From: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
To: Michal Hocko <mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Shakeel Butt <shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Jakub Kicinski <kuba-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Linux MM <linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
Kernel Team <kernel-team-b10kYP2dOMg@public.gmane.org>,
Chris Down <chris-6Bi1550iOqEnzZ6mRAm98g@public.gmane.org>,
Cgroups <cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 0/3] memcg: Slow down swap allocation as the available space gets depleted
Date: Wed, 22 Apr 2020 10:15:14 -0400 [thread overview]
Message-ID: <20200422141514.GA362484@cmpxchg.org> (raw)
In-Reply-To: <20200422132632.GG30312-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
On Wed, Apr 22, 2020 at 03:26:32PM +0200, Michal Hocko wrote:
> That being said I believe our discussion is missing an important part.
> There is no description of the swap.high semantic. What can user expect
> when using it?
Good point, we should include that in cgroup-v2.rst. How about this?
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index bcc80269bb6a..49e8733a9d8a 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1370,6 +1370,17 @@ PAGE_SIZE multiple when read back.
The total amount of swap currently being used by the cgroup
and its descendants.
+ memory.swap.high
+ A read-write single value file which exists on non-root
+ cgroups. The default is "max".
+
+ Swap usage throttle limit. If a cgroup's swap usage exceeds
+ this limit, allocations inside the cgroup will be throttled.
+
+ This slows down expansion of the group's memory footprint as
+ it runs out of assigned swap space. Compare to memory.swap.max,
+ which stops swapping abruptly and can provoke kernel OOM kills.
+
memory.swap.max
A read-write single value file which exists on non-root
cgroups. The default is "max".
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>, Shakeel Butt <shakeelb@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux MM <linux-mm@kvack.org>, Kernel Team <kernel-team@fb.com>,
Chris Down <chris@chrisdown.name>,
Cgroups <cgroups@vger.kernel.org>
Subject: Re: [PATCH 0/3] memcg: Slow down swap allocation as the available space gets depleted
Date: Wed, 22 Apr 2020 10:15:14 -0400 [thread overview]
Message-ID: <20200422141514.GA362484@cmpxchg.org> (raw)
In-Reply-To: <20200422132632.GG30312@dhcp22.suse.cz>
On Wed, Apr 22, 2020 at 03:26:32PM +0200, Michal Hocko wrote:
> That being said I believe our discussion is missing an important part.
> There is no description of the swap.high semantic. What can user expect
> when using it?
Good point, we should include that in cgroup-v2.rst. How about this?
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index bcc80269bb6a..49e8733a9d8a 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1370,6 +1370,17 @@ PAGE_SIZE multiple when read back.
The total amount of swap currently being used by the cgroup
and its descendants.
+ memory.swap.high
+ A read-write single value file which exists on non-root
+ cgroups. The default is "max".
+
+ Swap usage throttle limit. If a cgroup's swap usage exceeds
+ this limit, allocations inside the cgroup will be throttled.
+
+ This slows down expansion of the group's memory footprint as
+ it runs out of assigned swap space. Compare to memory.swap.max,
+ which stops swapping abruptly and can provoke kernel OOM kills.
+
memory.swap.max
A read-write single value file which exists on non-root
cgroups. The default is "max".
next prev parent reply other threads:[~2020-04-22 14:15 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-17 1:06 [PATCH 0/3] memcg: Slow down swap allocation as the available space gets depleted Jakub Kicinski
2020-04-17 1:06 ` Jakub Kicinski
[not found] ` <20200417010617.927266-1-kuba-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2020-04-17 1:06 ` [PATCH 1/3] mm: prepare for swap over-high accounting and penalty calculation Jakub Kicinski
2020-04-17 1:06 ` Jakub Kicinski
2020-04-17 1:06 ` [PATCH 2/3] mm: move penalty delay clamping out of calculate_high_delay() Jakub Kicinski
2020-04-17 1:06 ` Jakub Kicinski
2020-04-17 1:06 ` [PATCH 3/3] mm: automatically penalize tasks with high swap use Jakub Kicinski
2020-04-17 1:06 ` Jakub Kicinski
[not found] ` <20200417010617.927266-4-kuba-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2020-04-17 7:37 ` Michal Hocko
2020-04-17 7:37 ` Michal Hocko
[not found] ` <20200417073716.GG26707-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-17 23:22 ` Jakub Kicinski
2020-04-17 23:22 ` Jakub Kicinski
2020-04-17 16:11 ` [PATCH 0/3] memcg: Slow down swap allocation as the available space gets depleted Shakeel Butt
2020-04-17 16:11 ` Shakeel Butt
[not found] ` <CALvZod78ZUhU+yr2x1h_gv+VgVGTPnSSGKh_+fd+MeiAKreJvg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-04-17 16:23 ` Tejun Heo
2020-04-17 16:23 ` Tejun Heo
[not found] ` <20200417162355.GA43469-146+VewaZzwNjtGbbfXrCEEOCMrvLtNR@public.gmane.org>
2020-04-17 17:18 ` Shakeel Butt
2020-04-17 17:18 ` Shakeel Butt
[not found] ` <CALvZod4ftvXCu8SbQUXwTGVvx5K2+at9h30r28chZLXEB1JdfQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-04-17 17:36 ` Tejun Heo
2020-04-17 17:36 ` Tejun Heo
[not found] ` <20200417173615.GB43469-146+VewaZzwNjtGbbfXrCEEOCMrvLtNR@public.gmane.org>
2020-04-17 17:51 ` Shakeel Butt
2020-04-17 17:51 ` Shakeel Butt
2020-04-17 19:35 ` Tejun Heo
2020-04-17 19:35 ` Tejun Heo
[not found] ` <20200417193539.GC43469-146+VewaZzwNjtGbbfXrCEEOCMrvLtNR@public.gmane.org>
2020-04-17 21:51 ` Shakeel Butt
2020-04-17 21:51 ` Shakeel Butt
[not found] ` <CALvZod6LT25t9aAA1KHmf1U4-L8zSjUXQ4VQvX4cMT1A+R_g+w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-04-17 22:59 ` Tejun Heo
2020-04-17 22:59 ` Tejun Heo
[not found] ` <20200417225941.GE43469-146+VewaZzwNjtGbbfXrCEEOCMrvLtNR@public.gmane.org>
2020-04-20 16:12 ` Shakeel Butt
2020-04-20 16:12 ` Shakeel Butt
[not found] ` <CALvZod6M4OsM-t8m_KX9wCkEutdwUMgbP9682eHGQor9JvO_BQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-04-20 16:47 ` Tejun Heo
2020-04-20 16:47 ` Tejun Heo
[not found] ` <20200420164740.GF43469-146+VewaZzwNjtGbbfXrCEEOCMrvLtNR@public.gmane.org>
2020-04-20 17:03 ` Michal Hocko
2020-04-20 17:03 ` Michal Hocko
[not found] ` <20200420170318.GV27314-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-20 17:06 ` Tejun Heo
2020-04-20 17:06 ` Tejun Heo
[not found] ` <20200420170650.GA169746-146+VewaZzwNjtGbbfXrCEEOCMrvLtNR@public.gmane.org>
2020-04-21 11:06 ` Michal Hocko
2020-04-21 11:06 ` Michal Hocko
[not found] ` <20200421110612.GD27314-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-21 14:27 ` Johannes Weiner
2020-04-21 14:27 ` Johannes Weiner
[not found] ` <20200421142746.GA341682-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2020-04-21 16:11 ` Michal Hocko
2020-04-21 16:11 ` Michal Hocko
[not found] ` <20200421161138.GL27314-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-21 16:56 ` Johannes Weiner
2020-04-21 16:56 ` Johannes Weiner
[not found] ` <20200421165601.GA345998-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2020-04-22 13:26 ` Michal Hocko
2020-04-22 13:26 ` Michal Hocko
[not found] ` <20200422132632.GG30312-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-22 14:15 ` Johannes Weiner [this message]
2020-04-22 14:15 ` Johannes Weiner
[not found] ` <20200422141514.GA362484-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2020-04-22 15:43 ` Michal Hocko
2020-04-22 15:43 ` Michal Hocko
[not found] ` <20200422154318.GK30312-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-22 17:13 ` Johannes Weiner
2020-04-22 17:13 ` Johannes Weiner
[not found] ` <20200422171328.GC362484-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2020-04-22 18:49 ` Michal Hocko
2020-04-22 18:49 ` Michal Hocko
[not found] ` <20200422184921.GB4206-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-23 15:00 ` Johannes Weiner
2020-04-23 15:00 ` Johannes Weiner
[not found] ` <20200423150015.GE362484-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2020-04-24 15:05 ` Michal Hocko
2020-04-24 15:05 ` Michal Hocko
[not found] ` <20200424150510.GH11591-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2020-04-28 14:24 ` Johannes Weiner
2020-04-28 14:24 ` Johannes Weiner
[not found] ` <20200428142432.GA78561-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2020-04-29 9:55 ` Michal Hocko
2020-04-29 9:55 ` Michal Hocko
2020-04-21 19:09 ` Shakeel Butt
2020-04-21 19:09 ` Shakeel Butt
[not found] ` <CALvZod650M1_46R4OiS1mug+LKbjD=1s_xqckh9T6V8fPjct2g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-04-21 21:59 ` Johannes Weiner
2020-04-21 21:59 ` Johannes Weiner
[not found] ` <20200421215946.GA347151-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2020-04-21 22:39 ` Shakeel Butt
2020-04-21 22:39 ` Shakeel Butt
2020-04-21 15:20 ` Tejun Heo
2020-04-21 15:20 ` Tejun Heo
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