Re: [PATCH] cgroup: Fixes the un-paired cgroup lock problem

From: Li Zefan
Date: Wed Nov 04 2009 - 00:12:35 EST

Liu Aleaxander wrote:
> From: Liu Aleaxander <Aleaxander@xxxxxxxxx>
> Date: Wed, 4 Nov 2009 09:27:06 +0800
> Subject: [PATCH] Fixes the un-paired cgroup lock problem
> In cgroup_lock_live_group, it locks the cgroup by mutex_lock, while in the
> cgroup_tasks_write, it unlock it by cgroup_unlock. Even though they are
> equal, but I do think we should make it pair.
> BTW, should we replace others with cgroup_lock and cgroup_unlock?
> Since we already have a wrapper one and it's meaningful.

Before I read the email body, I thought there is a bug where
there is a lock without unlock or vise versa.

I agree the case here can be called "unpaired", but I'm not
convinced this patch is needed. The code is not buggy or
confusing. So the patch neither fixes a bug nor make the code
more readable.

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