kvm_queue_exception

kvm_queue_exception

[Thomas Mueller]

hi there

i was using kvm-70 and kernel 2.6.25 on debian lenny for two weeks 
without problems. processor is an AMD Opteron 2350.  now out of 
the nowwhere there is a problem with 1 of 4 guests (1x debian etch amd64, 
1x debian etch i386, 1x ubuntu 7.10 amd64, 1x ubuntu 7.10 i386)

On the host i see the following kernel  messages again and again... 
Rebooted the host and started all guests. Same 
problem again with only one guest (debian etch amd64 with kernel 2.6.25). 

Jul 16 19:17:03 cubalibre kernel: [ 9275.836932] ------------[ cut here ]------------
Jul 16 19:17:03 cubalibre kernel: [ 9275.836962] WARNING: at /usr/src/modules/kvm/x86.c:185 kvm_queue_exception_e+0x26/0x47 [kvm]()
Jul 16 19:17:03 cubalibre kernel: [ 9275.837022] Modules linked in: tun sbs ac battery wmi container sbshc video output nfs lockd nfs_acl sunrpc bridge ipv6 mptctl ipmi_poweroff ipmi_si ipmi_devintf ipmi_msghandler kvm_amd kvm bonding loop psmouse serio_raw pcspkr button i2c_piix4 shpchp pci_hotplug i2c_core dcdbas evdev ext3 jbd mbcache dm_mirror dm_snapshot dm_mod ide_cd_mod cdrom sd_mod sata_svw usbhid hid ff_memless ata_generic serverworks libata dock mptsas mptscsih mptbase scsi_transport_sas scsi_mod tg3 ehci_hcd ide_pci_generic ide_core ohci_hcd thermal processor fan
Jul 16 19:17:03 cubalibre kernel: [ 9275.837458] Pid: 5135, comm: kvm Not tainted 2.6.25-2-amd64 #1
Jul 16 19:17:03 cubalibre kernel: [ 9275.837491]
Jul 16 19:17:03 cubalibre kernel: [ 9275.837491] Call Trace:
Jul 16 19:17:03 cubalibre kernel: [ 9275.837544]  [<ffffffff80234ce5>] warn_on_slowpath+0x51/0x63
Jul 16 19:17:03 cubalibre kernel: [ 9275.837580]  [<ffffffff8022a56c>] hrtick_start_fair+0xfb/0x143
Jul 16 19:17:03 cubalibre kernel: [ 9275.837618]  [<ffffffff80230217>] hrtick_set+0x88/0xf7
Jul 16 19:17:03 cubalibre kernel: [ 9275.837652]  [<ffffffff8041f709>] error_exit+0x0/0x60
Jul 16 19:17:03 cubalibre kernel: [ 9275.837697]  [<ffffffff882118f0>] :kvm:gfn_to_hva+0x1c/0x40
Jul 16 19:17:03 cubalibre kernel: [ 9275.837742]  [<ffffffff88211a7b>] :kvm:kvm_read_guest_page+0x34/0x46
Jul 16 19:17:03 cubalibre kernel: [ 9275.837792]  [<ffffffff88214cd1>] :kvm:kvm_queue_exception_e+0x26/0x47
Jul 16 19:17:03 cubalibre kernel: [ 9275.837839]  [<ffffffff88237ddc>] :kvm_amd:handle_exit+0x9a/0x1ab
Jul 16 19:17:03 cubalibre kernel: [ 9275.837886]  [<ffffffff8821705b>] :kvm:kvm_arch_vcpu_ioctl_run+0x460/0x612
Jul 16 19:17:03 cubalibre kernel: [ 9275.837940]  [<ffffffff882129fb>] :kvm:kvm_vcpu_ioctl+0xf3/0x3a9
Jul 16 19:17:03 cubalibre kernel: [ 9275.837976]  [<ffffffff8027c8aa>] zone_statistics+0x3f/0x93
Jul 16 19:17:03 cubalibre kernel: [ 9275.838011]  [<ffffffff8027659e>] get_page_from_freelist+0x4a6/0x638
Jul 16 19:17:03 cubalibre kernel: [ 9275.838055]  [<ffffffff80276e13>] __alloc_pages+0x71/0x312
Jul 16 19:17:03 cubalibre kernel: [ 9275.838092]  [<ffffffff80281318>] handle_mm_fault+0x38b/0x893
Jul 16 19:17:03 cubalibre kernel: [ 9275.838134]  [<ffffffff8023e5c4>] recalc_sigpending+0xe/0x38
Jul 16 19:17:03 cubalibre kernel: [ 9275.838167]  [<ffffffff8023f80d>] dequeue_signal+0x8d/0x113
Jul 16 19:17:03 cubalibre kernel: [ 9275.838206]  [<ffffffff802a5b05>] vfs_ioctl+0x21/0x6b
Jul 16 19:17:03 cubalibre kernel: [ 9275.838239]  [<ffffffff802a5d97>] do_vfs_ioctl+0x248/0x261
Jul 16 19:17:03 cubalibre kernel: [ 9275.838274]  [<ffffffff8029ad84>] vfs_read+0x11e/0x152
Jul 16 19:17:03 cubalibre kernel: [ 9275.838308]  [<ffffffff802a5e01>] sys_ioctl+0x51/0x70
Jul 16 19:17:03 cubalibre kernel: [ 9275.838347]  [<ffffffff8020bd9a>] system_call_after_swapgs+0x8a/0x8f
Jul 16 19:17:03 cubalibre kernel: [ 9275.838385]
Jul 16 19:17:03 cubalibre kernel: [ 9275.838412] ---[ end trace 18dbdafc95bffe16 ]---
Jul 16 19:17:03 cubalibre kernel: [ 9275.838456] ------------[ cut here ]------------

kvm_stat output:

efer_reload                    0         0
exits                   26806018      2361
fpu_reload              17349000      1205
halt_exits               2938557       370
halt_wakeup               339616        29
host_state_reload       17697095      1245
hypercalls                     0         0
insn_emulation           7519074       753
insn_emulation_fail            0         0
invlpg                         0         0
io_exits                13196230       591
irq_exits                1593408       279
irq_window                     0         0
largepages                     0         0
mmio_exits               1445645       224
mmu_cache_miss               702         0
mmu_flooded                    0         0
mmu_pde_zapped                 0         0
mmu_pte_updated                0         0
mmu_pte_write              23000         0
mmu_recycled                   0         0
mmu_shadow_zapped              0         0
nmi_window                     0         0
pf_fixed                       0         0
pf_guest                       0         0
remote_tlb_flush               3         0
request_irq                    0         0
signal_exits                   4         0
tlb_flush                   1329         0

Maybe somehas any clue what's going on here?

Thank you.

Thomas

Re: kvm_queue_exception

[Thomas Mueller]

On Wed, 16 Jul 2008 17:28:41 +0000, Thomas Mueller wrote:

> hi there
> 
> i was using kvm-70 and kernel 2.6.25 on debian lenny for two weeks
> without problems. processor is an AMD Opteron 2350.  now out of the
> nowwhere there is a problem with 1 of 4 guests (1x debian etch amd64, 1x
> debian etch i386, 1x ubuntu 7.10 amd64, 1x ubuntu 7.10 i386)
> 
> On the host i see the following kernel  messages again and again...
> Rebooted the host and started all guests. Same problem again with only
> one guest (debian etch amd64 with kernel 2.6.25).

sorry i forgot: the guest is working, but there are short network outages.

Re: kvm_queue_exception

[Thomas Mueller]

On Wed, 16 Jul 2008 17:28:41 +0000, Thomas Mueller wrote:


> i was using kvm-70 and kernel 2.6.25 on debian lenny for two weeks
> without problems. processor is an AMD Opteron 2350.  now out of the
> nowwhere there is a problem with 1 of 4 guests (1x debian etch amd64, 1x
> debian etch i386, 1x ubuntu 7.10 amd64, 1x ubuntu 7.10 i386)
> 
> On the host i see the following kernel  messages again and again...
> Rebooted the host and started all guests. Same problem again with only
> one guest (debian etch amd64 with kernel 2.6.25).
> 


hmm... after disabling the ACPI daemon on the host, everything seems to 
be ok again. 

- Thomas