From: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
To: 天狼 <rockeet@gmail.com>
Cc: "David Hildenbrand (Arm)" <david@kernel.org>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
"Liam R. Howlett" <liam@infradead.org>,
Vlastimil Babka <vbabka@kernel.org>,
Jann Horn <jannh@google.com>,
Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>
Subject: Re: [RFC] madvise: best-effort deferred writeback for shared file mappings
Date: Wed, 30 Sep 2026 13:11:30 +0100 [thread overview]
Message-ID: <arz8Plu6J4YOTi0a@gremlin> (raw)
In-Reply-To: <arz0auULA33fqoWu@gremlin>
On Wed, Sep 30, 2026 at 01:08:33PM +0100, Lorenzo Stoakes (ARM) wrote:
> I'd say in general the shape of the solution would be something
> cgroups-ish, but since all of this is global stuff and the knobs are all
> global I think you need to think about your design a little more.
(Sorry to be clear, this is - if we accepted that this was a kernel issue that
truly needed something like this - which I do not. The solution here is to use
shared memory as per below.)
> And in general we've seen a pattern of 'writes to MAP_SHARED, experiences
> problems' before.
>
> And the solution is generally - use something like memfd, have a process
> that does writebacks manually for you as you need.
>
> So I strongly suggest you do that! :)
>
> --
> Cheers, Lorenzo
--
Cheers, Lorenzo
next prev parent reply other threads:[~2026-09-30 12:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 7:07 [RFC] madvise: best-effort deferred writeback for shared file mappings 天狼
2026-09-28 11:29 ` David Hildenbrand (Arm)
2026-09-28 13:09 ` 天狼
2026-09-28 19:12 ` David Hildenbrand (Arm)
2026-09-29 4:06 ` 天狼
2026-09-29 6:59 ` David Hildenbrand (Arm)
2026-09-29 8:59 ` Lorenzo Stoakes (ARM)
2026-09-30 10:27 ` 天狼
2026-09-30 11:38 ` David Hildenbrand (Arm)
2026-09-30 12:08 ` Lorenzo Stoakes (ARM)
2026-09-30 12:11 ` Lorenzo Stoakes (ARM) [this message]
2026-09-30 14:14 ` 天狼
2026-09-30 14:24 ` Lorenzo Stoakes (ARM)
2026-09-30 15:33 ` Lorenzo Stoakes (ARM)
2026-09-30 15:29 ` 天狼
2026-09-30 15:43 ` Lorenzo Stoakes (ARM)
2026-09-30 16:38 ` Jan Kara
2026-10-01 4:28 ` 天狼
2026-10-01 8:35 ` Lorenzo Stoakes (ARM)
2026-10-01 13:21 ` 天狼
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=arz8Plu6J4YOTi0a@gremlin \
--to=ljs@kernel.org \
--cc=david@kernel.org \
--cc=jack@suse.cz \
--cc=jannh@google.com \
--cc=liam@infradead.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=rockeet@gmail.com \
--cc=vbabka@kernel.org \
--cc=willy@infradead.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.