Re: [PATCH 3/5] cgroup: only need to check oldcgrp==newgrp once

[Li Zefan]

Mandeep Singh Baines wrote:
> In cgroup_attach_proc it is now sufficient to only check that
> oldcgrp==newcgrp once. Now that we are using threadgroup_lock()
> during the migrations, oldcgrp will not change.
> 
> Signed-off-by: Mandeep Singh Baines <msb@xxxxxxxxxxxx>

Reviewed-by: Li Zefan <lizf@xxxxxxxxxxxxxx>

> Cc: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Li Zefan <lizf@xxxxxxxxxxxxxx>
> Cc: containers@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Cc: cgroups@xxxxxxxxxxxxxxx
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Paul Menage <paul@xxxxxxxxxxxxxx>
> ---
>  kernel/cgroup.c |   17 ++++++-----------
>  1 files changed, 6 insertions(+), 11 deletions(-)
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