linux-kernel - Re: [PATCH] cgroup: fix to allow mounting a hierarchy by name

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Date:	Wed, 28 Dec 2011 08:36:31 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>
Subject: Re: [PATCH] cgroup: fix to allow mounting a hierarchy by name

Hello, Li.

On Wed, Dec 28, 2011 at 02:10:42PM +0800, Li Zefan wrote:
> The "name" option was introduced along with the "none" option, so we
> can distinguish between different cgroup hierarchies which have no
> bound subsystems, like this:
> 
> 	# mount -t cgroup -o none,name=hier1 xxx /cgroup1
> 	# mount -t cgroup -o none,name=hier2 xxx /cgroup2
> 
> As the name is unique, we have this "mount by hierarchy name" feature.

I could be missing something but does that add anything other than
naming convenience?

> It looks reasonable, but I guess few people know this feature. We can
> live with it, as it only saves us some typing when mounting an existing
> hierarchy. On the other hand, removing this small feature can hardly
> result in code reduction.

If it's a redundant feature which has been broken over a year without
anyone complaining, it really doesn't need to exist.  It might not
save a lot of code but would save some WTH moments.

Thanks.

-- 
tejun
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