From: sashiko-bot@kernel.org
To: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
Cc: virtualization@lists.linux.dev,
"Michael S. Tsirkin" <mst@redhat.com>,
"Eugenio Perez" <eperezma@redhat.com>
Subject: Re: [PATCH 2/4] fuse: don't move pipe buffers into the page cache
Date: Wed, 11 Nov 2026 02:35:41 +0000 [thread overview]
Message-ID: <sashiko-outbox-208100@kernel.org> (raw)
In-Reply-To: <20261110145241.536019-3-kas@kernel.org>
> A splice() into /dev/fuse with SPLICE_F_MOVE lets the reply to a read
> request steal full pages from the pipe. Each stolen page replaces, in
> the fuse file's page cache, the folio that the request allocated. The
> page can be a page cache folio of another file, a page written into the
> pipe, or a gifted user page.
>
> Always copy. The server sees the same data, and the move was a hint
> that splice() never promised to honour.
>
> Keep advertising FUSE_SPLICE_MOVE. libfuse fails the mount of a
> filesystem that asks for a capability the kernel does not offer.
>
> Preparation for removing ->try_steal() from pipe buffers.
>
> Suggested-by: David Hildenbrand (Arm) <david@kernel.org>
> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
> Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261110145241.536019-1-kas@kernel.org?part=2
next prev parent reply other threads:[~2026-11-11 2:35 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-10 14:52 [PATCH 0/4] splice: remove pipe buffer stealing Kiryl Shutsemau (Meta)
2026-11-10 14:52 ` [PATCH 1/4] virtio_console: copy pipe buffers in splice_write() Kiryl Shutsemau (Meta)
2026-11-10 16:24 ` Zi Yan
2026-11-10 19:19 ` Matthew Wilcox
2026-11-11 12:36 ` Christian Brauner
2026-11-11 13:42 ` Christian Brauner
2026-11-11 16:43 ` Linus Torvalds
2026-11-11 18:53 ` Christian Brauner
2026-11-11 19:26 ` Linus Torvalds
2026-11-12 8:55 ` Arnd Bergmann
2026-11-12 9:09 ` David Hildenbrand (Arm)
2026-11-12 9:25 ` Arnd Bergmann
2026-11-12 9:28 ` David Hildenbrand (Arm)
2026-11-12 10:56 ` Arnd Bergmann
2026-11-12 11:34 ` Arnd Bergmann
2026-11-12 17:12 ` Linus Torvalds
2026-11-11 2:30 ` sashiko-bot
2026-11-10 14:52 ` [PATCH 2/4] fuse: don't move pipe buffers into the page cache Kiryl Shutsemau (Meta)
2026-11-10 16:25 ` Zi Yan
2026-11-11 2:35 ` sashiko-bot [this message]
2026-11-11 9:02 ` Miklos Szeredi
2026-11-10 14:52 ` [PATCH 3/4] splice: remove pipe buffer stealing Kiryl Shutsemau (Meta)
2026-11-11 2:39 ` sashiko-bot
2026-11-10 14:52 ` [PATCH 4/4] splice: replace nosteal_pipe_buf_ops with default_pipe_buf_ops Kiryl Shutsemau (Meta)
2026-11-11 2:43 ` sashiko-bot
2026-11-10 15:59 ` [PATCH 0/4] splice: remove pipe buffer stealing Linus Torvalds
2026-11-11 11:06 ` Christian Brauner
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=sashiko-outbox-208100@kernel.org \
--to=sashiko-bot@kernel.org \
--cc=eperezma@redhat.com \
--cc=kas@kernel.org \
--cc=mst@redhat.com \
--cc=sashiko-reviews@lists.linux.dev \
--cc=virtualization@lists.linux.dev \
/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.