linux-kernel - Re: [PATCH 2/3] teach set_special

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Message-ID: <20071126201757.GB84@tv-sign.ru>
Date:	Mon, 26 Nov 2007 23:17:57 +0300
From:	Oleg Nesterov <oleg@...sign.ru>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...nvz.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] teach set_special_pids() to use struct pid

On 11/26, Eric W. Biederman wrote:
>
> Oleg Nesterov <oleg@...sign.ru> writes:
> 
> > -	set_special_pids(1, 1);
> > +	if (current->nsproxy != &init_nsproxy) {
> > +		get_nsproxy(&init_nsproxy);
> > +		switch_task_namespaces(current, &init_nsproxy);
> > +	}
> 
> Is there a reason for moving this hunk of code?
> 
> I don't see one as set_special_pids does everything with either
> struct pid or global pid values.  And attach_pid and detach_pid
> don't care.

No particular reason, except "keep related code together".

There was another minor reason. Without the next patch we are doing find_pid(1).
This is correct, we scan the global namespace, but still it looks a bit tidier
to switch namespace first, so we could use find_vpid() in unlikely case we need
it.

Oleg.

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