Re: [PATCH v2] ptrace: add PTRACE_GET_RSEQ_CONFIGURATION request

* Mathieu Desnoyers:

This way, the configuration structure can be expanded in the future. The
rseq ABI structure is by definition fixed-size, so there is no point in
having its size here.

Florian, did I understand your request correctly, or am I missing your
point ?

No, the idea was that if the kernel ever supports different rseq ABI
sizes on registration (it could as there's a size argument to the rseq
system call), that needs to be communicated to CRIU, so that it restores
with the right size.

I haven't thought about whether it makes sense to make the ptrace
argument struct extensible.

Thanks,
Florian