From: Oleg Nesterov <oleg@redhat.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Pavel Emelyanov <xemul@parallels.com>,
Serge Hallyn <serge.hallyn@canonical.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Tejun Heo <tj@kernel.org>, Andrew Vagin <avagin@openvz.org>,
Vasiliy Kulikov <segoon@openwall.com>
Subject: Re: [RFC] fs, proc: Introduce /proc/<pid>/task/<tid>/children entry v6
Date: Thu, 19 Jan 2012 16:55:29 +0100 [thread overview]
Message-ID: <20120119155529.GA14412@redhat.com> (raw)
In-Reply-To: <20120119141051.GA9652@redhat.com>
On 01/19, Oleg Nesterov wrote:
>
> On 01/18, Cyrill Gorcunov wrote:
> >
> > I suppose it might be something like below. I've updated comment and
> > quoted your comment there just I wont forget this next time I'll be
> > reading the source. Thanks!
>
> I believe the patrch is correct.
>
> But... Cyrill, I am wondering how much will you hate me if I make
> yet another attempt to delay this patch.
Cough... and another attempt...
> > +static int children_seq_open(struct inode *inode, struct file *file)
> > +{
> > + struct proc_pid_children_iter *iter = NULL;
> > + struct task_struct *task = NULL;
> > + int ret = 0;
> > +
> > + task = get_proc_task(inode);
> > + if (!task) {
> > + ret = -ENOENT;
> > + goto err;
> > + }
>
> For what??
>
> > + if (!ret) {
> > + struct seq_file *m = file->private_data;
> > + m->private = iter;
> > +
> > + iter->pid_start = get_pid(task_pid(task));
>
> This is what we need, right? So can't we remove this "task_struct *task"
> and simply do
>
> iter->pid_start = get_ppid(proc_pid(inode));
>
> ?
>
> And while this is absolutely cosmetic probably ->parent_pid is
> a bit better name, but this is up to you.
Thinking more... I am not sure, but do we really need
proc_pid_children_iter at all??
It is very possibly I missed something, but we can get both
parent_pid and pid_ns from inode, right? so can't we just remember
inode in seq->private?
Oleg.
next prev parent reply other threads:[~2012-01-19 16:01 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-16 15:32 [RFC] fs, proc: Introduce /proc/<pid>/task/<tid>/children entry v6 Cyrill Gorcunov
2012-01-16 16:11 ` Oleg Nesterov
2012-01-16 16:20 ` Cyrill Gorcunov
2012-01-17 17:40 ` Oleg Nesterov
2012-01-17 17:57 ` Cyrill Gorcunov
2012-01-17 18:14 ` Oleg Nesterov
2012-01-17 18:30 ` Cyrill Gorcunov
2012-01-17 21:38 ` KOSAKI Motohiro
2012-01-18 9:43 ` Cyrill Gorcunov
2012-01-18 13:58 ` Oleg Nesterov
2012-01-18 14:21 ` Cyrill Gorcunov
2012-01-18 14:36 ` Oleg Nesterov
2012-01-18 18:23 ` Cyrill Gorcunov
2012-01-18 19:07 ` Cyrill Gorcunov
2012-01-19 14:10 ` Oleg Nesterov
2012-01-19 14:47 ` Cyrill Gorcunov
2012-01-19 15:55 ` Oleg Nesterov [this message]
2012-01-19 16:27 ` Cyrill Gorcunov
2012-01-19 16:44 ` Oleg Nesterov
2012-01-19 17:07 ` Cyrill Gorcunov
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