Problems with kvm virtualization on Intel CPU with CentOS
Ohad Levy
ohadlevy at gmail.com
Tue Oct 20 17:32:13 IST 2009
Hi,
I think that you need update 4 for proper KVM support.
Libvirt works with qemu and kvm by design.
Cheers,
Ohad
On 10/20/09, Ehud Karni <ehud at unix.mvs.co.il> wrote:
> Hello all,
>
> I've been using virtualization with Xen for quite a while.
> 2 weeks ago I decided give `kvm' a try, but yesterday I went back to
> Xen, after kvm caused panic and misbehaved.
>
> The CPU is Intel Xeon E5335 @ 2.00GHz 4 cores.
> The OS is CentOS 5.3/4 2.6.18-164.el5 (for kvm use),
> 2.6.18-164.el5xen (for xen use).
>
> The problems with the kvm started when I tried to install the guest.
> The guest panicked immediately after I pressed enter on the 1st screen.
> I overcome this problem by adding the `nmi_watchdog=0' kernel parameter
> when doing the guest installation.
>
> But than I had 3 problems on the host: It lost its network or part of
> it (e.g. NFS mount) occasionally, sometimes it rebooted itself and
> sometimes it panicked. It also filled the log with BUG alerts (example
> is bellow).
>
> So I added the `nmi_watchdog=0' kernel parameter to the host too.
> It made thing better (no reboot or panic) but it still lost the network,
> and the log filled with the same BUG reports.
>
> I changed to the Xen kernel (dropping the nmi_watchdog=0), things
> quited down and there are no errors.
>
> BTW, I found that I can still run the guests with `qemu-kvm' (not the
> qemu-dm that come with Xen) and control them with virt-manager through
> the qemu connection (qemu:///system) even though the kvm and kvm-intel
> modules are not loaded.
>
> Ehud.
>
>
> The BUG allert in the system log:
>
> Oct 10 10:00:11 cvhlnx kernel: BUG: soft lockup - CPU#1 stuck for 10s!
> [qemu-kvm:12659]
> Oct 10 10:00:11 cvhlnx kernel: CPU 1:
> Oct 10 10:00:11 cvhlnx kernel: Modules linked in: loop tun ipt_MASQUERADE
> iptable_nat ip_nat xt_state ip_conntrack nfnetlink ipt_REJECT xt_tcpudp
> iptable_filter ip_tables x_tables nfsd exportfs auth_rpcgss nfs fscache
> nfs_acl lockd sunrpc bridge iscsi_tcp libiscsi_tcp ib_iser libiscsi2
> scsi_transport_iscsi2 scsi_transport_iscsi ib_srp ib_sdp ib_ipoib
> ipoib_helper ipv6 xfrm_nalgo crypto_api rdma_ucm ib_ucm ib_uverbs ib_umad
> rdma_cm ib_cm iw_cm ib_addr ib_sa ib_mad ib_core ext4 jbd2 crc16 dm_mirror
> dm_multipath scsi_dh video hwmon backlight sbs i2c_ec button battery
> asus_acpi acpi_memhotplug ac lp kvm_intel(U) kvm(U) i2c_i801 i2c_core
> parport_pc ide_cd tg3 sg pcspkr cdrom parport i5000_edac edac_mc serio_raw
> dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache usb_storage
> ata_piix libata shpchp aacraid sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd
> ehci_hcd
> Oct 10 10:00:11 cvhlnx kernel: Pid: 12659, comm: qemu-kvm Tainted: G
> 2.6.18-164.el5 #1
> Oct 10 10:00:11 cvhlnx kernel: RIP: 0010:[<ffffffff8827f613>]
> [<ffffffff8827f613>] :kvm:kvm_flush_remote_tlbs+0xfb/0x109
> Oct 10 10:00:11 cvhlnx kernel: RSP: 0018:ffff81014f567878 EFLAGS: 00000297
> Oct 10 10:00:11 cvhlnx kernel: RAX: 0000000000000000 RBX: ffff81014f5678a8
> RCX: 0000000000000000
> Oct 10 10:00:11 cvhlnx kernel: RDX: 000000000003e0a3 RSI: 00000000000000ff
> RDI: 00000000000000c0
> Oct 10 10:00:11 cvhlnx kernel: RBP: ffffffff8827e000 R08: 0000000000000004
> R09: 000000000000003c
> Oct 10 10:00:11 cvhlnx kernel: R10: ffff81014f567888 R11: ffffffff8828fba0
> R12: 0000000000000000
> Oct 10 10:00:11 cvhlnx kernel: R13: 0000000000000000 R14: 0000000000000000
> R15: 000000000000000d
> Oct 10 10:00:11 cvhlnx kernel: FS: 0000000042577940(0000)
> GS:ffff810107f107c0(0000) knlGS:00000000f7fc46c0
> Oct 10 10:00:11 cvhlnx kernel: CS: 0010 DS: 002b ES: 002b CR0:
> 000000008005003b
> Oct 10 10:00:11 cvhlnx kernel: CR2: 00000000080dd1a0 CR3: 00000001332da000
> CR4: 00000000000026e0
> Oct 10 10:00:11 cvhlnx kernel:
> Oct 10 10:00:11 cvhlnx kernel: Call Trace:
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8827f602>]
> :kvm:kvm_flush_remote_tlbs+0xea/0x109
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff882833d0>]
> :kvm:kvm_mmu_pte_write+0x1b0/0x295
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff88280f9e>]
> :kvm:emulator_write_emulated_onepage+0xd4/0x171
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8828740f>]
> :kvm:x86_emulate_memop+0x2bd1/0x3e6a
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff88284402>]
> :kvm:paging64_page_fault+0x102/0x260
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff800114ee>] do_wp_page+0x821/0x918
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8829a3be>]
> :kvm_intel:vmcs_readl+0x17/0x1c
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8828002f>]
> :kvm:emulate_instruction+0xf6/0x286
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8829bd6f>]
> :kvm_intel:handle_exception+0x138/0x21b
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8829cba3>]
> :kvm_intel:vmx_vcpu_run+0x694/0x775
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff88288d1a>]
> :kvm:preempt_notifier_register+0x53/0x79
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff88280384>]
> :kvm:kvm_vcpu_ioctl+0x1c5/0xd0b
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8008a29b>]
> __wake_up_common+0x3e/0x68
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8002e2f2>] __wake_up+0x38/0x4f
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8005121d>] wake_futex+0x45/0x4f
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff800a1f9d>] futex_wake+0x91/0xc7
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8003e2b0>] do_futex+0x282/0xc3f
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff80008d84>]
> __handle_mm_fault+0x5f2/0xf99
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8014d83d>] __next_cpu+0x19/0x28
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff80097baf>]
> __dequeue_signal+0x12d/0x193
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8008be71>]
> default_wake_function+0x0/0xe
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff80097667>]
> recalc_sigpending+0xe/0x25
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff800420a5>] do_ioctl+0x21/0x6b
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff800302ce>] vfs_ioctl+0x457/0x4b9
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff800a2d1a>] sys_futex+0x10d/0x12d
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8004c766>] sys_ioctl+0x59/0x78
> Oct 10 10:00:11 cvhlnx kernel: [<ffffffff8005d116>] system_call+0x7e/0x83
> Oct 10 10:00:11 cvhlnx kernel:
>
>
> --
> Ehud Karni Tel: +972-3-7966-561 /"\
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