linux-kernel - Re: [PATCH v13 2/2] Add oom victim's memcg to the oom context information

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Date:   Fri, 13 Jul 2018 15:22:17 -0700 (PDT)
From:   David Rientjes <rientjes@...gle.com>
To:     ufo19890607@...il.com
cc:     akpm@...ux-foundation.org, mhocko@...e.com,
        kirill.shutemov@...ux.intel.com, aarcange@...hat.com,
        penguin-kernel@...ove.sakura.ne.jp, guro@...com,
        yang.s@...baba-inc.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, yuzhoujian@...ichuxing.com
Subject: Re: [PATCH v13 2/2] Add oom victim's memcg to the oom context
 information

On Fri, 13 Jul 2018, ufo19890607@...il.com wrote:

> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index 531b2c86d4db..7fbd389ea779 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -434,10 +434,11 @@ static void dump_header(struct oom_control *oc, struct task_struct *p)
>  			oom_constraint_text[oc->constraint],
>  			nodemask_pr_args(oc->nodemask));
>  	cpuset_print_current_mems_allowed();
> +	mem_cgroup_print_oom_context(oc->memcg, p);
>  	pr_cont(",task=%s,pid=%5d,uid=%5d\n", p->comm, p->pid,
>  		from_kuid(&init_user_ns, task_uid(p)));
>  	if (is_memcg_oom(oc))
> -		mem_cgroup_print_oom_info(oc->memcg, p);
> +		mem_cgroup_print_oom_meminfo(oc->memcg);
>  	else {
>  		show_mem(SHOW_MEM_FILTER_NODES, oc->nodemask);
>  		if (is_dump_unreclaim_slabs())

Ugh, could we please not pad the pid and uid with spaces?  I don't think 
it achieves anything and just makes regex less robust.

Otherwise, looks good!