From: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: linux-mm <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Subject: Re: [PATCH(v2) -mmotm 2/2] memcg move charge of shmem at task migration
Date: Tue, 30 Mar 2010 13:06:48 +0900 [thread overview]
Message-ID: <20100330130648.ad559645.nishimura@mxp.nes.nec.co.jp> (raw)
In-Reply-To: <20100330121119.fcc7d45b.kamezawa.hiroyu@jp.fujitsu.com>
On Tue, 30 Mar 2010 12:11:19 +0900, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> On Tue, 30 Mar 2010 11:49:03 +0900
> Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> wrote:
>
> > On Tue, 30 Mar 2010 11:23:01 +0900, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > > SHARED mapped file cache is not moved by patch [1/2] ???
> > > It sounds strange.
> > >
> > hmm, I'm sorry I'm not so good at user applications, but is it usual to use
> > VM_SHARED file caches(!tmpfs) ?
> > And is it better for us to move them only when page_mapcount() == 1 ?
> >
>
> Considering shared library which has only one user, moving MAP_SHARED makes sense.
> Unfortunately, there are people who creates their own shared library just for
> their private dlopen() etc. (shared library for private use...)
>
> So, I think moving MAP_SHARED files makes sense.
>
Thank you for your explanations.
I'll update my patches to allow to move MAP_SHARED(but page_mapcount() == 1)
file caches, and resend.
Thanks,
Daisuke Nishimura.
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next prev parent reply other threads:[~2010-03-30 4:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-29 3:02 [PATCH -mmotm 0/2] memcg: move charge of file cache/shmem Daisuke Nishimura
2010-03-29 3:03 ` [PATCH -mmotm 1/2] memcg move charge of file cache at task migration Daisuke Nishimura
2010-03-29 4:15 ` KAMEZAWA Hiroyuki
2010-03-30 1:32 ` [PATCH(v2) " Daisuke Nishimura
2010-03-30 1:50 ` KAMEZAWA Hiroyuki
2010-03-30 5:46 ` Balbir Singh
2010-03-29 3:03 ` [PATCH -mmotm 2/2] memcg move charge of shmem " Daisuke Nishimura
2010-03-29 4:36 ` KAMEZAWA Hiroyuki
2010-03-30 1:33 ` [PATCH(v2) " Daisuke Nishimura
2010-03-30 1:58 ` KAMEZAWA Hiroyuki
2010-03-30 2:23 ` KAMEZAWA Hiroyuki
2010-03-30 2:49 ` Daisuke Nishimura
2010-03-30 3:11 ` KAMEZAWA Hiroyuki
2010-03-30 4:06 ` Daisuke Nishimura [this message]
2010-03-30 4:51 ` KAMEZAWA Hiroyuki
2010-03-30 5:00 ` Balbir Singh
2010-03-30 5:09 ` KAMEZAWA Hiroyuki
2010-03-30 5:30 ` Daisuke Nishimura
2010-03-30 5:44 ` KAMEZAWA Hiroyuki
2010-03-30 6:29 ` KAMEZAWA Hiroyuki
2010-03-31 0:34 ` Daisuke Nishimura
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