[CRIU] CRIU built without CONFIG_COMPAT - can't C/R compatible tasks

[Radostin Stoyanov]

Hi Damodharan,

On 21/12/2019 23:48, Damodharan Mohanrajan wrote:
> Dear team,
>         I got an error message when i ran '$criu check --all' command. 
> I haveincluded the details as below. Please help me with this. I'm 
> struck on my university thesis and have to finish and submit by next 
> week. A great thanks to you for anyhelp you do. I'm ready to give any 
> further details from my side.
>
> Command: $ sudo criu check --all
>
> Error:
> Warn  (criu/cr-check.c:850): Dirty tracking is OFF. Memory snapshot 
> will not work.
> Warn  (criu/cr-check.c:1231): Do not have API to map vDSO - will use 
> mremap() to restore vDSO
> Warn  (criu/cr-check.c:1199): CRIU built without CONFIG_COMPAT - can't 
> C/R compatible tasks
> Looks good but some kernel features are missing
> which, depending on your process tree, may cause
> dump or restore failure.
>
As the message above indicates, some features in your kernel are not 
enabled. In order to enable these you will need to recompile your kernel.

https://criu.org/Linux_kernel

However, these features are not compulsory for checkpoint/restore and 
you might be able to achieve container migration using this kernel. I 
would recommend to first try with a simple Alpine container.

> Details are below:
>
> My device: Raspberry pi-4 (4GB version) (Arm64 based)
> My platform(OS): ubuntu-19.10-preinstalled-server-arm64+raspi3.img
> Output of $uname -r : 5.3.0-1007-raspi2
> Output of $uname -a: Linux server-2 5.3.0-1007-raspi2 #8-Ubuntu SMP 
> Thu Oct 10 12:42:47 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
> I'm Trying to achieve Live Lxc container migration from one raspberry 
> pi to another raspberry pi.
> I've downloaded the dependencies, git clone as per the instructions in 
> the website and did '$make' and '$make install' commands.
>
> -- 
> Thanks & Regards
> Damodharan.
>
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