linux-kernel - Re: [PATCH -mm] remove node_ prefix

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Message-Id: <20080521220657.12e8e8c9.akpm@linux-foundation.org>
Date:	Wed, 21 May 2008 22:06:57 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Cedric Le Goater <clg@...ibm.com>
Cc:	"Serge E. Hallyn" <serue@...ibm.com>,
	Paul Menage <menage@...gle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Containers <containers@...ts.osdl.org>
Subject: Re: [PATCH -mm] remove node_ prefix_from ns subsystem

On Wed, 21 May 2008 17:47:21 +0200 Cedric Le Goater <clg@...ibm.com> wrote:

> From: Cedric Le Goater <clg@...ibm.com>
> 
> This is a slight change in the namespace cgroup subsystem api.
> 

What are the reasons for making this change?

> ---
>  kernel/cgroup.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: 2.6.26-rc2-mm1/kernel/cgroup.c
> ===================================================================
> --- 2.6.26-rc2-mm1.orig/kernel/cgroup.c
> +++ 2.6.26-rc2-mm1/kernel/cgroup.c
> @@ -2903,7 +2903,7 @@ int cgroup_clone(struct task_struct *tsk
>  	cg = tsk->cgroups;
>  	parent = task_cgroup(tsk, subsys->subsys_id);
>  
> -	snprintf(nodename, MAX_CGROUP_TYPE_NAMELEN, "node_%d", tsk->pid);
> +	snprintf(nodename, MAX_CGROUP_TYPE_NAMELEN, "%d", tsk->pid);
>  
>  	/* Pin the hierarchy */
>  	atomic_inc(&parent->root->sb->s_active);

This is user-visible, isn't it?  Been there since October.  How can we
safely change it now?

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