[CRIU] Using CRIU for "Seamless Kernel Update"
Rajat Jain
rajatja at google.com
Fri Jun 25 01:44:21 MSK 2021
Hello,
I came across the CRIU's seamless kernel update usecase
(https://criu.org/Seamless_kernel_upgrade)
and would like to use the tool for the same use case. My questions:
1) Has any one actually tried that use case successfully? Are there
any notes to share from that experiment? Any links where this was
successfully tried?
2) As I begun experimenting with it, I came across more resources that
suggest it might be quite impractical to try and checkpoint *all* the
processes of a production system (which may have complex processes):
https://www.criu.org/What_cannot_be_checkpointed
https://blog.linuxplumbersconf.org/2016/ocw/proposals/4017.html
So again, how many of these restrictions still hold true, and any
thoughts on whether the user case is really feasible with the current
state of affairs?
3) If my system consists of multiple processes that talk to, and
depend on each other, what is the suggested approach to determine the
order in which the processes must be checkpointed? I initially thought
of checkpointing the init process (pipd=1) but doesn't quite work
since criu process is a dependent.
4) I'm able to checkpoint and restore simple processes I wrote myself,
to play with CRIU. Although if I arbitrarily chose a real life complex
process in my chromebook (the Chrome browser) that opens a lot of FDs
and network sockets and forks multiple child processes, and talks to
multiple daemons in the system, I fail to checkpoint it. After
stepping through some other problems, my current problem is that criu
dump fails with this error. Any hints on what went wrong or how I can
work around it shall be greatly appreciated,
Thanks,
Rajat
(00.000001) Version: 3.15 (gitid 0)
(00.000010) Running on localhost Linux 5.10.45 #4 SMP PREEMPT Thu Jun
24 13:49:55 PDT 2021 x86_64
(00.000016) Loaded kdat cache from /run/criu.kdat
(00.000017) ========================================
(00.000018) Dumping processes (pid: 1904)
(00.000018) ========================================
(00.000020) rlimit: RLIMIT_NOFILE unlimited for self
(00.000021) Running pre-dump scripts
(00.000030) irmap: Searching irmap cache in work dir
(00.000032) No irmap-cache image
(00.000033) irmap: Searching irmap cache in parent
(00.000034) irmap: No irmap cache
(00.000041) cpu: x86_family 6 x86_vendor_id GenuineIntel x86_model_id
11th Gen Intel(R) Core(TM) i5-1145G7 @ 2.60GHz
(00.000043) cpu: fpu: xfeatures_mask 0x2e5 xsave_size 2696
xsave_size_max 2696 xsaves_size 2440
(00.000045) cpu: fpu: x87 floating point registers xstate_offsets
0 / 0 xstate_sizes 160 / 160
(00.000046) cpu: fpu: AVX registers xstate_offsets
576 / 576 xstate_sizes 256 / 256
(00.000047) cpu: fpu: AVX-512 opmask xstate_offsets
1088 / 832 xstate_sizes 64 / 64
(00.000048) cpu: fpu: AVX-512 Hi256 xstate_offsets
1152 / 896 xstate_sizes 512 / 512
(00.000049) cpu: fpu: AVX-512 ZMM_Hi256 xstate_offsets
1664 / 1408 xstate_sizes 1024 / 1024
(00.000050) cpu: fpu: Protection Keys User registers xstate_offsets
2688 / 2432 xstate_sizes 8 / 8
(00.000051) cpu: fpu:1 fxsr:1 xsave:1 xsaveopt:1 xsavec:1 xgetbv1:1 xsaves:1
(00.000089) cg-prop: Parsing controller "cpu"
(00.000090) cg-prop: Strategy "replace"
(00.000091) cg-prop: Property "cpu.shares"
(00.000092) cg-prop: Property "cpu.cfs_period_us"
(00.000092) cg-prop: Property "cpu.cfs_quota_us"
(00.000093) cg-prop: Property "cpu.rt_period_us"
(00.000093) cg-prop: Property "cpu.rt_runtime_us"
(00.000094) cg-prop: Parsing controller "memory"
(00.000094) cg-prop: Strategy "replace"
(00.000094) cg-prop: Property "memory.limit_in_bytes"
(00.000095) cg-prop: Property "memory.memsw.limit_in_bytes"
(00.000095) cg-prop: Property "memory.swappiness"
(00.000096) cg-prop: Property "memory.soft_limit_in_bytes"
(00.000096) cg-prop: Property "memory.move_charge_at_immigrate"
(00.000097) cg-prop: Property "memory.oom_control"
(00.000097) cg-prop: Property "memory.use_hierarchy"
(00.000098) cg-prop: Property "memory.kmem.limit_in_bytes"
(00.000098) cg-prop: Property "memory.kmem.tcp.limit_in_bytes"
(00.000098) cg-prop: Parsing controller "cpuset"
(00.000099) cg-prop: Strategy "replace"
(00.000099) cg-prop: Property "cpuset.cpus"
(00.000100) cg-prop: Property "cpuset.mems"
(00.000100) cg-prop: Property "cpuset.memory_migrate"
(00.000101) cg-prop: Property "cpuset.cpu_exclusive"
(00.000101) cg-prop: Property "cpuset.mem_exclusive"
(00.000102) cg-prop: Property "cpuset.mem_hardwall"
(00.000102) cg-prop: Property "cpuset.memory_spread_page"
(00.000103) cg-prop: Property "cpuset.memory_spread_slab"
(00.000103) cg-prop: Property "cpuset.sched_load_balance"
(00.000103) cg-prop: Property "cpuset.sched_relax_domain_level"
(00.000104) cg-prop: Parsing controller "blkio"
(00.000104) cg-prop: Strategy "replace"
(00.000105) cg-prop: Property "blkio.weight"
(00.000105) cg-prop: Parsing controller "freezer"
(00.000106) cg-prop: Strategy "replace"
(00.000106) cg-prop: Parsing controller "perf_event"
(00.000107) cg-prop: Strategy "replace"
(00.000107) cg-prop: Parsing controller "net_cls"
(00.000108) cg-prop: Strategy "replace"
(00.000108) cg-prop: Property "net_cls.classid"
(00.000109) cg-prop: Parsing controller "net_prio"
(00.000111) cg-prop: Strategy "replace"
(00.000111) cg-prop: Property "net_prio.ifpriomap"
(00.000111) cg-prop: Parsing controller "pids"
(00.000112) cg-prop: Strategy "replace"
(00.000112) cg-prop: Property "pids.max"
(00.000113) cg-prop: Parsing controller "devices"
(00.000113) cg-prop: Strategy "replace"
(00.000114) cg-prop: Property "devices.list"
(00.000130) Preparing image inventory (version 1)
(00.000140) Add pid ns 1 pid 8996
(00.000147) Add net ns 2 pid 8996
(00.000151) Add ipc ns 3 pid 8996
(00.000154) Add uts ns 4 pid 8996
(00.000159) Add time ns 5 pid 8996
(00.000165) Add mnt ns 6 pid 8996
(00.000170) Add user ns 7 pid 8996
(00.000173) Add cgroup ns 8 pid 8996
(00.000175) cg: Dumping cgroups for 8996
(00.000182) cg: `- New css ID 1
(00.000185) cg: `- [cpu] -> [/] [0]
(00.000186) cg: `- [cpuacct] -> [/] [0]
(00.000188) cg: `- [cpuset] -> [/] [0]
(00.000188) cg: `- [devices] -> [/] [0]
(00.000189) cg: `- [freezer] -> [/] [0]
(00.000189) cg: `- [memory] -> [/] [0]
(00.000190) cg: `- [net_cls] -> [/] [0]
(00.000190) cg: Set 1 is criu one
(00.000195) Detected cgroup V1 freezer
(00.000259) Seized task 1904, state 1
(00.000261) seccomp: Collected tid_real 1904 mode 0
(00.000270) Collected (4 attempts, 0 in_progress)
(00.000281) Seized task 1928, state 0
(00.000309) seccomp: Collected tid_real 1928 mode 0
(00.000331) Seizing 1928's 1934 thread
(00.000361) seccomp: Collected tid_real 1934 mode 0
(00.000363) Seizing 1928's 1944 thread
(00.000384) seccomp: Collected tid_real 1944 mode 0
(00.000385) Seizing 1928's 1945 thread
(00.000420) seccomp: Collected tid_real 1945 mode 0
(00.000422) Seizing 1928's 1946 thread
(00.000449) seccomp: Collected tid_real 1946 mode 0
(00.000450) Seizing 1928's 1947 thread
(00.000476) seccomp: Collected tid_real 1947 mode 0
(00.000477) Seizing 1928's 1948 thread
(00.000501) seccomp: Collected tid_real 1948 mode 0
(00.000503) Seizing 1928's 1953 thread
(00.000521) seccomp: Collected tid_real 1953 mode 0
(00.000523) Seizing 1928's 1954 thread
(00.000543) seccomp: Collected tid_real 1954 mode 0
(00.000544) Seizing 1928's 1955 thread
(00.000562) seccomp: Collected tid_real 1955 mode 0
(00.000563) Seizing 1928's 1956 thread
(00.000580) seccomp: Collected tid_real 1956 mode 0
(00.000581) Seizing 1928's 1959 thread
(00.000607) seccomp: Collected tid_real 1959 mode 0
(00.000608) Seizing 1928's 1960 thread
(00.000625) seccomp: Collected tid_real 1960 mode 0
(00.000627) Seizing 1928's 1961 thread
(00.000652) seccomp: Collected tid_real 1961 mode 0
(00.000654) Seizing 1928's 1962 thread
(00.000679) seccomp: Collected tid_real 1962 mode 0
(00.000681) Seizing 1928's 1963 thread
(00.000704) seccomp: Collected tid_real 1963 mode 0
(00.000706) Seizing 1928's 1964 thread
(00.000730) seccomp: Collected tid_real 1964 mode 0
(00.000732) Seizing 1928's 1965 thread
(00.000752) seccomp: Collected tid_real 1965 mode 0
(00.000753) Seizing 1928's 1966 thread
(00.000776) seccomp: Collected tid_real 1966 mode 0
(00.000778) Seizing 1928's 1977 thread
(00.000804) seccomp: Collected tid_real 1977 mode 0
(00.000806) Seizing 1928's 1986 thread
(00.000824) seccomp: Collected tid_real 1986 mode 0
(00.000826) Seizing 1928's 1995 thread
(00.000843) seccomp: Collected tid_real 1995 mode 0
(00.000845) Seizing 1928's 2244 thread
(00.000862) seccomp: Collected tid_real 2244 mode 0
(00.000863) Seizing 1928's 3621 thread
(00.000879) seccomp: Collected tid_real 3621 mode 0
(00.000880) Seizing 1928's 5055 thread
(00.000899) seccomp: Collected tid_real 5055 mode 0
(00.000910) Collected (3 attempts, 0 in_progress)
(00.000970) Seized task 1936, state 0
(00.000993) seccomp: Collected tid_real 1936 mode 0
(00.000998) Collected (4 attempts, 0 in_progress)
(00.001004) Seized task 1967, state 0
(00.001026) seccomp: Collected tid_real 1967 mode 0x2
(00.001057) Seizing 1967's 1975 thread
(00.001076) seccomp: Collected tid_real 1975 mode 0x2
(00.001077) Seizing 1967's 1976 thread
(00.001094) seccomp: Collected tid_real 1976 mode 0x2
(00.001095) Seizing 1967's 1978 thread
(00.001121) seccomp: Collected tid_real 1978 mode 0x2
(00.001123) Seizing 1967's 1979 thread
(00.001147) seccomp: Collected tid_real 1979 mode 0x2
(00.001149) Seizing 1967's 1980 thread
(00.001174) seccomp: Collected tid_real 1980 mode 0x2
(00.001175) Seizing 1967's 1983 thread
(00.001199) seccomp: Collected tid_real 1983 mode 0x2
(00.001201) Seizing 1967's 1985 thread
(00.001224) seccomp: Collected tid_real 1985 mode 0x2
(00.001226) Seizing 1967's 2056 thread
(00.001252) seccomp: Collected tid_real 2056 mode 0x2
(00.001254) Seizing 1967's 2057 thread
(00.001273) seccomp: Collected tid_real 2057 mode 0x2
(00.001275) Seizing 1967's 2069 thread
(00.001298) seccomp: Collected tid_real 2069 mode 0x2
(00.001299) Seizing 1967's 2070 thread
(00.001320) seccomp: Collected tid_real 2070 mode 0x2
(00.001322) Seizing 1967's 2767 thread
(00.001342) seccomp: Collected tid_real 2767 mode 0x2
(00.001344) Seizing 1967's 3451 thread
(00.001367) seccomp: Collected tid_real 3451 mode 0x2
(00.001369) Seizing 1967's 3460 thread
(00.001391) seccomp: Collected tid_real 3460 mode 0x2
(00.001393) Seizing 1967's 3461 thread
(00.001413) seccomp: Collected tid_real 3461 mode 0x2
(00.001415) Seizing 1967's 3483 thread
(00.001438) seccomp: Collected tid_real 3483 mode 0x2
(00.001439) Seizing 1967's 3484 thread
(00.001461) seccomp: Collected tid_real 3484 mode 0x2
(00.001463) Seizing 1967's 3485 thread
(00.001488) seccomp: Collected tid_real 3485 mode 0x2
(00.001490) Seizing 1967's 3486 thread
(00.001514) seccomp: Collected tid_real 3486 mode 0x2
(00.001516) Seizing 1967's 3487 thread
(00.001539) seccomp: Collected tid_real 3487 mode 0x2
(00.001541) Seizing 1967's 3488 thread
(00.001560) seccomp: Collected tid_real 3488 mode 0x2
(00.001562) Seizing 1967's 3489 thread
(00.001585) seccomp: Collected tid_real 3489 mode 0x2
(00.001587) Seizing 1967's 3490 thread
(00.001610) seccomp: Collected tid_real 3490 mode 0x2
(00.001611) Seizing 1967's 3491 thread
(00.001633) seccomp: Collected tid_real 3491 mode 0x2
(00.001634) Seizing 1967's 3492 thread
(00.001654) seccomp: Collected tid_real 3492 mode 0x2
(00.001655) Seizing 1967's 3493 thread
(00.001679) seccomp: Collected tid_real 3493 mode 0x2
(00.001681) Seizing 1967's 3494 thread
(00.001706) seccomp: Collected tid_real 3494 mode 0x2
(00.001708) Seizing 1967's 3496 thread
(00.001732) seccomp: Collected tid_real 3496 mode 0x2
(00.001733) Seizing 1967's 3503 thread
(00.001758) seccomp: Collected tid_real 3503 mode 0x2
(00.001759) Seizing 1967's 3519 thread
(00.001779) seccomp: Collected tid_real 3519 mode 0x2
(00.001780) Seizing 1967's 3536 thread
(00.001804) seccomp: Collected tid_real 3536 mode 0x2
(00.001805) Seizing 1967's 3556 thread
(00.001830) seccomp: Collected tid_real 3556 mode 0x2
(00.001832) Seizing 1967's 8680 thread
(00.001851) seccomp: Collected tid_real 8680 mode 0x2
(00.001866) Collected (3 attempts, 0 in_progress)
(00.001943) Seized task 1973, state 0
(00.001966) seccomp: Collected tid_real 1973 mode 0x2
(00.001970) Collected (4 attempts, 0 in_progress)
(00.001975) Collected (4 attempts, 0 in_progress)
(00.001980) Collected 1973 in 1 state
(00.002073) Collected (3 attempts, 0 in_progress)
(00.002191) Collected 1967 in 1 state
(00.002254) Collected (3 attempts, 0 in_progress)
(00.002268) Collected 1936 in 1 state
(00.002271) Seized task 1937, state 0
(00.002350) seccomp: Collected tid_real 1937 mode 0
(00.002371) Collected (4 attempts, 0 in_progress)
(00.002397) Seized task 1938, state 0
(00.002481) seccomp: Collected tid_real 1938 mode 0
(00.002497) Collected (4 attempts, 0 in_progress)
(00.002515) Collected (4 attempts, 0 in_progress)
(00.002527) Collected 1938 in 1 state
(00.002529) Seized task 1940, state 0
(00.002594) seccomp: Collected tid_real 1940 mode 0
(00.002611) Collected (4 attempts, 0 in_progress)
(00.002629) Collected (4 attempts, 0 in_progress)
(00.002638) Collected 1940 in 1 state
(00.002640) Seized task 1943, state 0
(00.002705) seccomp: Collected tid_real 1943 mode 0
(00.002722) Collected (4 attempts, 0 in_progress)
(00.002746) Seized task 1997, state 0
(00.002817) seccomp: Collected tid_real 1997 mode 0x2
(00.002838) Seizing 1997's 1998 thread
(00.002908) seccomp: Collected tid_real 1998 mode 0x2
(00.002913) Seizing 1997's 1999 thread
(00.002979) seccomp: Collected tid_real 1999 mode 0x2
(00.002984) Seizing 1997's 2000 thread
(00.003048) seccomp: Collected tid_real 2000 mode 0x2
(00.003053) Seizing 1997's 8683 thread
(00.003120) seccomp: Collected tid_real 8683 mode 0x2
(00.003151) Collected (3 attempts, 0 in_progress)
(00.003204) Collected (4 attempts, 0 in_progress)
(00.003236) Collected 1997 in 1 state
(00.003241) Seized task 2005, state 0
(00.003317) seccomp: Collected tid_real 2005 mode 0x2
(00.003372) Seizing 2005's 2012 thread
(00.003444) seccomp: Collected tid_real 2012 mode 0x2
(00.003449) Seizing 2005's 2022 thread
(00.003520) seccomp: Collected tid_real 2022 mode 0x2
(00.003525) Seizing 2005's 2025 thread
(00.003591) seccomp: Collected tid_real 2025 mode 0x2
(00.003595) Seizing 2005's 2049 thread
(00.003657) seccomp: Collected tid_real 2049 mode 0x2
(00.003661) Seizing 2005's 2050 thread
(00.003723) seccomp: Collected tid_real 2050 mode 0x2
(00.003728) Seizing 2005's 2051 thread
(00.003790) seccomp: Collected tid_real 2051 mode 0x2
(00.003795) Seizing 2005's 2052 thread
(00.003853) seccomp: Collected tid_real 2052 mode 0x2
(00.003858) Seizing 2005's 2053 thread
(00.003919) seccomp: Collected tid_real 2053 mode 0x2
(00.003924) Seizing 2005's 2054 thread
(00.004024) seccomp: Collected tid_real 2054 mode 0x2
(00.004031) Seizing 2005's 2055 thread
(00.004124) seccomp: Collected tid_real 2055 mode 0x2
(00.004131) Seizing 2005's 3450 thread
(00.004235) seccomp: Collected tid_real 3450 mode 0x2
(00.004241) Seizing 2005's 3462 thread
(00.004311) seccomp: Collected tid_real 3462 mode 0x2
(00.004316) Seizing 2005's 3466 thread
(00.004404) seccomp: Collected tid_real 3466 mode 0x2
(00.004412) Seizing 2005's 3467 thread
(00.004501) seccomp: Collected tid_real 3467 mode 0x2
(00.004506) Seizing 2005's 3468 thread
(00.004592) seccomp: Collected tid_real 3468 mode 0x2
(00.004598) Seizing 2005's 3469 thread
(00.004682) seccomp: Collected tid_real 3469 mode 0x2
(00.004687) Seizing 2005's 3470 thread
(00.004752) seccomp: Collected tid_real 3470 mode 0x2
(00.004757) Seizing 2005's 3471 thread
(00.004819) seccomp: Collected tid_real 3471 mode 0x2
(00.004823) Seizing 2005's 3472 thread
(00.004910) seccomp: Collected tid_real 3472 mode 0x2
(00.004918) Seizing 2005's 3473 thread
(00.005005) seccomp: Collected tid_real 3473 mode 0x2
(00.005010) Seizing 2005's 3474 thread
(00.005078) seccomp: Collected tid_real 3474 mode 0x2
(00.005083) Seizing 2005's 3475 thread
(00.005145) seccomp: Collected tid_real 3475 mode 0x2
(00.005150) Seizing 2005's 3476 thread
(00.005211) seccomp: Collected tid_real 3476 mode 0x2
(00.005216) Seizing 2005's 3477 thread
(00.005290) seccomp: Collected tid_real 3477 mode 0x2
(00.005295) Seizing 2005's 3478 thread
(00.005358) seccomp: Collected tid_real 3478 mode 0x2
(00.005363) Seizing 2005's 3479 thread
(00.005425) seccomp: Collected tid_real 3479 mode 0x2
(00.005430) Seizing 2005's 3480 thread
(00.005497) seccomp: Collected tid_real 3480 mode 0x2
(00.005502) Seizing 2005's 3481 thread
(00.005567) seccomp: Collected tid_real 3481 mode 0x2
(00.005571) Seizing 2005's 8681 thread
(00.005635) seccomp: Collected tid_real 8681 mode 0x2
(00.005640) Seizing 2005's 8857 thread
(00.005701) seccomp: Collected tid_real 8857 mode 0x2
(00.005706) Seizing 2005's 8970 thread
(00.005773) seccomp: Collected tid_real 8970 mode 0x2
(00.005778) Seizing 2005's 8971 thread
(00.005840) seccomp: Collected tid_real 8971 mode 0x2
(00.005889) Collected (3 attempts, 0 in_progress)
(00.006002) Collected (4 attempts, 0 in_progress)
(00.006040) Collected 2005 in 1 state
(00.006041) Seized task 2006, state 0
(00.006063) seccomp: Collected tid_real 2006 mode 0x2
(00.006075) Seizing 2006's 2013 thread
(00.006100) seccomp: Collected tid_real 2013 mode 0x2
(00.006101) Seizing 2006's 2028 thread
(00.006120) seccomp: Collected tid_real 2028 mode 0x2
(00.006121) Seizing 2006's 2029 thread
(00.006138) seccomp: Collected tid_real 2029 mode 0x2
(00.006140) Seizing 2006's 2030 thread
(00.006157) seccomp: Collected tid_real 2030 mode 0x2
(00.006158) Seizing 2006's 2041 thread
(00.006176) seccomp: Collected tid_real 2041 mode 0x2
(00.006177) Seizing 2006's 2043 thread
(00.006195) seccomp: Collected tid_real 2043 mode 0x2
(00.006196) Seizing 2006's 2044 thread
(00.006213) seccomp: Collected tid_real 2044 mode 0x2
(00.006215) Seizing 2006's 2045 thread
(00.006237) seccomp: Collected tid_real 2045 mode 0x2
(00.006238) Seizing 2006's 2046 thread
(00.006256) seccomp: Collected tid_real 2046 mode 0x2
(00.006258) Seizing 2006's 2047 thread
(00.006275) seccomp: Collected tid_real 2047 mode 0x2
(00.006276) Seizing 2006's 2048 thread
(00.006294) seccomp: Collected tid_real 2048 mode 0x2
(00.006295) Seizing 2006's 8679 thread
(00.006314) seccomp: Collected tid_real 8679 mode 0x2
(00.006323) Collected (3 attempts, 0 in_progress)
(00.006369) Collected (4 attempts, 0 in_progress)
(00.006385) Collected 2006 in 1 state
(00.006386) Seized task 2007, state 0
(00.006410) seccomp: Collected tid_real 2007 mode 0x2
(00.006426) Seizing 2007's 2014 thread
(00.006448) seccomp: Collected tid_real 2014 mode 0x2
(00.006449) Seizing 2007's 2018 thread
(00.006468) seccomp: Collected tid_real 2018 mode 0x2
(00.006470) Seizing 2007's 2021 thread
(00.006490) seccomp: Collected tid_real 2021 mode 0x2
(00.006492) Seizing 2007's 2027 thread
(00.006511) seccomp: Collected tid_real 2027 mode 0x2
(00.006512) Seizing 2007's 2033 thread
(00.006532) seccomp: Collected tid_real 2033 mode 0x2
(00.006533) Seizing 2007's 2034 thread
(00.006552) seccomp: Collected tid_real 2034 mode 0x2
(00.006553) Seizing 2007's 2035 thread
(00.006574) seccomp: Collected tid_real 2035 mode 0x2
(00.006575) Seizing 2007's 2036 thread
(00.006594) seccomp: Collected tid_real 2036 mode 0x2
(00.006595) Seizing 2007's 2037 thread
(00.006614) seccomp: Collected tid_real 2037 mode 0x2
(00.006615) Seizing 2007's 2038 thread
(00.006634) seccomp: Collected tid_real 2038 mode 0x2
(00.006635) Seizing 2007's 2039 thread
(00.006654) seccomp: Collected tid_real 2039 mode 0x2
(00.006655) Seizing 2007's 8686 thread
(00.006674) seccomp: Collected tid_real 8686 mode 0x2
(00.006687) Collected (3 attempts, 0 in_progress)
(00.006724) Collected (4 attempts, 0 in_progress)
(00.006738) Collected 2007 in 1 state
(00.006748) Collected (3 attempts, 0 in_progress)
(00.006751) Collected 1943 in 1 state
(00.006761) Collected (3 attempts, 0 in_progress)
(00.006764) Collected 1937 in 1 state
(00.006765) Seized task 1972, state 0
(00.006789) seccomp: Collected tid_real 1972 mode 0
(00.006799) Seizing 1972's 1987 thread
(00.006818) seccomp: Collected tid_real 1987 mode 0
(00.006820) Seizing 1972's 1989 thread
(00.006839) seccomp: Collected tid_real 1989 mode 0
(00.006841) Seizing 1972's 1991 thread
(00.006859) seccomp: Collected tid_real 1991 mode 0
(00.006861) Seizing 1972's 4457 thread
(00.006880) seccomp: Collected tid_real 4457 mode 0
(00.006881) Seizing 1972's 8682 thread
(00.006900) seccomp: Collected tid_real 8682 mode 0
(00.006907) Collected (3 attempts, 0 in_progress)
(00.006926) Collected (4 attempts, 0 in_progress)
(00.006932) Collected 1972 in 1 state
(00.006995) Collected (3 attempts, 0 in_progress)
(00.007027) Collected 1928 in 1 state
(00.007028) Seized task 1930, state 0
(00.007050) seccomp: Collected tid_real 1930 mode 0
(00.007056) Seizing 1930's 1933 thread
(00.007076) seccomp: Collected tid_real 1933 mode 0
(00.007082) Collected (3 attempts, 0 in_progress)
(00.007090) Collected (4 attempts, 0 in_progress)
(00.007095) Collected 1930 in 1 state
(00.007096) Seized task 1932, state 0
(00.007116) seccomp: Collected tid_real 1932 mode 0
(00.007120) Collected (4 attempts, 0 in_progress)
(00.007126) Collected (4 attempts, 0 in_progress)
(00.007129) Collected 1932 in 1 state
(00.007137) Collected (3 attempts, 0 in_progress)
(00.007139) Collected 1904 in 1 state
(00.007298) Error (criu/namespaces.c:423): Can't dump nested pid
namespace for 1937
(00.007300) Error (criu/namespaces.c:661): Can't make pidns id
(00.007302) Unlock network
(00.007304) Unfreezing tasks into 1
(00.007305) Unseizing 1904 into 1
(00.007307) Unseizing 1928 into 1
(00.007352) Unseizing 1936 into 1
(00.007356) Unseizing 1967 into 1
(00.007414) Unseizing 1973 into 1
(00.007416) Unseizing 1937 into 1
(00.007419) Unseizing 1938 into 1
(00.007421) Unseizing 1940 into 1
(00.007424) Unseizing 1943 into 1
(00.007427) Unseizing 1997 into 1
(00.007437) Unseizing 2005 into 1
(00.007551) Unseizing 2006 into 1
(00.007599) Unseizing 2007 into 1
(00.007643) Unseizing 1972 into 1
(00.007657) Unseizing 1930 into 1
(00.007662) Unseizing 1932 into 1
(00.007715) Error (criu/cr-dump.c:1768): Dumping FAILED.
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