cvmfs-server always crashes on reboot.

/sbin/shutdown -r now

abrt_version:   2.0.8

cmdline:        ro root=/dev/mapper/VolGroup00-LogVol00 rd_NO_LUKS console=ttyS0,115200 console=tty0 LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 rd_LVM_LV=VolGroup00/LogVol01 rd_LVM_LV=VolGroup00/LogVol00  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM crashkernel=129M@0M

hostname:       lxcvmfs52.cern.ch

kernel:         2.6.32-504.23.4.el6.aufs21.x86_64

last_occurrence: 1435649368

not-reportable: The backtrace does not contain enough meaningful function frames to be reported. It is annoying but it does not necessary signalize a problem with your computer. ABRT will not allow you to create a report in a bug tracking system but you can contact kernel maintainers via e-mail.

time:           Tue 30 Jun 2015 09:20:19 AM CEST

sosreport.tar.xz: Binary file, 1213704 bytes

backtrace:

:WARNING: at arch/x86/kernel/cpu/perf_event_amd.c:701 amd_pmu_init+0x181/0x1f2() (Not tainted)

:Hardware name: OpenStack Nova

:Odd, counter constraints enabled but no core perfctrs detected!

:Modules linked in:

:Pid: 1, comm: swapper Not tainted 2.6.32-504.23.4.el6.aufs21.x86_64 #1

:Call Trace:

:[<ffffffff81074e47>] ? warn_slowpath_common+0x87/0xc0

:[<ffffffff81c35021>] ? init_hw_perf_events+0x0/0x4bb

:[<ffffffff81074f36>] ? warn_slowpath_fmt+0x46/0x50

:[<ffffffff81c3565d>] ? amd_pmu_init+0x181/0x1f2

:[<ffffffff81c35060>] ? init_hw_perf_events+0x3f/0x4bb

:[<ffffffff81c35021>] ? init_hw_perf_events+0x0/0x4bb

:[<ffffffff8100204c>] ? do_one_initcall+0x3c/0x1d0

:[<ffffffff81c2a762>] ? kernel_init+0x119/0x2f7

:[<ffffffff8100969d>] ? __switch_to+0x7d/0x320

:[<ffffffff8100c28a>] ? child_rip+0xa/0x20

:[<ffffffff81c2a649>] ? kernel_init+0x0/0x2f7

:[<ffffffff8100c280>] ? child_rip+0x0/0x20