From: Michal Hocko <mhocko@suse.cz>
To: Hugh Dickins <hughd@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Chiang <pchiang@nvidia.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Balbir Singh <bsingharora@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
"ccross@android.com" <ccross@android.com>,
"lizefan@huawei.com" <lizefan@huawei.com>,
"tj@kernel.org" <tj@kernel.org>, "pavel@ucw.cz" <pavel@ucw.cz>,
"ebiederm@xmission.com" <ebiederm@xmission.com>,
"guillaume@morinfr.org" <guillaume@morinfr.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads
Date: Wed, 23 Apr 2014 09:04:15 +0200 [thread overview]
Message-ID: <20140423070415.GA20969@dhcp22.suse.cz> (raw)
In-Reply-To: <alpine.LSU.2.11.1404221432150.6603@eggly.anvils>
On Tue 22-04-14 14:35:14, Hugh Dickins wrote:
> On Tue, 22 Apr 2014, Michal Hocko wrote:
> > On Tue 22-04-14 12:52:28, Michal Hocko wrote:
> > > On Fri 18-04-14 20:44:41, Oleg Nesterov wrote:
> > [...]
> > > > I do not even understand why do we have CONFIG_MM_OWNER, perhaps it should
> > > > die?
> > >
> > > I have to dig into history to check why it has been introduced in the
> > > first place. It might be possible it is not relevant anymore.
> >
> > There didn't seem to be any other user of CONFIG_MM_OWNER outside of
> > MEMCG so it seems that a separate config option seems like an overkill.
> > Regarding the mm->owner itself it is hard to live without it at the
> > moment. Most of the charging places do charge the current task_struct
> > but there are some that rely on mm and we would need mm->task mapping.
> > The last obstacle would be threads migration but that one should go away
> > with unified hierarchy AFAIR.
>
> Balbir had another user for mm->owner in mmotm back in 2008, his
> memrlimit controller; but that didn't make it through to mainline.
I see, thanks for the reference, Hugh!
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2014-04-23 7:04 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-16 3:02 [PATCH] mm : Avoid candidate task is equal to current task Peter Chiang
2014-04-16 12:31 ` Peter Chiang
2014-04-16 12:52 ` Peter Chiang
2014-04-16 13:57 ` Oleg Nesterov
2014-04-17 6:48 ` Peter Chiang
2014-04-18 16:23 ` Oleg Nesterov
2014-04-18 17:26 ` [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads Oleg Nesterov
2014-04-18 17:26 ` [PATCH 1/2] " Oleg Nesterov
2014-04-18 17:27 ` [PATCH 2/2] memcg: optimize the "Search everything else" loop in mm_update_next_owner() Oleg Nesterov
2014-04-18 18:24 ` [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads Michal Hocko
2014-04-18 18:44 ` Oleg Nesterov
2014-04-18 19:12 ` [PATCH 0/1] memcg: kill start_kernel()->mm_init_owner(init_mm) Oleg Nesterov
2014-04-18 19:13 ` [PATCH 1/1] " Oleg Nesterov
2014-04-22 13:34 ` Michal Hocko
2014-04-22 13:23 ` [PATCH 0/1] " Michal Hocko
2014-04-22 16:15 ` [PATCH 0/1] memcg: kill CONFIG_MM_OWNER Oleg Nesterov
2014-04-22 16:15 ` [PATCH 1/1] " Oleg Nesterov
2014-04-22 16:39 ` Johannes Weiner
2014-04-22 16:59 ` [PATCH 0/1] " Michal Hocko
2014-04-22 10:52 ` [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads Michal Hocko
2014-04-22 13:21 ` Michal Hocko
2014-04-22 21:35 ` Hugh Dickins
2014-04-23 7:04 ` Michal Hocko [this message]
2014-04-19 8:34 ` Pavel Machek
2014-04-19 18:14 ` Oleg Nesterov
2014-04-19 21:23 ` Hugh Dickins
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