[CRIU] [PATCH 1/4] Support for dumping/restoring user namespaces

[Pavel Emelyanov]

On 08/18/2014 07:31 PM, Ying Han wrote:

> 
> ​Sophie finished her internship last week, and ​remove her email from here which won't work from this moment.

If you could thank Sophie for me for the great job she did, that would be awesome :)

> Pavel, I think you have merged all the patches she recently pushed and the remaining ones are the actual
> user namespace support which also being covered by Andrew's patches. So let us know what you guys need
> help with and we will follow-up from there.

First of all, I'd appreciate if someone from Google kernel people support this change:
https://lkml.org/lkml/2014/8/4/570 . This thing is known to block _any_ attempt to
restore tasks in user namespaces and it's somehow stuck on the mailing lists :)

Other than this, right now the list of "what we know" is at http://criu.org/Userns
AFAIS all items but #1 are resource-specific, i.e. if applications we c/r don't use e.g.
inotifies, we won't hit the "open_by_handle_at and linkat(AT_EMPTY_PATH)" problem. Thus,
we can work on this list in parallel.

But in order to do so effectively, it would be great to "materialize" this list :) So
I'd like to have someone (see below) to tune the zdtm test-suite to explicitly list tests 
that are known not to work inside user-namespaces, and run the rest inside userns. After
that we can fix the known problems one-by-one.

Now, why I say "someone" :) I cannot plan Andrey's time, since I'm not his manager. Thus,
I'd like to hear your and Andrew's opinion about who can start looking at the zdtm.


Thanks,
Pavel