From: Michal Hocko <mhocko@suse.cz>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
Suleiman Souhlal <suleiman@google.com>, Tejun Heo <tj@kernel.org>,
cgroups@vger.kernel.org, kamezawa.hiroyu@jp.fujitsu.com,
Johannes Weiner <hannes@cmpxchg.org>,
Greg Thelen <gthelen@google.com>,
devel@openvz.org, Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: [PATCH v4 14/14] Add documentation about the kmem controller
Date: Fri, 12 Oct 2012 10:44:32 +0200 [thread overview]
Message-ID: <20121012084431.GF10110@dhcp22.suse.cz> (raw)
In-Reply-To: <5077CC73.80504@parallels.com>
On Fri 12-10-12 11:53:23, Glauber Costa wrote:
> On 10/11/2012 06:35 PM, Michal Hocko wrote:
> > On Mon 08-10-12 14:06:20, Glauber Costa wrote:
[...]
> >> Kernel memory limits are not imposed for the root cgroup. Usage for the root
> >> -cgroup may or may not be accounted.
> >> +cgroup may or may not be accounted. The memory used is accumulated into
> >> +memory.kmem.usage_in_bytes, or in a separate counter when it makes sense.
> >
> > Which separate counter? Is this about tcp kmem?
> >
>
> So far, yes, this is the only case that makes sense, and the fewer the
> better. In any case it exists, and I wanted to be generic.
Add (currently tcp) or something similar
[...]
> >> + Kernel memory is effectively set as a percentage of the user memory. This
> >
> > not a percentage it is subset of the user memory
> >
> Well, this is semantics. I can change, but for me it makes a lot of
> sense to think of it in terms of a percentage, because it is easy to
> administer. You don't actually write a percentage, which I tried to
> clarify by using the term "effective set as a percentage".
I can still see somebody reading this and wondering why echo 50 > ...limit
didn't set a percentage...
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2012-10-12 8:44 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-08 10:06 [PATCH v4 00/14] kmem controller for memcg Glauber Costa
2012-10-08 10:06 ` [PATCH v4 01/14] memcg: Make it possible to use the stock for more than one page Glauber Costa
2012-10-08 10:06 ` [PATCH v4 02/14] memcg: Reclaim when more than one page needed Glauber Costa
2012-10-16 3:22 ` Kamezawa Hiroyuki
2012-10-08 10:06 ` [PATCH v4 03/14] memcg: change defines to an enum Glauber Costa
2012-10-08 10:06 ` [PATCH v4 04/14] kmem accounting basic infrastructure Glauber Costa
2012-10-11 10:11 ` Michal Hocko
2012-10-11 12:53 ` Michal Hocko
2012-10-11 13:38 ` Michal Hocko
2012-10-12 7:36 ` Glauber Costa
2012-10-12 8:27 ` Michal Hocko
2012-10-08 10:06 ` [PATCH v4 05/14] Add a __GFP_KMEMCG flag Glauber Costa
2012-10-09 15:04 ` Michal Hocko
2012-10-08 10:06 ` [PATCH v4 06/14] memcg: kmem controller infrastructure Glauber Costa
2012-10-11 12:42 ` Michal Hocko
2012-10-11 12:56 ` Michal Hocko
2012-10-12 7:45 ` Glauber Costa
2012-10-12 8:39 ` Michal Hocko
2012-10-12 8:44 ` Glauber Costa
2012-10-12 8:57 ` Michal Hocko
2012-10-12 9:13 ` Glauber Costa
2012-10-12 9:47 ` Michal Hocko
2012-10-16 8:00 ` Kamezawa Hiroyuki
2012-10-08 10:06 ` [PATCH v4 07/14] mm: Allocate kernel pages to the right memcg Glauber Costa
2012-10-08 10:06 ` [PATCH v4 08/14] res_counter: return amount of charges after res_counter_uncharge Glauber Costa
2012-10-09 15:08 ` Michal Hocko
2012-10-09 15:14 ` Glauber Costa
2012-10-09 15:35 ` Michal Hocko
2012-10-10 9:03 ` Glauber Costa
2012-10-10 11:24 ` Michal Hocko
2012-10-10 11:25 ` Michal Hocko
2012-10-16 8:20 ` Kamezawa Hiroyuki
2012-10-08 10:06 ` [PATCH v4 09/14] memcg: kmem accounting lifecycle management Glauber Costa
2012-10-11 13:11 ` Michal Hocko
2012-10-12 7:47 ` Glauber Costa
2012-10-12 8:41 ` Michal Hocko
2012-10-16 8:41 ` Kamezawa Hiroyuki
2012-10-08 10:06 ` [PATCH v4 10/14] memcg: use static branches when code not in use Glauber Costa
2012-10-11 13:40 ` Michal Hocko
2012-10-12 7:47 ` Glauber Costa
2012-10-16 8:48 ` Kamezawa Hiroyuki
2012-10-08 10:06 ` [PATCH v4 11/14] memcg: allow a memcg with kmem charges to be destructed Glauber Costa
2012-10-08 10:06 ` [PATCH v4 12/14] execute the whole memcg freeing in free_worker Glauber Costa
2012-10-11 14:21 ` Michal Hocko
2012-10-08 10:06 ` [PATCH v4 13/14] protect architectures where THREAD_SIZE >= PAGE_SIZE against fork bombs Glauber Costa
2012-10-08 10:06 ` [PATCH v4 14/14] Add documentation about the kmem controller Glauber Costa
2012-10-11 14:35 ` Michal Hocko
2012-10-12 7:53 ` Glauber Costa
2012-10-12 8:44 ` Michal Hocko [this message]
2012-10-17 7:29 ` Kamezawa Hiroyuki
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