From: Andrew Morton <akpm@linux-foundation.org>
To: Dan Schatzberg <schatzberg.dan@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Yosry Ahmed <yosryahmed@google.com>, Huan Yang <link@vivo.com>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
linux-mm@kvack.org, Michal Hocko <mhocko@kernel.org>,
Shakeel Butt <shakeelb@google.com>,
Muchun Song <muchun.song@linux.dev>,
David Hildenbrand <david@redhat.com>,
Matthew Wilcox <willy@infradead.org>,
Huang Ying <ying.huang@intel.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Peter Xu <peterx@redhat.com>,
"Vishal Moola (Oracle)" <vishal.moola@gmail.com>,
Yue Zhao <findns94@gmail.com>, Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH 1/1] mm: add swapiness= arg to memory.reclaim
Date: Thu, 30 Nov 2023 13:33:40 -0800 [thread overview]
Message-ID: <20231130133340.36140526608289898acb3ac5@linux-foundation.org> (raw)
In-Reply-To: <20231130153658.527556-2-schatzberg.dan@gmail.com>
On Thu, 30 Nov 2023 07:36:54 -0800 Dan Schatzberg <schatzberg.dan@gmail.com> wrote:
> Allow proactive reclaimers to submit an additional swappiness=<val>
> argument to memory.reclaim. This overrides the global or per-memcg
> swappiness setting for that reclaim attempt.
>
> For example:
>
> echo "2M swappiness=0" > /sys/fs/cgroup/memory.reclaim
>
> will perform reclaim on the rootcg with a swappiness setting of 0 (no
> swap) regardless of the vm.swappiness sysctl setting.
>
> Signed-off-by: Dan Schatzberg <schatzberg.dan@gmail.com>
> ---
> include/linux/swap.h | 3 ++-
> mm/memcontrol.c | 55 +++++++++++++++++++++++++++++++++++---------
> mm/vmscan.c | 13 +++++++++--
Documentation/admin-guide/cgroup-v2.rst is feeling unloved!
Please check whether this interface change can lead to
non-backward-compatible userspace. If someone's script does the above
echo command, will it break on older kernels? If so, does it matter?
next prev parent reply other threads:[~2023-11-30 21:33 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-30 15:36 [PATCH 0/1] Add swappiness argument " Dan Schatzberg
2023-11-30 15:36 ` [PATCH 1/1] mm: add swapiness= arg " Dan Schatzberg
2023-11-30 21:33 ` Andrew Morton [this message]
2023-11-30 21:46 ` Dan Schatzberg
2023-12-01 1:56 ` Huan Yang
2023-12-01 2:05 ` Yosry Ahmed
2023-12-01 2:13 ` Huan Yang
2023-12-01 2:17 ` Yosry Ahmed
2023-12-01 2:24 ` Huan Yang
2023-11-30 15:57 ` [PATCH 0/1] Add swappiness argument " Michal Hocko
2023-11-30 16:56 ` Johannes Weiner
2023-11-30 18:49 ` Shakeel Butt
2023-11-30 19:47 ` Dan Schatzberg
2023-11-30 20:30 ` Shakeel Butt
2023-11-30 21:37 ` Dan Schatzberg
2023-11-30 21:52 ` Shakeel Butt
2023-12-01 9:33 ` Michal Hocko
2023-12-01 15:49 ` Dan Schatzberg
2023-12-01 17:09 ` Johannes Weiner
2023-12-04 15:23 ` Michal Hocko
2023-12-05 16:19 ` Johannes Weiner
2023-12-07 18:57 ` Michal Koutný
2023-11-30 18:44 ` Shakeel Butt
2023-11-30 18:54 ` Matthew Wilcox
2023-11-30 19:39 ` Johannes Weiner
2023-11-30 19:49 ` Johannes Weiner
2023-11-30 19:50 ` Dan Schatzberg
2023-12-06 16:28 [PATCH V2 " Dan Schatzberg
2023-12-06 16:28 ` [PATCH 1/1] mm: add swapiness= arg " Dan Schatzberg
2023-12-07 19:00 ` Michal Koutný
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231130133340.36140526608289898acb3ac5@linux-foundation.org \
--to=akpm@linux-foundation.org \
--cc=cgroups@vger.kernel.org \
--cc=david@redhat.com \
--cc=findns94@gmail.com \
--cc=hannes@cmpxchg.org \
--cc=hughd@google.com \
--cc=link@vivo.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@kernel.org \
--cc=muchun.song@linux.dev \
--cc=peterx@redhat.com \
--cc=roman.gushchin@linux.dev \
--cc=schatzberg.dan@gmail.com \
--cc=shakeelb@google.com \
--cc=vishal.moola@gmail.com \
--cc=wangkefeng.wang@huawei.com \
--cc=willy@infradead.org \
--cc=ying.huang@intel.com \
--cc=yosryahmed@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox