[Devel] Re: [PATCH 0/13] Pid namespaces (OpenVZ view)

[Kirill Korotaev]

Pavel Emelianov wrote:

>>> Though I haven't
>>>seen any problems with glibc for many years running OpenVZ and I think,
>>>that if glibc will want to cache this getpid() value we can teach it to
>>>uncache this value in case someone called unshare() with CLONE_NEWPIDS.
>>
>>glibc very much caches the results of getpid().
> 
> 
> Can you prove it? We have run OpenVZ for many years and with many
> userspace configurations and we haven't seen the problems with
> glibc ever.

Pavel, but we always do full namespace entering with fork()'s and such
actions. So we simply couldn't trigger getpid() caching.

Thanks,
Kirill