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Howlett" , Philipp Stanner , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Samsung GOST Subject: [GIT PULL] Rust XArray for v7.4 Date: Mon, 12 Oct 2026 13:50:26 +0200 Message-ID: <20261012115028.73246-1-da.gomez@kernel.org> X-Mailer: git-send-email 2.56.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: B9032140002 X-Rspam-User: X-Stat-Signature: s13anbabt1mkxqu8i3icppwhmyj5uttd X-HE-Tag: 1791806120-628172 X-HE-Meta: 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 tL0Jbigj wdOM14d0pdJx+EEDqBQ3ZTjtyl1mRk+AhdF6gYaLz6tBZNJwXJQHRrrEt+Hg7TDjM66dN+Q9kmvsPN6ERm+SC3sY/hdjca1bj9iSOh4NBRwE+C6MtF5nsfdH8Kzz5mA7P6gz0gQ8G47wTyx0201aCUffhmbVJCgkNmgjAPo4jjZR4wvJUcIeVpd1gRMyLGxEZjiNflaXKZBHNyVyWcxSWHp2J5SZ045VXT/By0qoXil8oLJH3jgYMrEvNW5G8D+ktMxEejkb3mq4PPMMaNkEb8oNI5UmhntHxkY5BBkjtLNNOjQXA+JUVPIihQ6ZsJoXSL8BL+upm1oTifNp40eJ0DACNca880jRHQ4TWVX+RCo9R6k6nayIoCHD6jSBD1ANI6pfJSRTeeMP3J+Y= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Matthew, I'm sending the Rust XArray for the current v7.4 cycle, although it is probably too late for it. Just let me know if you need me to resend it later, rebased or under a different tag. Thanks, Daniel The following changes since commit cee9395acd8043be0644b25c34bfa86623f2b935: Linux 7.3-rc1 (2026-08-30 13:34:40 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/da.gomez/linux.git tags/rxarray-v7.4 for you to fetch changes up to 4ce73d98a0a6e5bba46ed1fc9a61511bdccea776: rust: rxarray: add rust xarray support (2026-10-12 08:36:28 +0200) ---------------------------------------------------------------- Rust XArray for v7.4 Add a Rust implementation of the XArray (rust/kernel/rxarray.rs), introduced as an experimental Rust reference implementation [1] of lib/xarray.c, as discussed at LPC26 [2]. This lets Rust users, such as the null block driver and possibly Tyr (under evaluation), experiment with and evaluate both implementations. The goal is to evaluate whether Rust helps with the most common class of XArray bugs, misuse of the API by its callers, such as the long-dormant page cache corruption that almost blocked the LBS work [3]. The RFC v1 cover letter has the full motivation, benchmark baseline and roadmap [4]. This initial version supports store, load, load_mut and erase. It has been tested with the included KUnit tests and doctests. Outside of rust/kernel/rxarray.rs, this touches: - MAINTAINERS: new XARRAY [RUST] entry, maintained by Daniel Gomez and Matthew Wilcox, with Andreas Hindborg as reviewer. - lib/Kconfig: new XARRAY_RUST option. - rust/kernel/lib.rs: register the rxarray module. The C XArray implementation is unchanged. Link: https://rust-for-linux.com/rust-reference-drivers/ [1] Link: https://lore.kernel.org/all/20261009212431.0-da.gomez@kernel.org/ [2] Link: https://lore.kernel.org/all/A5A976CB-DB57-4513-A700-656580488AB6@flyingcircus.io/ [3] Link: https://lore.kernel.org/all/20260923-rxarray-next-v1-0-92eedf185649@samsung.com/ [4] ---------------------------------------------------------------- Daniel Gomez (1): rust: rxarray: add rust xarray support MAINTAINERS | 12 + lib/Kconfig | 11 + rust/kernel/lib.rs | 2 + rust/kernel/rxarray.rs | 1407 ++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1432 insertions(+) create mode 100644 rust/kernel/rxarray.rs