Re: [PATCH 3/8] cgroup: use cgroup_lock_live_group(parent) in cgroup_create()

[Tejun Heo]

Hey, Michal.

On Thu, Nov 1, 2012 at 2:16 AM, Michal Hocko <mhocko@xxxxxxx> wrote:
> I am not sure I understand. What does deactivate_super has to do with
> the above suggestion? cgroup_lock_live_group will take the cgroup_mutex
> on the success or frees the previously allocated&unused memory. The
> only thing I was suggesting is to do cgroup_lock_live_group first and
> allocate the cgroup only if it doesn't fail.

It complicates updates to the error exit path. You end up having to
update a lot more and it's not like grabbing lock first is
substantially better in any way, so why bother?

Thanks.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/