Hi,
during normal use of kvm-userspace
ccabb53f1a84f11896c840391f7ade3756214086 with kernel modules from
b34cc415c4d1b547d0482f774a81370aecf4fc85 on a 2.6.25 OpenSUSE kernel I
just got this oops:
BUG: unable to handle kernel paging request at ffffc20005261808
IP: [<ffffffff8883fcec>] :kvm:is_largepage_backed+0x2f/0xe7
PGD 7f23b067 PUD 7f23c067 PMD 7d7bb067 PTE 0
Oops: 0000 [1] SMP
last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
CPU 1
Modules linked in: ath_pci o2scr kvm_intel kvm nfsd lockd nfs_acl
auth_rpcgss sunrpc exportfs ip6t_LOG ipt_MASQUERADE xt_pkttype xt_TCPMSS
xt_tcpudp ipt_LOG xt_limit snd_pcm_oss snd_mixer_oss snd_seq
snd_seq_device wlan_tkip i915 drm af_packet ip6t_REJECT
nf_conntrack_ipv6 ipt_REJECT xt_physdev xt_state iptable_mangle
iptable_nat nf_nat iptable_filter ip6table_mangle
nf_conntrack_netbios_ns nf_conntrack_ipv4 nf_conntrack ip_tables
ip6table_filter ip6_tables x_tables ipv6 microcode cpufreq_conservative
cpufreq_userspace cpufreq_powersave acpi_cpufreq bridge bnep fuse usbhid
hid ff_memless ohci_hcd loop mt2060 rfcomm l2cap dvb_usb_dib0700
dib7000p dib7000m dvb_usb wlan_scan_sta dvb_core snd_hda_intel
ath_rate_sample rtc_cmos dib3000mc ppdev pcmcia iTCO_wdt firmware_class
rtc_core parport_pc snd_pcm dibx000_common sdhci iTCO_vendor_support
parport i2c_i801 hci_usb rtc_lib dib0070 ohci1394 snd_timer
snd_page_alloc serio_raw mmc_core ieee1394 i2c_core yenta_socket wlan
joydev video snd_hwdep rsrc_nonstatic sg pcmcia_core snd bluetooth
output battery soundcore ac button ath_hal(P) intel_agp sky2
sha256_generic aes_x86_64 aes_generic cbc dm_crypt crypto_blkcipher
ehci_hcd sd_mod uhci_hcd usbcore dm_snapshot dm_mod edd ext3 mbcache jbd
fan ata_piix ahci libata scsi_mod dock thermal processor [last unloaded:
ath_pci]
Pid: 3043, comm: qemu-system-x86 Tainted: P N
2.6.25.18-0.2-default #1
RIP: 0010:[<ffffffff8883fcec>] [<ffffffff8883fcec>]
:kvm:is_largepage_backed+0x2f/0xe7
RSP: 0018:ffff81000599fa08 EFLAGS: 00010287
RAX: ffffc20005261808 RBX: 0000000000000004 RCX: 0000000000000005
RDX: 00000000000f1000 RSI: ffff81001099c188 RDI: ffffc20005261800
RBP: ffff81000599fa28 R08: 0000000000000021 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000004 R12: 00000000000000a4
R13: ffff81003a378740 R14: ffff81003a378740 R15: ffff81003a379cd0
FS: 0000000041afc950(0000) GS:ffff81007f36ee40(0000) knlGS:0000000000000000
CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b
CR2: ffffc20005261808 CR3: 000000003a27b000 CR4: 00000000000026a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process qemu-system-x86 (pid: 3043, threadinfo ffff81000599e000, task
ffff81006adc0380)
Stack: ffff81000599fa38 0000000000000004 00000000000000a4 ffff81003a378740
ffff81000599fb28 ffffffff888413e9 ffff81000599fa68 ffff81000599faf8
000000000002e561 ffff81003a378740 00000000ef76d004 00000000000003bd
Call Trace:
[<ffffffff888413e9>] :kvm:kvm_mmu_pte_write+0x124/0x7c6
[<ffffffff88839e8d>] :kvm:emulator_write_phys+0x37/0x47
[<ffffffff8883d121>] :kvm:emulator_write_emulated_onepage+0x71/0xf9
[<ffffffff8883d20e>] :kvm:emulator_write_emulated+0x65/0x71
[<ffffffff88846695>] :kvm:x86_emulate_insn+0x3d39/0x49ca
[<ffffffff88839d7b>] :kvm:emulate_instruction+0x199/0x267
[<ffffffff88841288>] :kvm:kvm_mmu_page_fault+0x49/0x86
[<ffffffff88867075>] :kvm_intel:handle_exception+0x184/0x2d9
[<ffffffff888673ba>] :kvm_intel:kvm_handle_exit+0x163/0x185
[<ffffffff8883bcfd>] :kvm:kvm_arch_vcpu_ioctl_run+0x600/0x871
[<ffffffff888354b3>] :kvm:kvm_vcpu_ioctl+0xf6/0x485
[<ffffffff802acada>] vfs_ioctl+0x2a/0x78
[<ffffffff802acd6f>] do_vfs_ioctl+0x247/0x261
[<ffffffff802acdde>] sys_ioctl+0x55/0x77
[<ffffffff8020bffa>] system_call_after_swapgs+0x8a/0x8f
[<00007fa121f45b67>]
Code: 41 55 49 89 fd 41 54 49 89 f4 53 48 83 ec 08 48 8b 3f e8 c8 65 ff
ff 48 85 c0 48 89 c6 0f 84 b6 00 00 00 4c 89 e7 e8 05 e0 ff ff <83> 38
00 0f 85 a5 00 00 00 49 8b 7d 00 4c 89 e6 e8 28 62 ff ff
RIP [<ffffffff8883fcec>] :kvm:is_largepage_backed+0x2f/0xe7
RSP <ffff81000599fa08>
CR2: ffffc20005261808
---[ end trace 5b290f44949eab07 ]---
(kernel tained due to madwifi)
qemu was started like this:
qemu-system-x86_64 <some-32-bit-Linux-image> -m 768 -serial stdio \
-net nic,model=virtio -net user
The guest was copying some files via network onto its disk when the oops
happened.
Can anyone make some sense out of it?
Thanks,
Jan - who actually has to reboot now :(
--
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux
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