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From: "Shi, Yang" <yang.shi@linaro.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: gregkh@linuxfoundation.org, tj@kernel.org, lizefan@huawei.com,
	tglx@linutronix.de, bigeasy@linutronix.de,
	linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
	linaro-kernel@lists.linaro.org
Subject: Re: [RFC PATCH] kernfs: create raw version kernfs_path_len and kernfs_path
Date: Fri, 26 Feb 2016 12:23:17 -0800	[thread overview]
Message-ID: <56D0B435.4080309@linaro.org> (raw)
In-Reply-To: <20160226151503.39d39e45@gandalf.local.home>

On 2/26/2016 12:15 PM, Steven Rostedt wrote:
> On Fri, 26 Feb 2016 11:59:40 -0800
> "Shi, Yang" <yang.shi@linaro.org> wrote:
>
>
>> BTW, it sounds this is not the only point where kernfs_node could be
>> updated, __kernfs_remove should need synchronize_sched too.
>>
>
> Question is, can the kernfs of a cgroup be removed while the cgroup is
> still active?

Hmm, it sounds unlikely to me.

Yang


>
> I don't see the kernfs_rename_lock being held anywhere in that
> remove. If it can be an issue there with this patch, then it's an issue
> today, because the kernfs_mutex is not held by the tracepoint.
>
> -- Steve
>

  reply	other threads:[~2016-02-26 20:23 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-26 18:15 [RFC PATCH] kernfs: create raw version kernfs_path_len and kernfs_path Yang Shi
2016-02-26 18:56 ` Steven Rostedt
2016-02-26 19:37   ` Shi, Yang
2016-02-26 19:59     ` Shi, Yang
2016-02-26 20:15       ` Steven Rostedt
2016-02-26 20:23         ` Shi, Yang [this message]
2016-02-26 20:16       ` Shi, Yang

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