On 11/27/2009 01:17 PM, Elmar Haneke wrote:
My Linux box running several KVM/QEmu-proceses did stop work (until reset). In kern.log I found this message: ------------[ cut here ]------------ Nov 27 11:16:57 winserver kernel: [15721.577859] kernel BUG at /home/blank/debian/kernel/release/linux-2.6/linux-2.6-2.6.31/debian/build/source_amd64_none/arch/x86/kvm/mmu.c:582! Nov 27 11:16:57 winserver kernel: [15721.577872] invalid opcode: 0000 [#1] SMP Nov 27 11:16:57 winserver kernel: [15721.577881] last sysfs file: /sys/devices/pci0000:00/0000:00:14.4/0000:02:0f.0/net/eth0/brport/hold_timer Nov 27 11:16:57 winserver kernel: [15721.577892] CPU 0 Nov 27 11:16:57 winserver kernel: [15721.577898] Modules linked in: tcp_diag inet_diag tun ipt_REDIRECT xt_tcpudp iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables kvm_amd kvm nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss sunrpc bridge stp loop snd_hda_codec_atihdmi serio_raw evdev snd_pcsp snd_hda_codec_realtek snd_hda_intel snd_hda_codec amd64_edac_mod k8temp edac_core snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc button i2c_piix4 i2c_core processor shpchp pci_hotplug ext3 jbd mbcache sd_mod crc_t10dif ata_generic ide_pci_generic floppy r8169 mii ahci atiixp ehci_hcd ide_core libata ohci_hcd scsi_mod thermal fan thermal_sys [last unloaded: scsi_wait_scan] Nov 27 11:16:57 winserver kernel: [15721.578027] Pid: 3255, comm: qemu-system-x86 Not tainted 2.6.31-1-amd64 #1 GA-MA69GM-S2H Nov 27 11:16:57 winserver kernel: [15721.578038] RIP: 0010:[<ffffffffa038a046>] [<ffffffffa038a046>] rmap_remove+0xd9/0x1de [kvm]
This (or rather a related) BUG() in rmap_remove() was linked in the past to hardware problems. Can you run memtest on your host?
I'll add some diagnostics so we get more information the next time this happens.
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