code: 00 00 00 00 53 48 89 d3 48 83 ec 08 48 89 75 d0 4c 8b 2c
c2 4c 8b 74 32 08 e8 13 f9 b7 e0 84 c0 0f 84 f1 00 00 00 e8 c6 f9 b7 e0 <c5> fd
6f 05 ee 2a 01 00 c5 e5 ef db 4d 85 e4 0f 84 c0 00 00 00
[ 522.963940] RIP [<ffffffffa049dd0a>] raid6_avx21_gen_syndrome+0x4a/0x160
[raid6_pq]
[ 522.963946] RSP <ffff88005dec7c40>
[ 522.963949] ---[ end trace 7324d498bc862f81 ]---
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-68-generic 3.13.0-68.111
ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
Uname: Linux 3.13.0-68-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version
k3.13.0-68-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
'/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c',
'/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Date: Tue Dec 8 13:08:13 2015
HibernationDevice: RESUME=UUID=69fc2e53-278d-40ca-8109-64f826a073e7
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 qxldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-68-generic
root=UUID=897d5dd8-599e-42f9-a081-96f73cef59d9 ro splash quiet vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-68-generic N/A
linux-backports-modules-3.13.0-68-generic N/A
linux-firmware 1.127.19
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-wily
dmi.modalias:
dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-wily
dmi.sys.vendor: QEMU
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