Re: [RFC] on general object IDs again

[KOSAKI Motohiro]

> Hi Kosaki,
>
> the idea on user-space is something like
>
>  - collect all pids to dump
>  - collect IDs for every pid
>  - sort the IDs obtained
>  - find the same IDs (which will be kind of find intersections in a sets of IDs) and
>   set up CLONE_ flags on restore procedure as appropriate (for example if
>   GEN_OBJ_ID_VM IDs for two or more tasks are the same we need to use CLONE_VM
>   at restore time, and so on).

Then, you only need to compare. not any other calculation. i.e. only
need id uniqueness.
And any resource are referenced from tasks. so, can you reuse pid for
this? example,
two taska share one mm.

task-a(pid: 100)
              |-----------------mm
task-b(pid: 200)


gen_obj_id(task-b, GEN_OBJ_ID_VM) return 100. (youngest pid of referenced tasks)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/