PVE is not working correctly

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Hello.

There is a server:

CPU: 2x Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz
RAM: 32Gb (DDR3 1066 MHz)
HDD: 2x500 Gb SATA (LSI RAID)

Install it PVE 2.3.

# pveversion -v
pve-manager: 2.3-13 (pve-manager/2.3/7946f1f1)
running kernel: 2.6.32-19-pve
proxmox-ve-2.6.32: 2.3-96
pve-kernel-2.6.32-16-pve: 2.6.32-82
pve-kernel-2.6.32-19-pve: 2.6.32-96
lvm2: 2.02.95-1pve2
clvm: 2.02.95-1pve2
corosync-pve: 1.4.4-4
openais-pve: 1.1.4-2
libqb: 0.10.1-2
redhat-cluster-pve: 3.1.93-2
resource-agents-pve: 3.9.2-3
fence-agents-pve: 3.1.9-1
pve-cluster: 1.0-36
qemu-server: 2.3-20
pve-firmware: 1.0-21
libpve-common-perl: 1.0-49
libpve-access-control: 1.0-26
libpve-storage-perl: 2.3-7
vncterm: 1.0-4
vzctl: 4.0-1pve2
vzprocps: 2.0.11-2
vzquota: 3.1-1
pve-qemu-kvm: 1.4-10
ksm-control-daemon: 1.1-1

Immediately after the installation starts to grow LA, although there is no VDS:

root@node0:~# w
 07:20:33 up 7 min,  2 users,  load average: 2.10, 1.51, 0.71
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/0    router.miralab.r 07:13    0.00s 37315days  0.00s w
root     pts/2    router.miralab.r 07:15   43.00s 3960days 3960days -bash
root@node0:~# vzlist -a
Container(s) not found
root@node0:~# qm list
root@node0:~#

It should soszdat 1 KVM VDS, not even including its growth begins LA.

root@node0:~# w
 07:25:43 up 12 min,  2 users,  load average: 3.15, 2.42, 1.31
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT

If you run the VDS load immediately rises to 30-40, and after a while the server stops responding.

In dmesg there is such a:

root@node0:~# dmesg
INFO: task kvm:3835 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kvm           D ffff88087a0882c0     0  3835      1    0 0x00000000
 ffff88087cf8fbc8 0000000000000086 0000000000000000 ffffffff8100984c
 ffff8800397de9c0 ffff88087cf8ffd8 ffff88047dcea410 ffff8800397dc540
 0000000000000000 000000010003edc5 ffff88087a088888 000000000001e9c0
Call Trace:
 [<ffffffff8100984c>] ? __switch_to+0x1ac/0x320
 [<ffffffff8151f185>] schedule_timeout+0x215/0x2e0
 [<ffffffff8151ed84>] wait_for_completion+0xe4/0x120
 [<ffffffff8105a520>] ? default_wake_function+0x0/0x20
 [<ffffffff81065861>] synchronize_sched_expedited+0x1c1/0x280
 [<ffffffff8109cf23>] __synchronize_srcu+0x53/0xf0
 [<ffffffff810656a0>] ? synchronize_sched_expedited+0x0/0x280
 [<ffffffff8109cfd5>] synchronize_srcu_expedited+0x15/0x20
 [<ffffffffa027ad3e>] kvm_io_bus_register_dev+0xae/0xc0 [kvm]
 [<ffffffffa027f77b>] kvm_coalesced_mmio_init+0x7b/0xc0 [kvm]
 [<ffffffffa027c624>] kvm_dev_ioctl+0x474/0x4b0 [kvm]
 [<ffffffff811ac682>] vfs_ioctl+0x22/0xa0
 [<ffffffff811ac82a>] do_vfs_ioctl+0x8a/0x590
 [<ffffffff811acd7f>] sys_ioctl+0x4f/0x80
 [<ffffffff8100b102>] system_call_fastpath+0x16/0x1b
root@node0:~#

I thought that the problem with the memory, but the server has 100 + hours of testing memtest (screenshot added) and found no problems with memory.

The same behavior is observed on the server and on Debian 7 + PVE 3.0.

Please tell me, what could be wrong?

Thanks.