[Devel] [RFC][PATCH] Add child reaper to struct pspace

[Kirill Korotaev]

Eric W. Biederman wrote:
> Kirill Korotaev <dev at sw.ru> writes:
> 
> 
>>>I guess we need to maintain a list of task_structs in the pspace and walk
>>>that list. Will work on that as a separate patch.
>>
>>wait. we either need to have a list of _pids_ or it
>>should be called task_namespace, not pid, since we are adding more 
>>code related to tasks.
> 
> 
> There will be a way to iterate through all of the pids.
> 
> It will probably be through a linked list of struct pid, but
> it may be an in order traversal of some pid related data structure.
> 
> I was hoping for a moment I might be able to only implement one
> struct pid, but I need some method to perform a reverse lookup
> from struct pid to a (struct pid_namespace, pid_t) pair to
> properly implement pid_nr().  A linked list of struct pid entries
> is the obvious implementation.
I guess there will be a need of list of tasks... not of pids only...
many of loops like do_each_thread()/while_each_thread() has nothing to do with pids
and should be narrowed down to loop through the container.

Does this logic belong to pid_ns? if yes, then it definetely should be called
task_ns.

Kirill