linux-kernel - Re: [rfc 2/3] fs, proc: Introduce the Children: line in /proc/<pid>/status

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Message-ID: <20111202124551.GD14515@moon>
Date:	Fri, 2 Dec 2011 16:45:51 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Pavel Emelyanov <xemul@...allels.com>
Cc:	Pedro Alves <pedro@...esourcery.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Andrew Vagin <avagin@...nvz.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Vasiliy Kulikov <segoon@...nwall.com>
Subject: Re: [rfc 2/3] fs, proc: Introduce the Children: line in
 /proc/<pid>/status

On Fri, Dec 02, 2011 at 04:43:10PM +0400, Pavel Emelyanov wrote:
...
> >>
> >> Yes, I like /children file. other points seems to be pointed out by other
> >> reviewers. 
> > 
> > Any reason this is a file instead of a directory like /proc/PID/task/ ?
> > 
> > $ sudo ls /proc/8167/task/
> > 8167  854  855  856  857  858  859
> > $ sudo ls /proc/8167/task/855/
> > attr    clear_refs  cpuset   exe     io       loginuid  mountinfo  oom_adj        pagemap      sched      smaps  statm    wchan
> > auxv    cmdline     cwd      fd      latency  maps      mounts     oom_score      personality  schedstat  stack  status
> > cgroup  comm        environ  fdinfo  limits   mem       numa_maps  oom_score_adj  root         sessionid  stat   syscall
> > 
> > Much easier to follow the chain from the command line this way.
> 
> What do you propose to put into these directories? Another directories named with
> children pid-s?
> 

Yes, I suppose additional directory/links and whatever would be just
noneeded overhead.

	Cyrill
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