Re: [PATCH 1/2] cgroup: Remove unnecessary task_lock before fetchingcss_set on migration

[Frederic Weisbecker]

On Tue, Dec 20, 2011 at 11:14:43AM -0800, Tejun Heo wrote:
> Hello, Frederic.
> 
> On Tue, Dec 20, 2011 at 08:01:12PM +0100, Frederic Weisbecker wrote:
> > When we fetch the css_set of the tasks on cgroup migration, we don't need
> > anymore to synchronize against cgroup_exit() that could swap the old one
> > with init_css_set. Now that we are using threadgroup_lock() during
> > the migrations, we don't need to worry about it anymore.
> > 
> > Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> > Cc: Tejun Heo <tj@xxxxxxxxxx>
> > Cc: Li Zefan <lizf@xxxxxxxxxxxxxx>
> > Cc: Containers <containers@xxxxxxxxxxxxxxxxxxxxxxxxxx>
> > Cc: Cgroups <cgroups@xxxxxxxxxxxxxxx>
> > Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> > Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> > Cc: Paul Menage <paul@xxxxxxxxxxxxxx>
> > Cc: Mandeep Singh Baines <msb@xxxxxxxxxxxx>
> 
> I like this but it doesn't apply on top of cgroup/for-3.3.  It
> collides with Mandeep's patch.  Can you please rebase?

Yeah it was made on top of last Mandeep's patch. Let me
rebase on top of your branch, will resend soon.

Thanks.

> 
> Li, can you please ack?
> 
> Thanks.
> 
> -- 
> tejun
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