linux-kernel - Re: [RFC][PATCH] prevent incorrect oom under split

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Message-ID: <28c262360806250037k9fcde73g9b28c26eb8523f04@mail.gmail.com>
Date:	Wed, 25 Jun 2008 16:37:29 +0900
From:	"MinChan Kim" <minchan.kim@...il.com>
To:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
Cc:	"Rik van Riel" <riel@...hat.com>, linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Lee Schermerhorn" <Lee.Schermerhorn@...com>,
	akpm@...ux-foundation.org,
	"Takenori Nagano" <t-nagano@...jp.nec.com>
Subject: Re: [RFC][PATCH] prevent incorrect oom under split_lru

On Wed, Jun 25, 2008 at 4:29 PM, KOSAKI Motohiro
<kosaki.motohiro@...fujitsu.com> wrote:
>> > But if such emergency happen in embedded system, application can't be
>> > executed for some time.
>> > I am not sure how long time it take.
>> > But In some application, schedule period is very important than memory
>> > reclaim latency.
>> >
>> > Now, In your patch, when such emergency happen, it continue to reclaim
>> > page until it will scan entire page of lru list.
>> > It
>>
>> with my mistake, I omit following message. :(
>>
>> So, we need cut-off mechanism to reduce application latency.
>> So In my opinion, If we modify some code of Takenori's patch, we can
>> apply his idea to prevent latency probelm.
>
> Yup.
> Agreed with latency is as important as throughput.
>
> if anyone explain that patch have reduce some latency and
> no throughput degression by benchmark result,
> I have no objection, Of cource.
>
> Can you post any performance result?
>
>

hm.. I am not sure when I can post result of benchmark.

Of course, If I do, I will post it :)

Thanks, Kosaki-san

-- 
Kinds regards,
MinChan Kim
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