From: Gregory Price <gourry@gourry.net>
To: Chris Li <chrisl@kernel.org>
Cc: "Johannes Weiner" <hannes@cmpxchg.org>,
"Baoquan He" <baoquan.he@linux.dev>,
"Nhat Pham" <nphamcs@gmail.com>,
"Kairui Song" <kasong@tencent.com>,
"Michal Hocko" <mhocko@kernel.org>,
"Roman Gushchin" <roman.gushchin@linux.dev>,
"Shakeel Butt" <shakeel.butt@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>,
"Rik van Riel" <riel@surriel.com>,
"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>,
"Kairui Song" <ryncsn@gmail.com>,
"Joshua Hahn" <joshua.hahnjy@gmail.com>
Subject: Re: Path forward for Virtualized Swap?
Date: Mon, 21 Sep 2026 08:53:02 -0400 [thread overview]
Message-ID: <arEVDBlfsUYKK004@gourry-fedora-PF4VCD3F> (raw)
In-Reply-To: <CACePvbXudjxQ5vrrY4D1nOXKaFNQUn-tL+p3O0zfxtHXK99ojQ@mail.gmail.com>
On Sun, Sep 20, 2026 at 11:43:59PM -1000, Chris Li wrote:
> On Sat, Sep 19, 2026 at 3:53 PM Gregory Price <gourry@gourry.net> wrote:
>
> Let's start with the real question: on your fleet what is the max % of
> zswap memory compared to total RAM?
>
You're asking me to predict the future. Any number I give you today
will be wrong 3 seconds from now.
You can't know the compressibility of memory until after you compress
it, and requiring a user to predict the future by forcing them to limit
the total amount of workload compressibility does not scale with the
number of workloads of variable compressibility of data.
That should tell you that your model of reasoning about this issue is
ill-suited to address the problem.
~Gregory
next prev parent reply other threads:[~2026-09-21 12:53 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-04 21:14 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
2026-09-10 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
2026-09-19 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 [this message]
2026-09-21 16:11 ` Chris Li
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
2026-09-21 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
2026-09-21 18:11 ` Nhat Pham
2026-09-10 17:16 ` Nhat Pham
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