RE: [PATCHv3 2/2] /proc/PID/status: show all sets of pid according to ns

Chen, Hanxiao
2014-09-26T10:20:29Z

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Hi,

> -----Original Message-----
> From: containers-bounces@lists.linux-foundation.org
> [mailto:containers-bounces@lists.linux-foundation.org] On Behalf Of Chen
> Hanxiao
> Sent: Wednesday, September 24, 2014 6:00 PM
> To: containers@lists.linux-foundation.org; linux-kernel@vger.kernel.org
> Cc: Richard Weinberger; Serge Hallyn; Oleg Nesterov; Mateusz Guzik; David Howells;
> Eric W. Biederman
> Subject: [PATCHv3 2/2] /proc/PID/status: show all sets of pid according to ns
>
> If some issues occurred inside a container guest, host user
> could not know which process is in trouble just by guest pid:
> the users of container guest only knew the pid inside containers.
> This will bring obstacle for trouble shooting.
>
> This patch adds four fields: NStgid, NSpid, NSpgid and NSsid:
> a) In init_pid_ns, nothing changed;
>
> b) In one pidns, will tell the pid inside containers:
> NStgid: 21776 5 1
> NSpid: 21776 5 1
> NSpgid: 21776 5 1
> NSsid: 21729 1 0
> ** Process id is 21776 in level 0, 5 in level 1, 1 in level 2.
>
> c) If pidns is nested, it depends on which pidns are you in.
> NStgid: 5 1
> NSpid: 5 1
> NSpgid: 5 1
> NSsid: 1 0
> ** Views from level 1
>

This patch is simple, useful and safe.
But currently there is not any feedbacks.

Any comments or ideas?

Thanks,
- Chen
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