linux-kernel - Re: [PATCH 04/10] mm, oom_adj: make sure processes sharing mm have same view of oom_score

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Message-ID: <20160615150321.GD7944@redhat.com>
Date:	Wed, 15 Jun 2016 17:03:21 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Michal Hocko <mhocko@...nel.org>
Cc:	linux-mm@...ck.org,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	David Rientjes <rientjes@...gle.com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH 04/10] mm, oom_adj: make sure processes sharing mm have
 same view of oom_score_adj

On 06/09, Michal Hocko wrote:
>
> +			if (!p->vfork_done && process_shares_mm(p, mm)) {
> +				pr_info("updating oom_score_adj for %d (%s) from %d to %d because it shares mm with %d (%s). Report if this is unexpected.\n",
> +						task_pid_nr(p), p->comm,
> +						p->signal->oom_score_adj, oom_adj,
> +						task_pid_nr(task), task->comm);
> +				p->signal->oom_score_adj = oom_adj;

Personally I like this change.

And. I think after this change we can actually move ->oom_score_adj into mm_struct,
but lets discuss this later.

Oleg.