Just wanted to chime in that this bug also affected me - running OpenStack Juno w/KVM inside a KVM hypervisor.
CPU on the host machine is:
vendor_id : GenuineIntel
cpu family : 6
model : 58
model name : Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
running 14.04 with the latest packages applied as of today (2015-03-27) for both the host and the guest.
Lockup appeared to happen with one host-guest VM after I altered the number of CPUs allocated to another VM (yet to reboot that VM for changes to take affect), though I had also recently booted a new host-guest-guest VM.
I've got to keep working to get this environment up for a test, but if any specific logs or tests can be helpful, let me know and I'll see what I can provide.
Hi,
Just wanted to chime in that this bug also affected me - running OpenStack Juno w/KVM inside a KVM hypervisor.
CPU on the host machine is:
vendor_id : GenuineIntel
cpu family : 6
model : 58
model name : Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
running 14.04 with the latest packages applied as of today (2015-03-27) for both the host and the guest.
Lockup appeared to happen with one host-guest VM after I altered the number of CPUs allocated to another VM (yet to reboot that VM for changes to take affect), though I had also recently booted a new host-guest-guest VM.
ar 27 15:12:43 compute ntpd[1775]: peers refreshed iscsi snd_hda_intel cirrus snd_hda_codec ttm snd_hwdep drm_kms_helper snd_pcm drm snd_page_alloc snd_ ffffffff810dbf5 6>] [<ffffffff810db f56>] generic_ exec_single+ 0x86/0xb0 6e5c00 EFLAGS: 00000202 0(0000) GS:ffff88023fd4 0000(0000) knlGS:000000000 0000000 7a0>] ? leave_mm+0x80/0x80 065>] smp_call_ function_ single+ 0xe5/0x190 7a0>] ? leave_mm+0x80/0x80 21a>] ? kvm_handle_ hva_range+ 0x11a/0x180 [kvm] 300>] ? rmap_write_ protect+ 0x80/0x80 [kvm] 496>] smp_call_ function_ many+0x286/ 0x2d0 7a0>] ? leave_mm+0x80/0x80 8f7>] native_ flush_tlb_ others+ 0x37/0x40 bf6>] flush_tlb_ page+0x56/ 0xa0 4c8>] ptep_clear_ flush+0x48/ 0x60 d9f>] try_to_ merge_with_ ksm_page+ 0x14f/0x650 e36>] ksm_do_ scan+0xb96/ 0xdb0 0cf>] ksm_scan_ thread+ 0x7f/0x200 100>] ? prepare_ to_wait_ event+0x100/ 0x100 050>] ? ksm_do_ scan+0xdb0/ 0xdb0 592>] kthread+0xd2/0xf0 4c0>] ? kthread_ create_ on_node+ 0x1c0/0x1c0 ccc>] ret_from_ fork+0x7c/ 0xb0 4c0>] ? kthread_ create_ on_node+ 0x1c0/0x1c0
Mar 27 15:12:43 compute ntpd[1775]: new interface(s) found: waking up resolver
Mar 27 15:12:48 compute dnsmasq-dhcp[2044]: DHCPDISCOVER(br100) fa:16:3e:c3:81:22
Mar 27 15:12:48 compute dnsmasq-dhcp[2044]: DHCPOFFER(br100) 203.0.113.27 fa:16:3e:c3:81:22
Mar 27 15:12:48 compute dnsmasq-dhcp[2044]: DHCPREQUEST(br100) 203.0.113.27 fa:16:3e:c3:81:22
Mar 27 15:12:48 compute dnsmasq-dhcp[2044]: DHCPACK(br100) 203.0.113.27 fa:16:3e:c3:81:22 test03
Mar 27 15:15:40 compute kernel: [ 436.100002] BUG: soft lockup - CPU#5 stuck for 23s! [ksmd:68]
Mar 27 15:15:40 compute kernel: [ 436.100002] Modules linked in: vhost_net vhost macvtap macvlan xt_CHECKSUM ebt_ip ebt_arp ebtable_filter br
idge stp llc xt_conntrack xt_nat xt_tcpudp iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip6tabl
e_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables nbd ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_
tcp libiscsi_tcp libiscsi scsi_transport_
timer syscopyarea snd sysfillrect soundcore sysimgblt dm_multipath i2c_piix4 kvm_intel scsi_dh serio_raw kvm mac_hid lp parport 8139too psmous
e 8139cp mii floppy pata_acpi
Mar 27 15:15:40 compute kernel: [ 436.100002] CPU: 5 PID: 68 Comm: ksmd Not tainted 3.13.0-46-generic #79-Ubuntu
Mar 27 15:15:40 compute kernel: [ 436.100002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Mar 27 15:15:40 compute kernel: [ 436.100002] task: ffff8802306db000 ti: ffff8802306e4000 task.ti: ffff8802306e4000
Mar 27 15:15:40 compute kernel: [ 436.100002] RIP: 0010:[<
Mar 27 15:15:40 compute kernel: [ 436.100002] RSP: 0018:ffff880230
Mar 27 15:15:40 compute kernel: [ 436.100002] RAX: 0000000000000006 RBX: ffff8802306e5bd0 RCX: 0000000000000005
Mar 27 15:15:40 compute kernel: [ 436.100002] RDX: ffffffff8180ade0 RSI: 0000000000000000 RDI: 0000000000000286
Mar 27 15:15:40 compute kernel: [ 436.100002] RBP: ffff8802306e5c30 R08: ffffffff8180adc8 R09: ffff880232989b48
Mar 27 15:15:40 compute kernel: [ 436.100002] R10: 0000000000000867 R11: 0000000000000000 R12: 0000000000000000
Mar 27 15:15:40 compute kernel: [ 436.100002] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Mar 27 15:15:40 compute kernel: [ 436.100002] FS: 000000000000000
Mar 27 15:15:40 compute kernel: [ 436.100002] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Mar 27 15:15:40 compute kernel: [ 436.100002] CR2: 00007fb0557bf000 CR3: 0000000036b7d000 CR4: 00000000000026e0
Mar 27 15:15:40 compute kernel: [ 436.100002] Stack:
Mar 27 15:15:40 compute kernel: [ 436.100002] ffff88023fd13f80 0000000000000004 0000000000000005 ffffffff81d14300
Mar 27 15:15:40 compute kernel: [ 436.100002] ffffffff8105c7a0 ffff88023212c380 ffff8802306e5ca8 ffffffff810dc065
Mar 27 15:15:40 compute kernel: [ 436.100002] 00000000000134c0 00000000000134c0 ffff88023fd13f80 ffff88023fd13f80
Mar 27 15:15:40 compute kernel: [ 436.100002] Call Trace:
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8105c
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff810dc
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8105c
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffffa008c
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffffa008f
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff810dc
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8105c
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8105c
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8105c
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8118a
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8119c
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8119d
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8119e
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff810ab
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8119e
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8108b
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8108b
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff81731
Mar 27 15:15:40 compute kernel: [ 436.100002] [<ffffffff8108b
Mar 27 15:15:40 compute kernel: [ 436.100002] Code: 4c 89 23 48 89 4b 08 48 89 19 48 89 55 d0 e8 f2 d1 64 00 4c 3b 65 d0 74 23 45 85 ed 75 09
eb 0d 0f 1f 44 00 00 f3 90 f6 43 20 01 <75> f8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 44 89 f7 ff
Mar 27 15:16:08 compute kernel: [ 464.100002] BUG: soft lockup - CPU#5 stuck for 23s! [ksmd:68]
I've got to keep working to get this environment up for a test, but if any specific logs or tests can be helpful, let me know and I'll see what I can provide.