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From: KOSAKI Motohiro <>
To: Andi Kleen <>
	Andrew Morton <>,,,,,,,,,,,
Subject: Re: [PATCH 4/8][for -mm] mem_notify v6: memory_pressure_notify() caller
Date: Thu, 14 Feb 2008 09:25:26 +0900	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi Andi,

> > to be honest, I don't think at mem-cgroup until now.
> There is not only mem-cgroup BTW, but also NUMA node restrictons from
> NUMA memory policy. So this means a process might not be able to access
> all memory.

you are right.
good point out.

current implementation may cause wake up the no relate process of
memory shortage zone ;-)

but unfortunately, we can't know per zone rss.
(/proc/[pid]/numa_maps is very slow, we can't use it
 at memory shortage emergency)

I think we need develop per zone rss.
it become not only improve mem_notify, but also improve
oom killer of more intelligent process choice.

but it is a bit difficult. (at least for me ;-)
may be, I will implement it a bit later...

Thanks again!
your good opnion may improve my patch.

- kosaki

      reply	other threads:[~2008-02-14  0:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-09 15:24 KOSAKI Motohiro
2008-02-12 22:56 ` Andrew Morton
2008-02-13  6:37   ` KOSAKI Motohiro
2008-02-13 15:03     ` Andi Kleen
2008-02-14  0:25       ` KOSAKI Motohiro [this message]

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