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Date: Tue, 15 Sep 2015 09:37:30 +0200
From: Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH 1/2] memcg: flatten task_struct->memcg_oom
Message-ID: <20150915073730.GD2858@cmpxchg.org>
References: <20150913185940.GA25369@htj.duckdns.org>
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To: Tejun Heo <tj@kernel.org>
Cc: akpm@linux-foundation.org, mhocko@kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, vdavydov@parallels.com, kernel-team@fb.com

On Sun, Sep 13, 2015 at 02:59:40PM -0400, Tejun Heo wrote:
> task_struct->memcg_oom is a sub-struct containing fields which are
> used for async memcg oom handling.  Most task_struct fields aren't
> packaged this way and it can lead to unnecessary alignment paddings.
> This patch flattens it.
> 
> * task.memcg_oom.memcg          -> task.memcg_in_oom
> * task.memcg_oom.gfp_mask	-> task.memcg_oom_gfp_mask
> * task.memcg_oom.order          -> task.memcg_oom_order
> * task.memcg_oom.may_oom        -> task.memcg_may_oom
> 
> In addition, task.memcg_may_oom is relocated to where other bitfields
> are which reduces the size of task_struct.
> 
> Signed-off-by: Tejun Heo <tj@kernel.org>
> Acked-by: Michal Hocko <mhocko@suse.com>
> Reviewed-by: Vladimir Davydov <vdavydov@parallels.com>

Looks good to me, thanks.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>

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