Re: [RFC PATCH] kernfs: create raw version kernfs_path_len and kernfs_path

[Shi, Yang]

On 2/26/2016 12:15 PM, Steven Rostedt wrote:
> On Fri, 26 Feb 2016 11:59:40 -0800
> "Shi, Yang" <yang.shi@xxxxxxxxxx> 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