linux-kernel - RE: [PATCHv5] procfs: show hierarchy of pid namespace

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Message-ID: <5871495633F38949900D2BF2DC04883E5F6039@G08CNEXMBPEKD02.g08.fujitsu.local>
Date:	Tue, 21 Oct 2014 09:55:39 +0000
From:	"Chen, Hanxiao" <chenhanxiao@...fujitsu.com>
To:	"Chen, Hanxiao" <chenhanxiao@...fujitsu.com>,
	"containers@...ts.linux-foundation.org" 
	<containers@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	Richard Weinberger <richard.weinberger@...il.com>,
	Serge Hallyn <serge.hallyn@...ntu.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Mateusz Guzik <mguzik@...hat.com>,
	David Howells <dhowells@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: RE: [PATCHv5] procfs: show hierarchy of pid namespace



> -----Original Message-----
> From: containers-bounces@...ts.linux-foundation.org
> [mailto:containers-bounces@...ts.linux-foundation.org] On Behalf Of Chen
> Hanxiao
> Sent: Thursday, October 16, 2014 8:02 PM
> To: containers@...ts.linux-foundation.org; linux-kernel@...r.kernel.org
> Cc: Richard Weinberger; Serge Hallyn; Oleg Nesterov; Mateusz Guzik; David Howells;
> Eric W. Biederman
> Subject: [PATCHv5] procfs: show hierarchy of pid namespace
> 
> We lack of pid hierarchy information, and this will lead to:
> a) we don't know pids' relationship, who is whose child:
>    /proc/PID/ns/pid only tell us whether two pids live in same ns;
> b) bring trouble to nested lxc container check/restore/migration
> c) bring trouble to pid translation between containers;
> 
> This patch will show the hierarchy of pid namespace
> by pidns_hierarchy like:
> 

Any comments?

Thanks,
- Chen