[CRIU] [aarch64] CRIU hangs on dump

[Anton Kozlov]

Hi!

I experience a problem with CRIU on aarch64, on making a dump of
Simple Loop (isolated or shell-job), it hangs and starts to print warnings
after some time.

Last lines of dump -vvv is
(00.021967) 0x7f7c3a2000-0x7f7c3a6000 (16K) prot 0x1 flags 0x2 fdflags 0 st
0x41 off 0x12d000 reg fp  shmid: 0x2
(00.021983) 0x7f7c3a6000-0x7f7c3a8000 (8K) prot 0x3 flags 0x2 fdflags 0 st
0x41 off 0x131000 reg fp  shmid: 0x2
(00.021998) 0x7f7c3a8000-0x7f7c3ac000 (16K) prot 0x3 flags 0x22 fdflags 0
st 0x201 off 0 reg ap  shmid: 0
(00.022014) 0x7f7c3c7000-0x7f7c3e3000 (112K) prot 0x5 flags 0x2 fdflags 0
st 0x41 off 0 reg fp  shmid: 0x3
(00.022030) 0x7f7c3ed000-0x7f7c3f1000 (16K) prot 0x3 flags 0x22 fdflags 0
st 0x201 off 0 reg ap  shmid: 0
(00.022046) 0x7f7c3f1000-0x7f7c3f2000 (4K) prot 0x5 flags 0x22 fdflags 0 st
0x209 off 0 reg vdso ap  shmid: 0
(00.022061) 0x7f7c3f2000-0x7f7c3f3000 (4K) prot 0x1 flags 0x22 fdflags 0 st
0x1201 off 0 reg vvar ap  shmid: 0
(00.022076) 0x7f7c3f3000-0x7f7c3f4000 (4K) prot 0x1 flags 0x2 fdflags 0 st
0x41 off 0x1c000 reg fp  shmid: 0x3
(00.022092) 0x7f7c3f4000-0x7f7c3f6000 (8K) prot 0x3 flags 0x2 fdflags 0 st
0x41 off 0x1d000 reg fp  shmid: 0x3
(00.022108) 0x7fdb414000-0x7fdb436000 (136K) prot 0x3 flags 0x122 fdflags 0
st 0x201 off 0 reg ap  shmid: 0
(00.022123) ----------------------------------------
(00.022136)
(00.022148) Collecting fds (pid: 17785)
(00.022160) ----------------------------------------
(00.022229) Found 4 file descriptors
(00.022245) ----------------------------------------
(00.022632) MemFD parasite doesn't work, goto legacy mmap
(00.022798) Putting parasite blob into 0x7f7d5b0000->0x7f7c3bc000
(00.022888) Dumping GP/FPU registers for 17785
(00.022921) Putting tsock into pid 17785
(120.023060 Warn  (criu/parasite-syscall.c:523): blocked for more than 120
seconds
...

CRIU version 2.10 (similar behavior on 2.9)

Kernel:
Linux odroid64-001 3.14.79+ #2 SMP PREEMPT Tue Jan 17 13:49:14 MSK 2017
aarch64 aarch64 aarch64 GNU/Linux

Output of `criu check':
Warn  (criu/autofs.c:79): Failed to find pipe_ino option (old kernel?)
Info  prctl: PR_SET_MM_MAP_SIZE is not supported
Looks good.

Could you help with this?

Thanks,
Anton
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