[CRIU] [PATCH v4 1/3] net/sysctl: c/r all except *.conf.* and *.neigh.*

[Pavel Emelyanov]

On 07/20/2016 05:27 PM, Pavel Tikhomirov wrote:
> Add array of sysctls which we need(r/w in netns) to dump by name along
> with their types, add NamedSysctlEntry'es to dump sysctl name+value
> pairs to image
> 
> Skip:
> 1. non-(readable)writable sysctls as we can do nothing for them through
> procfs
> 2. conf and neigh directories are per-device and will be restored after
> devices restore separately, also they might need special care like conf
> sysctls need special order
> 3. nf_log.xx if it is "NONE" as we can not set it with sysctl_op as
> sysctl_write_char prints "\n" at the end and nf_log_proc_dostring does
> not like '\n' for now, to fix it, sent patch "[v2]netfilter: nf_log:
> fix error on write NONE to logger choice sysctl"
> 
> Not skip: "igmp_link_local_mcast_reports" - !DANGEROUS! to use criu on
> kernels v4.3-v4.5, @xemul: "we just suggest one to add the fixing
> patch to kernel", so fixing patch is: commit 87a8a2ae65b7 ("igmp:
> Namespaceify igmp_llm_reports sysctl knob"), see more in RHBZ#1352177
> 
> *We have now 32 such net.* sysctls writable in VZ7 CT

How about upstream Linux kernel? What's the list of virtualized sysctls in there?