linux-kernel - Re: [PATCH] cgroup: fix bogus kernel warnings when cgroup

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Message-ID: <20130123002950.GC5359@htj.dyndns.org>
Date:	Tue, 22 Jan 2013 16:29:50 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizefan@...wei.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>
Subject: Re: [PATCH] cgroup: fix bogus kernel warnings when cgroup_create()
 failed

On Mon, Jan 21, 2013 at 06:18:33PM +0800, Li Zefan wrote:
> If cgroup_create() failed and cgroup_destroy_locked() is called to
> do cleanup, we'll see a bunch of warnings:
> 
> cgroup_addrm_files: failed to remove 2MB.limit_in_bytes, err=-2
> cgroup_addrm_files: failed to remove 2MB.usage_in_bytes, err=-2
> cgroup_addrm_files: failed to remove 2MB.max_usage_in_bytes, err=-2
> cgroup_addrm_files: failed to remove 2MB.failcnt, err=-2
> cgroup_addrm_files: failed to remove prioidx, err=-2
> cgroup_addrm_files: failed to remove ifpriomap, err=-2
> ...
> 
> We failed to remove those files, because cgroup_create() has failed
> before creating those cgroup files.
> 
> To fix this, we simply don't warn if cgroup_rm_file() can't find the
> cft entry.
> 
> Signed-off-by: Li Zefan <lizefan@...wei.com>

Applied to cgroup/for-3.9.  Thanks!

-- 
tejun
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