From: Rik van Riel <riel@surriel.com>
To: Chris Li <chrisl@kernel.org>
Cc: "Johannes Weiner" <hannes@cmpxchg.org>,
"Kairui Song" <ryncsn@gmail.com>, "Nhat Pham" <nphamcs@gmail.com>,
"Baoquan He" <baoquan.he@linux.dev>,
"Shakeel Butt" <shakeel.butt@linux.dev>,
"Kairui Song" <kasong@tencent.com>,
"Michal Hocko" <mhocko@kernel.org>,
"Roman Gushchin" <roman.gushchin@linux.dev>,
"Yosry Ahmed" <yosry@kernel.org>,
"David Hildenbrand" <david@kernel.org>,
"Muchun Song" <muchun.song@linux.dev>,
"Kemeng Shi" <shikemeng@huaweicloud.com>,
"Barry Song" <baohua@kernel.org>,
"YoungJun Park" <youngjun.park@lge.com>,
"Chengming Zhou" <chengming.zhou@linux.dev>,
"Lorenzo Stoakes (Oracle)" <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
"Vlastimil Babka (SUSE)" <vbabka@kernel.org>,
"Mike Rapoport" <rppt@kernel.org>,
"Suren Baghdasaryan" <surenb@google.com>,
"Qi Zheng" <qi.zheng@linux.dev>,
"Axel Rasmussen" <axelrasmussen@google.com>,
"Yuanchu Xie" <yuanchu@google.com>, "Wei Xu" <weixugc@google.com>,
"Gregory Price" <gourry@gourry.net>,
"Wenchao Hao" <haowenchao22@gmail.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Hugh Dickins" <hughd@google.com>,
"Baolin Wang" <baolin.wang@linux.alibaba.com>,
"Tejun Heo" <tj@kernel.org>, "Michal Koutný" <mkoutny@suse.com>,
"Shuah Khan" <skhan@linuxfoundation.org>,
"Kunwu Chan" <kunwu.chan@linux.dev>,
"Meta kernel team" <kernel-team@meta.com>,
"Linux Memory Management List" <linux-mm@kvack.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
linux-doc@vger.kernel.org,
"open list:CONTROL GROUP - MEMORY RESOURCE CONTROLLER (MEMCG)"
<cgroups@vger.kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Joshua Hahn" <joshua.hahnjy@gmail.com>
Subject: Re: Path forward for Virtualized Swap?
Date: Sun, 27 Sep 2026 08:29:21 -0400 [thread overview]
Message-ID: <b792823cce613ce756227a3b60cc245b0316a800.camel@surriel.com> (raw)
In-Reply-To: <CACePvbWdJSUDuEbR2FXczbeWwvxP86WDGHTL-eO0A8WwMDoNRQ@mail.gmail.com>
On Sat, 2026-09-26 at 20:23 -1000, Chris Li wrote:
> On Sat, Sep 26, 2026 at 2:59 PM Rik van Riel <riel@surriel.com>
> wrote:
>
>
> > The fair resource use from memory.swap.max
> > is to control how much of the fixed swap file
> > (or swap partition) space each cgroup gets.
>
> That is the part I am not sure I understand correctly. Fair in what
> sense? Using the swap file proportional to the memory limit of the
> cgroup? Do you have an example of perfectly fair swap file usage for
> a
> cgroup with an 8G memory limit versus one with a 1G limit?
>
> Sorry I am a bit slow grasping what exactly the fair behavior is.
Say we have a 64GB swap file, and several
cgroups on the system, applications A & B,
and system.slice.
We might give system.slice a 10GB memory.swap.max,
and each application a 25GB memory.swap.max.
This way a memory leak in application B
does not result in application A being
unable to run.
The thing that leaks (if anything) ends up
getting killed, not the innocent bystander.
--
All Rights Reversed.
next prev parent reply other threads:[~2026-09-27 12:30 UTC|newest]
Thread overview: 141+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-04 21:14 Path forward for Virtualized Swap? Nhat Pham
2026-09-07 5:51 ` Kairui Song
2026-09-08 16:36 ` Nhat Pham
2026-09-11 16:09 ` Kairui Song
2026-09-11 16:57 ` Nhat Pham
2026-09-11 18:14 ` Kairui Song
2026-09-11 19:03 ` Nhat Pham
2026-09-12 8:47 ` Kairui Song
2026-09-14 16:49 ` Nhat Pham
2026-09-08 18:30 ` Johannes Weiner
2026-09-09 16:41 ` Nhat Pham
2026-09-09 17:47 ` Nhat Pham
2026-09-12 9:00 ` Kairui Song
2026-09-12 11:51 ` Johannes Weiner
2026-09-19 7:23 ` Chris Li
2026-09-20 1:06 ` Rik van Riel
2026-09-21 0:18 ` Chris Li
2026-09-21 0:35 ` Rik van Riel
2026-09-21 0:53 ` Chris Li
2026-09-14 16:10 ` Nhat Pham
2026-09-10 23:27 ` Nhat Pham
2026-09-07 11:30 ` David Hildenbrand (Arm)
2026-09-08 16:45 ` Nhat Pham
2026-09-10 10:56 ` David Hildenbrand (Arm)
2026-09-10 16:22 ` Nhat Pham
2026-09-10 17:57 ` David Hildenbrand (Arm)
2026-09-11 16:20 ` Kairui Song
2026-09-11 16:56 ` David Hildenbrand (Arm)
2026-09-14 15:00 ` Baoquan He
2026-09-19 6:50 ` Chris Li
2026-09-21 18:55 ` Nhat Pham
2026-09-22 13:38 ` Chris Li
2026-09-22 14:43 ` Shakeel Butt
2026-09-22 14:56 ` Chris Li
2026-09-22 15:07 ` Johannes Weiner
2026-09-22 15:30 ` Chris Li
2026-09-22 15:45 ` Shakeel Butt
2026-09-23 6:44 ` Chris Li
2026-09-22 15:46 ` Johannes Weiner
2026-09-22 15:28 ` Baoquan He
2026-09-25 18:47 ` Shakeel Butt
2026-10-05 11:06 ` David Hildenbrand (Arm)
2026-10-07 16:47 ` Nhat Pham
2026-10-07 16:54 ` Yosry Ahmed
2026-09-10 7:09 ` Baoquan He
2026-09-10 16:39 ` Shakeel Butt
2026-09-11 13:06 ` Baoquan He
2026-09-11 16:45 ` Shakeel Butt
2026-09-15 5:48 ` Baoquan He
2026-09-15 6:44 ` Baoquan He
2026-09-19 6:55 ` Chris Li
2026-09-19 16:15 ` Rik van Riel
2026-09-19 21:21 ` Chris Li
2026-09-19 22:50 ` Rik van Riel
2026-09-21 0:13 ` Chris Li
2026-09-22 17:54 ` Nhat Pham
2026-09-23 7:44 ` Chris Li
2026-09-23 16:30 ` Shakeel Butt
2026-09-24 11:27 ` Chris Li
2026-09-24 13:15 ` Shakeel Butt
2026-09-25 13:15 ` Kairui Song
2026-09-25 15:41 ` Johannes Weiner
2026-09-25 19:21 ` Kairui Song
2026-09-25 20:20 ` Johannes Weiner
2026-09-26 21:27 ` Chris Li
2026-09-27 0:58 ` Rik van Riel
2026-09-27 6:23 ` Chris Li
2026-09-27 12:29 ` Rik van Riel [this message]
2026-09-27 16:17 ` Chris Li
2026-09-27 18:12 ` Rik van Riel
2026-09-27 23:50 ` Chris Li
2026-09-25 16:11 ` Gregory Price
2026-09-25 20:44 ` Kairui Song
2026-09-25 21:30 ` Gregory Price
2026-09-25 21:53 ` Johannes Weiner
2026-09-25 16:54 ` Nhat Pham
2026-09-25 20:26 ` Kairui Song
2026-09-28 12:38 ` Nhat Pham
2026-09-25 19:36 ` Shakeel Butt
2026-09-25 20:20 ` Kairui Song
2026-09-19 7:07 ` Chris Li
2026-09-10 17:03 ` Johannes Weiner
2026-09-11 12:27 ` Baoquan He
2026-09-11 16:21 ` Johannes Weiner
2026-09-19 8:45 ` Chris Li
2026-09-19 16:08 ` Gregory Price
2026-09-19 19:02 ` Chris Li
2026-09-20 1:14 ` Rik van Riel
2026-09-20 1:53 ` Gregory Price
2026-09-21 9:43 ` Chris Li
2026-09-21 12:53 ` Gregory Price
2026-09-21 16:11 ` Chris Li
2026-09-22 17:14 ` Rik van Riel
2026-09-22 17:21 ` Nhat Pham
2026-09-23 7:20 ` Chris Li
2026-09-22 17:31 ` Johannes Weiner
2026-09-23 7:32 ` Chris Li
2026-09-23 13:55 ` Johannes Weiner
2026-09-21 14:06 ` Rik van Riel
2026-09-21 16:15 ` Chris Li
2026-09-21 15:16 ` Rik van Riel
2026-09-21 16:31 ` Chris Li
2026-09-21 16:36 ` Rik van Riel
2026-09-21 18:10 ` Chris Li
2026-09-21 18:52 ` Rik van Riel
2026-09-22 13:32 ` Chris Li
2026-09-22 14:59 ` Rik van Riel
2026-09-22 15:23 ` Chris Li
2026-09-22 15:43 ` Johannes Weiner
2026-09-23 6:10 ` Chris Li
2026-09-22 15:48 ` Rik van Riel
2026-09-23 7:00 ` Chris Li
2026-09-23 14:21 ` Rik van Riel
2026-09-22 17:32 ` Nhat Pham
2026-09-23 7:37 ` Chris Li
2026-09-23 14:11 ` Johannes Weiner
2026-09-23 15:39 ` Nhat Pham
2026-09-22 15:20 ` Gregory Price
2026-09-22 15:43 ` Chris Li
2026-09-22 15:52 ` Rik van Riel
2026-09-23 7:10 ` Chris Li
2026-09-23 12:52 ` Klara Modin
2026-09-23 15:43 ` Nhat Pham
2026-09-23 17:26 ` Klara Modin
2026-09-24 5:51 ` Baoquan He
2026-09-24 7:20 ` Klara Modin
2026-09-24 7:53 ` Baoquan He
2026-09-21 10:01 ` Kairui Song
2026-09-21 13:27 ` Gregory Price
2026-09-21 15:27 ` Rik van Riel
2026-09-21 15:48 ` Gregory Price
2026-09-21 16:32 ` Chris Li
2026-09-21 17:02 ` Gregory Price
2026-09-23 9:39 ` Baoquan He
2026-09-23 12:11 ` Gregory Price
2026-09-24 11:02 ` Chris Li
2026-09-24 14:18 ` Gregory Price
2026-09-23 14:34 ` Kairui Song
2026-09-21 18:11 ` Nhat Pham
2026-09-22 17:16 ` Johannes Weiner
2026-09-10 17:16 ` Nhat Pham
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