linux-kernel - Re: [PATCH v2] oom-kill: add lowmem usage aware oom kill handling

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Date:	Sat, 23 Jan 2010 00:16:40 +0900 (JST)
From:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
To:	"Minchan Kim" <minchan.kim@...il.com>
Cc:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	rientjes@...gle.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2] oom-kill: add lowmem usage aware oom kill handling

Minchan Kim wrote:
> On Fri, 2010-01-22 at 15:23 +0900, KAMEZAWA Hiroyuki wrote:
>> updated. thank you for review.

>>  	CONSTRAINT_MEMORY_POLICY,
>>  };
>
> <snip>
>> @@ -475,7 +511,7 @@ void mem_cgroup_out_of_memory(struct mem
>>
>>  	read_lock(&tasklist_lock);
>>  retry:
>> -	p = select_bad_process(&points, mem);
>> +	p = select_bad_process(&points, mem, CONSTRAINT_NONE);
>
> Why do you fix this with only CONSTRAINT_NONE?
> I think we can know CONSTRAINT_LOWMEM with gfp_mask in here.
>
memcg is just for accounting anon/file pages. Then, it's never
cause lowmem oom problem (any memory is ok for memcg).



> Any problem?
>
> Otherwise, Looks good to me. :)
>
> Reviewed-by: Minchan Kim <minchan.kim@...il.com>
>
Thank you.

-Kame

> --
> Kind regards,
> Minchan Kim
>
>


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