From: Glauber Costa <glommer@parallels.com>
To: Tejun Heo <tj@kernel.org>
Cc: Michal Hocko <mhocko@suse.cz>, <linux-kernel@vger.kernel.org>,
<cgroups@vger.kernel.org>, <kamezawa.hiroyu@jp.fujitsu.com>,
<devel@openvz.org>, <linux-mm@kvack.org>,
Suleiman Souhlal <suleiman@google.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Mel Gorman <mgorman@suse.de>,
David Rientjes <rientjes@google.com>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH v3 04/13] kmem accounting basic infrastructure
Date: Wed, 26 Sep 2012 22:56:09 +0400 [thread overview]
Message-ID: <50634FC9.4090609@parallels.com> (raw)
In-Reply-To: <20120926180124.GA12544@google.com>
On 09/26/2012 10:01 PM, Tejun Heo wrote:
> Hello,
>
> On Wed, Sep 26, 2012 at 09:53:09PM +0400, Glauber Costa wrote:
>> I understand your trauma about over flexibility, and you know I share of
>> it. But I don't think there is any need to cap it here. Given kmem
>> accounted is perfectly hierarchical, and there seem to be plenty of
>> people who only care about user memory, I see no reason to disallow a
>> mixed use case here.
>>
>> I must say that for my particular use case, enabling it unconditionally
>> would just work, so it is not that what I have in mind.
>
> So, I'm not gonna go as far as pushing for enabling it unconditionally
> but would really like to hear why it's necessary to make it per node
> instead of one global switch. Maybe it has already been discussed to
> hell and back. Care to summarize / point me to it?
>
For me, it is the other way around: it makes perfect sense to have a
per-subtree selection of features where it doesn't hurt us, provided it
is hierarchical. For the mere fact that not every application is
interested in this (Michal is the one that is being so far more vocal
about this not being needed in some use cases), and it is perfectly
valid to imagine such applications would coexist.
So given the flexibility it brings, the real question is, as I said,
backwards: what is it necessary to make it a global switch ?
WARNING: multiple messages have this Message-ID (diff)
From: Glauber Costa <glommer@parallels.com>
To: Tejun Heo <tj@kernel.org>
Cc: Michal Hocko <mhocko@suse.cz>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
kamezawa.hiroyu@jp.fujitsu.com, devel@openvz.org,
linux-mm@kvack.org, Suleiman Souhlal <suleiman@google.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Mel Gorman <mgorman@suse.de>,
David Rientjes <rientjes@google.com>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH v3 04/13] kmem accounting basic infrastructure
Date: Wed, 26 Sep 2012 22:56:09 +0400 [thread overview]
Message-ID: <50634FC9.4090609@parallels.com> (raw)
In-Reply-To: <20120926180124.GA12544@google.com>
On 09/26/2012 10:01 PM, Tejun Heo wrote:
> Hello,
>
> On Wed, Sep 26, 2012 at 09:53:09PM +0400, Glauber Costa wrote:
>> I understand your trauma about over flexibility, and you know I share of
>> it. But I don't think there is any need to cap it here. Given kmem
>> accounted is perfectly hierarchical, and there seem to be plenty of
>> people who only care about user memory, I see no reason to disallow a
>> mixed use case here.
>>
>> I must say that for my particular use case, enabling it unconditionally
>> would just work, so it is not that what I have in mind.
>
> So, I'm not gonna go as far as pushing for enabling it unconditionally
> but would really like to hear why it's necessary to make it per node
> instead of one global switch. Maybe it has already been discussed to
> hell and back. Care to summarize / point me to it?
>
For me, it is the other way around: it makes perfect sense to have a
per-subtree selection of features where it doesn't hurt us, provided it
is hierarchical. For the mere fact that not every application is
interested in this (Michal is the one that is being so far more vocal
about this not being needed in some use cases), and it is perfectly
valid to imagine such applications would coexist.
So given the flexibility it brings, the real question is, as I said,
backwards: what is it necessary to make it a global switch ?
--
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WARNING: multiple messages have this Message-ID (diff)
From: Glauber Costa <glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org,
devel-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
Suleiman Souhlal
<suleiman-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Frederic Weisbecker
<fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Mel Gorman <mgorman-l3A5Bk7waGM@public.gmane.org>,
David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
Subject: Re: [PATCH v3 04/13] kmem accounting basic infrastructure
Date: Wed, 26 Sep 2012 22:56:09 +0400 [thread overview]
Message-ID: <50634FC9.4090609@parallels.com> (raw)
In-Reply-To: <20120926180124.GA12544-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
On 09/26/2012 10:01 PM, Tejun Heo wrote:
> Hello,
>
> On Wed, Sep 26, 2012 at 09:53:09PM +0400, Glauber Costa wrote:
>> I understand your trauma about over flexibility, and you know I share of
>> it. But I don't think there is any need to cap it here. Given kmem
>> accounted is perfectly hierarchical, and there seem to be plenty of
>> people who only care about user memory, I see no reason to disallow a
>> mixed use case here.
>>
>> I must say that for my particular use case, enabling it unconditionally
>> would just work, so it is not that what I have in mind.
>
> So, I'm not gonna go as far as pushing for enabling it unconditionally
> but would really like to hear why it's necessary to make it per node
> instead of one global switch. Maybe it has already been discussed to
> hell and back. Care to summarize / point me to it?
>
For me, it is the other way around: it makes perfect sense to have a
per-subtree selection of features where it doesn't hurt us, provided it
is hierarchical. For the mere fact that not every application is
interested in this (Michal is the one that is being so far more vocal
about this not being needed in some use cases), and it is perfectly
valid to imagine such applications would coexist.
So given the flexibility it brings, the real question is, as I said,
backwards: what is it necessary to make it a global switch ?
next prev parent reply other threads:[~2012-09-26 18:59 UTC|newest]
Thread overview: 323+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-18 14:03 [PATCH v3 00/13] kmem controller for memcg Glauber Costa
2012-09-18 14:03 ` Glauber Costa
2012-09-18 14:03 ` Glauber Costa
2012-09-18 14:03 ` [PATCH v3 01/13] memcg: Make it possible to use the stock for more than one page Glauber Costa
2012-09-18 14:03 ` Glauber Costa
2012-09-18 14:03 ` Glauber Costa
2012-10-01 18:48 ` Johannes Weiner
2012-10-01 18:48 ` Johannes Weiner
2012-09-18 14:03 ` [PATCH v3 02/13] memcg: Reclaim when more than one page needed Glauber Costa
2012-09-18 14:03 ` Glauber Costa
2012-09-18 14:03 ` Glauber Costa
2012-10-01 19:00 ` Johannes Weiner
2012-10-01 19:00 ` Johannes Weiner
2012-09-18 14:04 ` [PATCH v3 03/13] memcg: change defines to an enum Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-10-01 19:06 ` Johannes Weiner
2012-10-01 19:06 ` Johannes Weiner
2012-10-01 19:06 ` Johannes Weiner
2012-10-02 9:10 ` Glauber Costa
2012-10-02 9:10 ` Glauber Costa
2012-09-18 14:04 ` [PATCH v3 04/13] kmem accounting basic infrastructure Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-21 16:34 ` Tejun Heo
2012-09-21 16:34 ` Tejun Heo
2012-09-24 8:09 ` Glauber Costa
2012-09-24 8:09 ` Glauber Costa
2012-09-24 8:09 ` Glauber Costa
2012-09-26 14:03 ` Michal Hocko
2012-09-26 14:03 ` Michal Hocko
2012-09-26 14:03 ` Michal Hocko
2012-09-26 14:33 ` Glauber Costa
2012-09-26 14:33 ` Glauber Costa
2012-09-26 16:01 ` Michal Hocko
2012-09-26 16:01 ` Michal Hocko
2012-09-26 16:01 ` Michal Hocko
2012-09-26 17:34 ` Glauber Costa
2012-09-26 17:34 ` Glauber Costa
2012-09-26 16:36 ` Tejun Heo
2012-09-26 16:36 ` Tejun Heo
2012-09-26 16:36 ` Tejun Heo
2012-09-26 17:36 ` Glauber Costa
2012-09-26 17:36 ` Glauber Costa
2012-09-26 17:44 ` Tejun Heo
2012-09-26 17:44 ` Tejun Heo
2012-09-26 17:44 ` Tejun Heo
2012-09-26 17:53 ` Glauber Costa
2012-09-26 17:53 ` Glauber Costa
2012-09-26 18:01 ` Tejun Heo
2012-09-26 18:01 ` Tejun Heo
2012-09-26 18:56 ` Glauber Costa [this message]
2012-09-26 18:56 ` Glauber Costa
2012-09-26 18:56 ` Glauber Costa
2012-09-26 19:34 ` Tejun Heo
2012-09-26 19:34 ` Tejun Heo
2012-09-26 19:34 ` Tejun Heo
2012-09-26 19:46 ` Glauber Costa
2012-09-26 19:46 ` Glauber Costa
2012-09-26 19:56 ` Tejun Heo
2012-09-26 19:56 ` Tejun Heo
2012-09-26 19:56 ` Tejun Heo
2012-09-26 20:02 ` Glauber Costa
2012-09-26 20:02 ` Glauber Costa
2012-09-26 20:16 ` Tejun Heo
2012-09-26 20:16 ` Tejun Heo
2012-09-26 20:16 ` Tejun Heo
2012-09-26 21:24 ` Glauber Costa
2012-09-26 21:24 ` Glauber Costa
2012-09-26 22:10 ` Tejun Heo
2012-09-26 22:10 ` Tejun Heo
2012-09-26 22:10 ` Tejun Heo
2012-09-26 22:29 ` Glauber Costa
2012-09-26 22:29 ` Glauber Costa
2012-09-26 22:42 ` Tejun Heo
2012-09-26 22:42 ` Tejun Heo
2012-09-26 22:42 ` Tejun Heo
2012-09-26 22:54 ` Glauber Costa
2012-09-26 22:54 ` Glauber Costa
2012-09-26 23:08 ` Tejun Heo
2012-09-26 23:08 ` Tejun Heo
2012-09-26 23:08 ` Tejun Heo
2012-09-26 23:20 ` Glauber Costa
2012-09-26 23:20 ` Glauber Costa
2012-09-26 23:33 ` Tejun Heo
2012-09-26 23:33 ` Tejun Heo
2012-09-27 12:15 ` Michal Hocko
2012-09-27 12:15 ` Michal Hocko
2012-09-27 12:15 ` Michal Hocko
2012-09-27 12:20 ` Glauber Costa
2012-09-27 12:20 ` Glauber Costa
2012-09-27 12:40 ` Michal Hocko
2012-09-27 12:40 ` Michal Hocko
2012-09-27 12:40 ` Michal Hocko
2012-09-27 12:40 ` Glauber Costa
2012-09-27 12:40 ` Glauber Costa
2012-09-27 12:40 ` Glauber Costa
2012-09-27 12:54 ` Michal Hocko
2012-09-27 12:54 ` Michal Hocko
2012-09-27 14:28 ` Mel Gorman
2012-09-27 14:28 ` Mel Gorman
2012-09-27 14:28 ` Mel Gorman
2012-09-27 14:49 ` Tejun Heo
2012-09-27 14:49 ` Tejun Heo
2012-09-27 14:57 ` Glauber Costa
2012-09-27 14:57 ` Glauber Costa
2012-09-27 17:46 ` Tejun Heo
2012-09-27 17:46 ` Tejun Heo
2012-09-27 17:46 ` Tejun Heo
2012-09-27 17:56 ` Michal Hocko
2012-09-27 17:56 ` Michal Hocko
2012-09-27 18:45 ` Glauber Costa
2012-09-27 18:45 ` Glauber Costa
2012-09-30 7:57 ` Tejun Heo
2012-09-30 7:57 ` Tejun Heo
2012-09-30 7:57 ` Tejun Heo
2012-09-30 8:02 ` Tejun Heo
2012-09-30 8:02 ` Tejun Heo
2012-09-30 8:56 ` James Bottomley
2012-09-30 8:56 ` James Bottomley
2012-09-30 8:56 ` James Bottomley
2012-09-30 10:37 ` Tejun Heo
2012-09-30 10:37 ` Tejun Heo
2012-09-30 10:37 ` Tejun Heo
2012-09-30 11:25 ` James Bottomley
2012-09-30 11:25 ` James Bottomley
2012-10-01 0:57 ` Tejun Heo
2012-10-01 0:57 ` Tejun Heo
2012-10-01 0:57 ` Tejun Heo
2012-10-01 8:43 ` Glauber Costa
2012-10-01 8:43 ` Glauber Costa
2012-10-01 8:46 ` Glauber Costa
2012-10-01 8:46 ` Glauber Costa
2012-10-03 22:59 ` Tejun Heo
2012-10-03 22:59 ` Tejun Heo
2012-10-01 8:36 ` Glauber Costa
2012-10-01 8:36 ` Glauber Costa
2012-09-27 12:08 ` Michal Hocko
2012-09-27 12:08 ` Michal Hocko
2012-09-27 12:08 ` Michal Hocko
2012-09-27 12:11 ` Glauber Costa
2012-09-27 12:11 ` Glauber Costa
2012-09-27 14:33 ` Tejun Heo
2012-09-27 14:33 ` Tejun Heo
2012-09-27 14:43 ` Mel Gorman
2012-09-27 14:43 ` Mel Gorman
2012-09-27 14:43 ` Mel Gorman
2012-09-27 14:58 ` Tejun Heo
2012-09-27 14:58 ` Tejun Heo
2012-09-27 18:30 ` Glauber Costa
2012-09-27 18:30 ` Glauber Costa
2012-09-30 8:23 ` Tejun Heo
2012-09-30 8:23 ` Tejun Heo
2012-10-01 8:45 ` Glauber Costa
2012-10-01 8:45 ` Glauber Costa
2012-10-03 22:54 ` Tejun Heo
2012-10-03 22:54 ` Tejun Heo
2012-10-04 11:55 ` Glauber Costa
2012-10-04 11:55 ` Glauber Costa
2012-10-06 2:19 ` Tejun Heo
2012-10-06 2:19 ` Tejun Heo
2012-10-06 2:19 ` Tejun Heo
2012-09-27 15:09 ` Michal Hocko
2012-09-27 15:09 ` Michal Hocko
2012-09-30 8:47 ` Tejun Heo
2012-09-30 8:47 ` Tejun Heo
2012-10-01 9:27 ` Michal Hocko
2012-10-01 9:27 ` Michal Hocko
2012-10-03 22:43 ` Tejun Heo
2012-10-03 22:43 ` Tejun Heo
2012-10-03 22:43 ` Tejun Heo
2012-10-05 13:47 ` Michal Hocko
2012-10-05 13:47 ` Michal Hocko
2012-10-05 13:47 ` Michal Hocko
2012-09-26 22:11 ` Johannes Weiner
2012-09-26 22:11 ` Johannes Weiner
2012-09-26 22:11 ` Johannes Weiner
2012-09-26 22:45 ` Glauber Costa
2012-09-26 22:45 ` Glauber Costa
2012-09-18 14:04 ` [PATCH v3 05/13] Add a __GFP_KMEMCG flag Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:15 ` Rik van Riel
2012-09-18 14:15 ` Rik van Riel
2012-09-18 15:06 ` Christoph Lameter
2012-09-18 15:06 ` Christoph Lameter
2012-09-18 15:06 ` Christoph Lameter
2012-09-19 7:39 ` Glauber Costa
2012-09-19 7:39 ` Glauber Costa
2012-09-19 7:39 ` Glauber Costa
2012-09-19 14:07 ` Christoph Lameter
2012-09-19 14:07 ` Christoph Lameter
2012-09-19 14:07 ` Christoph Lameter
2012-09-27 13:34 ` Mel Gorman
2012-09-27 13:34 ` Mel Gorman
2012-09-27 13:41 ` Glauber Costa
2012-09-27 13:41 ` Glauber Costa
2012-10-01 19:09 ` Johannes Weiner
2012-10-01 19:09 ` Johannes Weiner
2012-09-18 14:04 ` [PATCH v3 06/13] memcg: kmem controller infrastructure Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-20 16:05 ` JoonSoo Kim
2012-09-20 16:05 ` JoonSoo Kim
2012-09-20 16:05 ` JoonSoo Kim
2012-09-21 8:41 ` Glauber Costa
2012-09-21 8:41 ` Glauber Costa
2012-09-21 8:41 ` Glauber Costa
2012-09-21 9:14 ` JoonSoo Kim
2012-09-21 9:14 ` JoonSoo Kim
2012-09-26 15:51 ` Michal Hocko
2012-09-26 15:51 ` Michal Hocko
2012-09-26 15:51 ` Michal Hocko
2012-09-27 11:31 ` Glauber Costa
2012-09-27 11:31 ` Glauber Costa
2012-09-27 13:44 ` Michal Hocko
2012-09-27 13:44 ` Michal Hocko
2012-09-27 13:44 ` Michal Hocko
2012-09-28 11:34 ` Glauber Costa
2012-09-28 11:34 ` Glauber Costa
2012-09-28 11:34 ` Glauber Costa
2012-09-30 8:25 ` Tejun Heo
2012-09-30 8:25 ` Tejun Heo
2012-10-01 8:28 ` Glauber Costa
2012-10-01 8:28 ` Glauber Costa
2012-10-03 22:11 ` Tejun Heo
2012-10-03 22:11 ` Tejun Heo
2012-10-03 22:11 ` Tejun Heo
2012-10-01 9:44 ` Michal Hocko
2012-10-01 9:44 ` Michal Hocko
2012-10-01 9:44 ` Michal Hocko
2012-10-01 9:48 ` Michal Hocko
2012-10-01 9:48 ` Michal Hocko
2012-10-01 9:48 ` Michal Hocko
2012-10-01 10:09 ` Glauber Costa
2012-10-01 10:09 ` Glauber Costa
2012-10-01 11:51 ` Michal Hocko
2012-10-01 11:51 ` Michal Hocko
2012-10-01 11:51 ` Glauber Costa
2012-10-01 11:51 ` Glauber Costa
2012-10-01 11:51 ` Glauber Costa
2012-10-01 11:58 ` Michal Hocko
2012-10-01 11:58 ` Michal Hocko
2012-10-01 12:04 ` Glauber Costa
2012-10-01 12:04 ` Glauber Costa
2012-10-01 12:04 ` Glauber Costa
2012-09-18 14:04 ` [PATCH v3 07/13] mm: Allocate kernel pages to the right memcg Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-27 13:50 ` Mel Gorman
2012-09-27 13:50 ` Mel Gorman
2012-09-28 9:43 ` Glauber Costa
2012-09-28 9:43 ` Glauber Costa
2012-09-28 9:43 ` Glauber Costa
2012-09-28 13:28 ` Mel Gorman
2012-09-28 13:28 ` Mel Gorman
2012-09-27 13:52 ` Michal Hocko
2012-09-27 13:52 ` Michal Hocko
2012-09-27 13:52 ` Michal Hocko
2012-09-18 14:04 ` [PATCH v3 08/13] res_counter: return amount of charges after res_counter_uncharge Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-10-01 10:00 ` Michal Hocko
2012-10-01 10:00 ` Michal Hocko
2012-10-01 10:01 ` Glauber Costa
2012-10-01 10:01 ` Glauber Costa
2012-09-18 14:04 ` [PATCH v3 09/13] memcg: kmem accounting lifecycle management Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-10-01 12:15 ` Michal Hocko
2012-10-01 12:15 ` Michal Hocko
2012-10-01 12:15 ` Michal Hocko
2012-10-01 12:29 ` Glauber Costa
2012-10-01 12:29 ` Glauber Costa
2012-10-01 12:29 ` Glauber Costa
2012-10-01 12:36 ` Michal Hocko
2012-10-01 12:36 ` Michal Hocko
2012-10-01 12:36 ` Michal Hocko
2012-10-01 12:43 ` Glauber Costa
2012-10-01 12:43 ` Glauber Costa
2012-10-01 12:43 ` Glauber Costa
2012-09-18 14:04 ` [PATCH v3 10/13] memcg: use static branches when code not in use Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-10-01 12:25 ` Michal Hocko
2012-10-01 12:25 ` Michal Hocko
2012-10-01 12:27 ` Glauber Costa
2012-10-01 12:27 ` Glauber Costa
2012-10-01 12:27 ` Glauber Costa
2012-09-18 14:04 ` [PATCH v3 11/13] memcg: allow a memcg with kmem charges to be destructed Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-10-01 12:30 ` Michal Hocko
2012-10-01 12:30 ` Michal Hocko
2012-10-01 12:30 ` Michal Hocko
2012-09-18 14:04 ` [PATCH v3 12/13] execute the whole memcg freeing in rcu callback Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-21 17:23 ` Tejun Heo
2012-09-21 17:23 ` Tejun Heo
2012-09-21 17:23 ` Tejun Heo
2012-09-24 8:48 ` Glauber Costa
2012-09-24 8:48 ` Glauber Costa
2012-09-24 8:48 ` Glauber Costa
2012-10-01 13:27 ` Michal Hocko
2012-10-01 13:27 ` Michal Hocko
2012-10-01 13:27 ` Michal Hocko
2012-10-04 10:53 ` Glauber Costa
2012-10-04 10:53 ` Glauber Costa
2012-10-04 10:53 ` Glauber Costa
2012-10-04 14:20 ` Glauber Costa
2012-10-04 14:20 ` Glauber Costa
2012-10-05 15:31 ` Johannes Weiner
2012-10-05 15:31 ` Johannes Weiner
2012-10-05 15:31 ` Johannes Weiner
2012-10-08 9:45 ` Glauber Costa
2012-10-08 9:45 ` Glauber Costa
2012-09-18 14:04 ` [PATCH v3 13/13] protect architectures where THREAD_SIZE >= PAGE_SIZE against fork bombs Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-09-18 14:04 ` Glauber Costa
2012-10-01 13:17 ` Michal Hocko
2012-10-01 13:17 ` Michal Hocko
2012-10-01 13:17 ` Michal Hocko
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