root@vagrant:# cat dump.log
(00.000038) Probing sock diag modules
(00.000107) Done probing
(00.000113) ========================================
(00.000116) Dumping processes (pid: 25393)
(00.000119) ========================================
(00.000168) Found anon-shmem device at 4
(00.000177) Reset 797's dirty tracking
(00.000236)  ... done
(00.000279) Dirty track supported on kernel
(00.000316) irmap: Searching irmap cache in work dir
(00.000332) No irmap-cache image
(00.000337) irmap: Searching irmap cache in parent
(00.000341) irmap: No irmap cache
(00.000350) cpu: fpu:1 fxsr:1 xsave:1
(00.000431) vdso: Parsing at 7fff46ffe000 7fff47000000
(00.000434) vdso: PT_LOAD p_vaddr: ffffffffff700000
(00.000438) vdso: DT_HASH: 0xffffffffff700120
(00.000441) vdso: DT_STRTAB: 0xffffffffff700268
(00.000443) vdso: DT_SYMTAB: 0xffffffffff700160
(00.000445) vdso: DT_STRSZ: 94
(00.000447) vdso: DT_SYMENT: 24
(00.000449) vdso: nbucket 3 nchain 11 bucket 0x7fff46ffe128 chain 0x7fff46ffe134
(00.000455) vdso: rt [vdso] 7fff46ffe000-7fff47000000 [vvar] ffffffffffffffff-ffffffffffffffff
(00.000515) Writing image inventory (version 1)
(00.000558) Add pid ns 1 pid 797
(00.000567) Add net ns 2 pid 797
(00.000572) Add ipc ns 3 pid 797
(00.000577) Add uts ns 4 pid 797
(00.000584) Add mnt ns 5 pid 797
(00.000589) Add user ns 6 pid 797
(00.000592) cg: Dumping cgroups for 797
(00.000624) cg:  `- New css ID 1
(00.000629) cg:     `- [blkio] -> [/]
(00.000632) cg:     `- [cpu] -> [/]
(00.000634) cg:     `- [cpuacct] -> [/]
(00.000636) cg:     `- [cpuset] -> [/]
(00.000638) cg:     `- [devices] -> [/]
(00.000640) cg:     `- [freezer] -> [/]
(00.000642) cg:     `- [hugetlb] -> [/]
(00.000644) cg:     `- [memory] -> [/]
(00.000646) cg:     `- [name=systemd] -> [/]
(00.000648) cg:     `- [perf_event] -> [/]
(00.000651) cg: Set 1 is criu one
(00.000875) Seized task 25393, state 1
(00.000918) Seized task 25788, state 0
(00.001064) Collected 25788 in 1 state
(00.001070) Seized task 25803, state 0
(00.001220) Collected 25803 in 1 state
(00.001226) Seized task 25904, state 0
(00.001389) 	Seizing 25904's 25910 thread
(00.001592) 	Seizing 25904's 25911 thread
(00.001661) 	Seizing 25904's 25912 thread
(00.001803) Collected 25904 in 1 state
(00.001807) Seized task 25918, state 0
(00.001957) Collected 25918 in 1 state
(00.001964) Seized task 25919, state 0
(00.002127) Collected 25919 in 1 state
(00.002143) Seized task 26873, state 0
(00.002319) Collected 26873 in 1 state
(00.002325) Seized task 26954, state 0
(00.002845) Collected 26954 in 1 state
(00.002852) Seized task 26957, state 0
(00.003361) Collected 26957 in 1 state
(00.003372) Seized task 27303, state 0
(00.003931) Collected 27303 in 1 state
(00.003944) Seized task 768, state 0
(00.004546) Collected 768 in 1 state
(00.004552) Seized task 770, state 0
(00.004710) Collected 770 in 1 state
(00.004716) Seized task 772, state 0
(00.004996) Collected 772 in 1 state
(00.005057) Seized task 782, state 0
(00.005213) Collected 782 in 1 state
(00.005229) Seized task 787, state 0
(00.005357) Collected 787 in 1 state
(00.005395) Collected 25393 in 1 state
(00.005408) Will take pid namespace in the image
(00.005413) Add pid ns 7 pid 25393
(00.005418) Will take net namespace in the image
(00.005420) Add net ns 8 pid 25393
(00.005425) Will take ipc namespace in the image
(00.005428) Add ipc ns 9 pid 25393
(00.005434) Will take uts namespace in the image
(00.005437) Add uts ns 10 pid 25393
(00.005444) Will take mnt namespace in the image
(00.005447) Add mnt ns 11 pid 25393
(00.005881) Lock network
(00.005887) Running network-lock scripts
(00.005908) 	[/usr/share/lxc/lxc-restore-net]
(00.009719) lockinfo: 1:1 1 2745 fc:00:1350488 0 EOF
(00.009739) lockinfo: 2:1 1 2745 fc:00:1350478 0 EOF
(00.009743) lockinfo: 3:1 1 2745 fc:00:1350466 0 EOF
(00.009746) lockinfo: 4:1 1 2745 fc:00:1310802 0 EOF
(00.009749) lockinfo: 5:1 1 2745 fc:00:1310775 0 EOF
(00.009775) lockinfo: 6:2 1 3218 fc:00:1848012 0 EOF
(00.009819) lockinfo: 7:1 1 2745 fc:00:1321882 0 EOF
(00.009827) lockinfo: 8:1 1 2745 fc:00:1316960 0 EOF
(00.009830) lockinfo: 9:1 1 2745 fc:00:1310750 0 EOF
(00.009833) lockinfo: 10:1 1 1325 00:10:11626 0 EOF
(00.009846) lockinfo: 11:2 1 1001 00:10:11038 0 EOF
(00.009849) lockinfo: 12:2 1 26943 00:81:4717812 0 EOF
(00.009852) lockinfo: 13:1 1 2745 fc:00:1350521 0 EOF
(00.009856) lockinfo: 14:1 1 2745 fc:00:1350514 0 EOF
(00.009859) lockinfo: 15:1 1 2745 fc:00:1350498 0 EOF
(00.009862) lockinfo: 16:1 1 2745 fc:00:1350490 0 EOF
(00.009865) lockinfo: 17:1 1 2745 fc:00:1350459 0 EOF
(00.009868) lockinfo: 18:1 1 2745 fc:00:1350452 0 EOF
(00.009871) lockinfo: 19:1 1 2745 fc:00:1350445 0 EOF
(00.009890) lockinfo: 20:1 1 2745 fc:00:1310784 0 EOF
(00.009893) lockinfo: 21:1 1 2745 fc:00:1310769 0 EOF
(00.009916) lockinfo: 22:1 1 2745 fc:00:1310763 0 EOF
(00.009937) lockinfo: 23:2 1 3252 fc:00:1848013 0 EOF
(00.009945) lockinfo: 24:2 1 3175 fc:00:1848014 0 EOF
(00.009978) lockinfo: 25:1 1 2745 fc:00:1322310 0 EOF
(00.009982) lockinfo: 26:1 1 2745 fc:00:1322359 0 EOF
(00.009987) lockinfo: 27:1 1 2745 fc:00:1322338 0 EOF
(00.009992) lockinfo: 28:2 1 785 00:10:9595 0 EOF
(00.010230) 	type ext4 source /dev/mapper/vagrant--vg-root mnt_id 0x9b s_dev 0xfc00000 /var/lib/lxc/u1/rootfs @ ./ flags 0x200000 options errors=remount-ro,data=ordered
(00.010244) 	type tmpfs source none mnt_id 0x168 s_dev 0x7a / @ ./dev flags 0x200000 options size=100k,mode=755
(00.010250) 	type proc source proc mnt_id 0x169 s_dev 0x7c / @ ./proc flags 0x20000e options
(00.010255) 	type proc source proc mnt_id 0x16a s_dev 0x7c /sys/net @ ./proc/sys/net flags 0x20000e options
(00.010262) 	type proc source proc mnt_id 0x16b s_dev 0x7c /sys @ ./proc/sys flags 0x20000f options
(00.010268) 	type proc source proc mnt_id 0x16c s_dev 0x7c /sysrq-trigger @ ./proc/sysrq-trigger flags 0x20000f options
(00.010294) 	type sysfs source sysfs mnt_id 0x16d s_dev 0x7d / @ ./sys flags 0x20000e options
(00.010334) 	type sysfs source sysfs mnt_id 0x16e s_dev 0x7d / @ ./sys flags 0x20000f options
(00.010340) 	type sysfs source sysfs mnt_id 0x16f s_dev 0x7d / @ ./sys/devices/virtual/net flags 0x200000 options
(00.010345) 	type sysfs source sysfs mnt_id 0x170 s_dev 0x7d /devices/virtual/net @ ./sys/devices/virtual/net flags 0x20000e options
(00.010349) 	type fusectl source none mnt_id 0x171 s_dev 0x12 / @ ./sys/fs/fuse/connections flags 0x200000 options
(00.010355) 	type debugfs source none mnt_id 0x172 s_dev 0x6 / @ ./sys/kernel/debug flags 0x200000 options
(00.010436) 	type securityfs source none mnt_id 0x173 s_dev 0xa / @ ./sys/kernel/security flags 0x200000 options
(00.010448) 	type pstore source none mnt_id 0x174 s_dev 0x19 / @ ./sys/fs/pstore flags 0x200000 options
(00.010455) 	type tmpfs source cgroup mnt_id 0x175 s_dev 0x7e / @ ./sys/fs/cgroup flags 0x200000 options size=12k,mode=755
(00.010460) 	type tmpfs source none mnt_id 0x176 s_dev 0x11 /cgmanager @ ./sys/fs/cgroup/cgmanager flags 0x200000 options size=4k,mode=755
(00.010515) 	type fuse.lxcfs source lxcfs mnt_id 0x177 s_dev 0x79 /proc/cpuinfo @ ./proc/cpuinfo flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010527) 	type fuse.lxcfs source lxcfs mnt_id 0x178 s_dev 0x79 /proc/meminfo @ ./proc/meminfo flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010534) 	type fuse.lxcfs source lxcfs mnt_id 0x179 s_dev 0x79 /proc/stat @ ./proc/stat flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010541) 	type fuse.lxcfs source lxcfs mnt_id 0x17a s_dev 0x79 /proc/uptime @ ./proc/uptime flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010546) 	type tmpfs source none mnt_id 0x17b s_dev 0x7f / @ ./sys/fs/cgroup flags 0x200000 options size=4k,mode=755
(00.010575) 	type tmpfs source none mnt_id 0x17c s_dev 0x11 /cgmanager @ ./sys/fs/cgroup/cgmanager flags 0x200000 options size=4k,mode=755
(00.010611) 	type fuse.lxcfs source lxcfs mnt_id 0x17d s_dev 0x79 /cgroup/blkio @ ./sys/fs/cgroup/blkio flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010631) 	type fuse.lxcfs source lxcfs mnt_id 0x17e s_dev 0x79 /cgroup/cpu @ ./sys/fs/cgroup/cpu flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010636) 	type fuse.lxcfs source lxcfs mnt_id 0x17f s_dev 0x79 /cgroup/cpuacct @ ./sys/fs/cgroup/cpuacct flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010701) 	type fuse.lxcfs source lxcfs mnt_id 0x180 s_dev 0x79 /cgroup/cpuset @ ./sys/fs/cgroup/cpuset flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010708) 	type fuse.lxcfs source lxcfs mnt_id 0x181 s_dev 0x79 /cgroup/devices @ ./sys/fs/cgroup/devices flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010714) 	type fuse.lxcfs source lxcfs mnt_id 0x182 s_dev 0x79 /cgroup/freezer @ ./sys/fs/cgroup/freezer flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010720) 	type fuse.lxcfs source lxcfs mnt_id 0x183 s_dev 0x79 /cgroup/hugetlb @ ./sys/fs/cgroup/hugetlb flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010727) 	type fuse.lxcfs source lxcfs mnt_id 0x184 s_dev 0x79 /cgroup/memory @ ./sys/fs/cgroup/memory flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010802) 	type fuse.lxcfs source lxcfs mnt_id 0x185 s_dev 0x79 /cgroup/name=systemd @ ./sys/fs/cgroup/systemd flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010811) 	type fuse.lxcfs source lxcfs mnt_id 0x186 s_dev 0x79 /cgroup/perf_event @ ./sys/fs/cgroup/perf_event flags 0x200006 options user_id=0,group_id=0,allow_other
(00.010816) 	type devpts source devpts mnt_id 0x9d s_dev 0x80 / @ ./dev/pts flags 0x200000 options gid=5,mode=620,ptmxmode=666
(00.011127) 	type tmpfs source none mnt_id 0x9e s_dev 0x81 / @ ./run flags 0x20000a options size=256260k,mode=755
(00.011187) 	type tmpfs source none mnt_id 0x9f s_dev 0x82 / @ ./run/lock flags 0x20000e options size=5120k
(00.011200) 	type tmpfs source none mnt_id 0xa0 s_dev 0x83 / @ ./run/shm flags 0x200006 options
(00.011208) 	type tmpfs source none mnt_id 0xa1 s_dev 0x84 / @ ./run/user flags 0x20000e options size=102400k,mode=755
(00.011232) Building mountpoints tree
(00.011239) 	Building plain mount tree
(00.011240) 		Working on 161->158
(00.011242) 		Working on 160->158
(00.011244) 		Working on 159->158
(00.011246) 		Working on 158->155
(00.011249) 		Working on 157->360
(00.011251) 		Working on 390->379
(00.011254) 		Working on 389->379
(00.011256) 		Working on 388->379
(00.011259) 		Working on 387->379
(00.011262) 		Working on 386->379
(00.011265) 		Working on 385->379
(00.011267) 		Working on 384->379
(00.011270) 		Working on 383->379
(00.011273) 		Working on 382->379
(00.011276) 		Working on 381->379
(00.011279) 		Working on 380->379
(00.011282) 		Working on 379->373
(00.011287) 		Working on 378->361
(00.011290) 		Working on 377->361
(00.011293) 		Working on 376->361
(00.011296) 		Working on 375->361
(00.011299) 		Working on 374->373
(00.011302) 		Working on 373->366
(00.011305) 		Working on 372->366
(00.011308) 		Working on 371->366
(00.011313) 		Working on 370->366
(00.011315) 		Working on 369->366
(00.011317) 		Working on 368->367
(00.011320) 		Working on 367->366
(00.011323) 		Working on 366->365
(00.011325) 		Working on 365->155
(00.011328) 		Working on 364->361
(00.011331) 		Working on 363->361
(00.011334) 		Working on 362->363
(00.011337) 		Working on 361->155
(00.011340) 		Working on 360->155
(00.011343) 		Working on 155->156
(00.011351) 	Resorting siblings on 155
(00.011355) 	Resorting siblings on 158
(00.011358) 	Resorting siblings on 161
(00.011361) 	Resorting siblings on 160
(00.011364) 	Resorting siblings on 159
(00.011367) 	Resorting siblings on 365
(00.011369) 	Resorting siblings on 366
(00.011372) 	Resorting siblings on 373
(00.011375) 	Resorting siblings on 379
(00.011378) 	Resorting siblings on 390
(00.011381) 	Resorting siblings on 389
(00.011385) 	Resorting siblings on 388
(00.011389) 	Resorting siblings on 387
(00.011391) 	Resorting siblings on 386
(00.011393) 	Resorting siblings on 385
(00.011394) 	Resorting siblings on 384
(00.011396) 	Resorting siblings on 383
(00.011399) 	Resorting siblings on 382
(00.011402) 	Resorting siblings on 381
(00.011404) 	Resorting siblings on 380
(00.011407) 	Resorting siblings on 374
(00.011410) 	Resorting siblings on 372
(00.011413) 	Resorting siblings on 371
(00.011416) 	Resorting siblings on 370
(00.011424) 	Resorting siblings on 369
(00.011430) 	Resorting siblings on 367
(00.011434) 	Resorting siblings on 368
(00.011436) 	Resorting siblings on 361
(00.011438) 	Resorting siblings on 378
(00.011440) 	Resorting siblings on 377
(00.011443) 	Resorting siblings on 376
(00.011446) 	Resorting siblings on 375
(00.011448) 	Resorting siblings on 364
(00.011451) 	Resorting siblings on 363
(00.011454) 	Resorting siblings on 362
(00.011457) 	Resorting siblings on 360
(00.011460) 	Resorting siblings on 157
(00.011462) Done:
(00.011465) [./](155->156)
(00.011468)  [./run](158->155)
(00.011471)   [./run/user](161->158)
(00.011477)   <--
(00.011479)   [./run/lock](159->158)
(00.011481)   <--
(00.011483)   [./run/shm](160->158)
(00.011486)   <--
(00.011489)  <--
(00.011491)  [./dev](360->155)
(00.011494)   [./dev/pts](157->360)
(00.011497)   <--
(00.011500)  <--
(00.011503)  [./proc](361->155)
(00.011508)   [./proc/uptime](378->361)
(00.011511)   <--
(00.011514)   [./proc/sys](363->361)
(00.011517)    [./proc/sys/net](362->363)
(00.011522)    <--
(00.011525)   <--
(00.011528)   [./proc/sysrq-trigger](364->361)
(00.011531)   <--
(00.011534)   [./proc/cpuinfo](375->361)
(00.011537)   <--
(00.011540)   [./proc/meminfo](376->361)
(00.011543)   <--
(00.011547)   [./proc/stat](377->361)
(00.011551)   <--
(00.011553)  <--
(00.011554)  [./sys](365->155)
(00.011556)   [./sys](366->365)
(00.011558)    [./sys/fs/cgroup](373->366)
(00.011560)     [./sys/fs/cgroup](379->373)
(00.011562)      [./sys/fs/cgroup/perf_event](390->379)
(00.011564)      <--
(00.011566)      [./sys/fs/cgroup/cgmanager](380->379)
(00.011568)      <--
(00.011571)      [./sys/fs/cgroup/blkio](381->379)
(00.011573)      <--
(00.011576)      [./sys/fs/cgroup/cpu](382->379)
(00.011579)      <--
(00.011582)      [./sys/fs/cgroup/cpuacct](383->379)
(00.011585)      <--
(00.011588)      [./sys/fs/cgroup/cpuset](384->379)
(00.011591)      <--
(00.011593)      [./sys/fs/cgroup/devices](385->379)
(00.011597)      <--
(00.011599)      [./sys/fs/cgroup/freezer](386->379)
(00.011602)      <--
(00.011607)      [./sys/fs/cgroup/hugetlb](387->379)
(00.011610)      <--
(00.011613)      [./sys/fs/cgroup/memory](388->379)
(00.011616)      <--
(00.011619)      [./sys/fs/cgroup/systemd](389->379)
(00.011621)      <--
(00.011624)     <--
(00.011627)     [./sys/fs/cgroup/cgmanager](374->373)
(00.011632)     <--
(00.011635)    <--
(00.011637)    [./sys/devices/virtual/net](367->366)
(00.011639)     [./sys/devices/virtual/net](368->367)
(00.011642)     <--
(00.011644)    <--
(00.011646)    [./sys/fs/fuse/connections](369->366)
(00.011648)    <--
(00.011649)    [./sys/kernel/debug](370->366)
(00.011651)    <--
(00.011653)    [./sys/kernel/security](371->366)
(00.011655)    <--
(00.011657)    [./sys/fs/pstore](372->366)
(00.011659)    <--
(00.011661)   <--
(00.011663)  <--
(00.011666) <--
(00.011676) Error (mount.c:624): 390:./sys/fs/cgroup/perf_event doesn't have a proper root mount
(00.011683) Unlock network
(00.011690) Running network-unlock scripts
(00.011701) 	[/usr/share/lxc/lxc-restore-net]
(00.017623) Unfreezing tasks into 1
(00.017640) 	Unseizing 25393 into 1
(00.017688) 	Unseizing 25788 into 1
(00.017713) 	Unseizing 25803 into 1
(00.017722) 	Unseizing 25904 into 1
(00.017738) 	Unseizing 25918 into 1
(00.017744) 	Unseizing 25919 into 1
(00.017750) 	Unseizing 26873 into 1
(00.017770) 	Unseizing 26954 into 1
(00.017785) 	Unseizing 26957 into 1
(00.017791) 	Unseizing 27303 into 1
(00.017797) 	Unseizing 768 into 1
(00.017803) 	Unseizing 770 into 1
(00.017815) 	Unseizing 772 into 1
(00.017822) 	Unseizing 782 into 1
(00.017838) 	Unseizing 787 into 1
(00.017912) Error (cr-dump.c:1979): Dumping FAILED.