Linux kernel source tree
Go to file
Linus Torvalds 86d563ac5f f2fs-for-6.18-rc1
This release focuses on two primary updates for Android devices. First, it sets
 hash-based file name lookup as the default method to improve performance, while
 retaining an option to fall back to a linear lookup. Second, it resolves a
 persistent issue with the checkpoint=enable feature. The update further boosts
 performance by prefetching node blocks, merging FUA writes more efficiently, and
 optimizing block allocation policies.
 
 The release is rounded out by a comprehensive set of bug fixes that address
 memory safety, data integrity, and potential system hangs, along with minor
 documentation and code clean-ups.
 
 Enhancement:
  - add mount option and sysfs entry to tune the lookup mode
  - dump more information and add a timeout when enabling/disabling checkpoints
  - readahead node blocks in F2FS_GET_BLOCK_PRECACHE mode
  - merge FUA command with the existing writes
  - allocate HOT_DATA for IPU writes
  - Use allocate_section_policy to control write priority in multi-devices setups
  - add reserved nodes for privileged users
  - Add bggc_io_aware to adjust the priority of BG_GC when issuing IO
  - show the list of donation files
 
 Bug fix:
  - add missing dput() when printing the donation list
  - fix UAF issue in f2fs_merge_page_bio()
  - add sanity check on ei.len in __update_extent_tree_range()
  - fix infinite loop in __insert_extent_tree()
  - fix zero-sized extent for precache extents
  - fix to mitigate overhead of f2fs_zero_post_eof_page()
  - fix to avoid migrating empty section
  - fix to truncate first page in error path of f2fs_truncate()
  - fix to update map->m_next_extent correctly in f2fs_map_blocks()
  - fix wrong layout information on 16KB page
  - fix to do sanity check on node footer for non inode dnode
  - fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()
  - fix to detect potential corrupted nid in free_nid_list
  - fix to clear unusable_cap for checkpoint=enable
  - fix to zero data after EOF for compressed file correctly
  - fix to avoid overflow while left shift operation
  - fix condition in __allow_reserved_blocks()
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE00UqedjCtOrGVvQiQBSofoJIUNIFAmjgDGsACgkQQBSofoJI
 UNICWQ//VJPl1HPhdvWB1QhGIL/kt0/9yxhmgdz3NAeU399NfE9rTvMQC9gunLV0
 EW0o0EUhI/nOM+m/bOKlqwvklYe6AcO4RglXDzE3eq13k3Z3g3phM+YUwXQib/m5
 jRcDWnHwSd9YY5iTHcJlxsVlWBe8nEQXJlHjo6+Iq70bLfT50hTiqPbgYwjoBy+B
 ISolj70XIFXlPsciG9AW7VOGjJBPMsNsRqrd08neYxVycIhC8rcolTLm+8hUQkLc
 9y/E+wYypYlaHrN8jBqYLNOXBffql+9qOFDKAXRwDvfVxt4nIlLUHzcLvtVLDGC3
 hTMPIcKm8D3EwqxY4SjpQH66EkC63XrquFm9zveU4ckJhs4++Kb9uwuKUofNhCWj
 8gw9OKafb8SSoBimjnCpQpXecvfwMbIoTUPJ5ytpNV+q27eBs+pe3lkDcA2O4Xdu
 SEMGeBlrxvOAgrRbnE65uIv/GjXcUK9LqXERuErjNs/YJOrj/ByDT2wJH5yqASwH
 9csO/3fKc91EAGy+Kd49z3E8S2wuoI+22noir/AB7WKyRg5ZO7q3ZiZxqsrc1iJN
 Z/gh0QrWVQVVnn23z8VPArQX2fMZQ8iOMvcM54G+05ipj3mUBNT5eZlyEPb3FcUe
 o4XvTtKkcFhEIawf+WgED07PBpdzz5w1f8hx3EWCLda0LacHILQ=
 =cIQy
 -----END PGP SIGNATURE-----

Merge tag 'f2fs-for-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "This focuses on two primary updates for Android devices.

  First, it sets hash-based file name lookup as the default method to
  improve performance, while retaining an option to fall back to a
  linear lookup.

  Second, it resolves a persistent issue with the 'checkpoint=enable'
  feature.

  The update further boosts performance by prefetching node blocks,
  merging FUA writes more efficiently, and optimizing block allocation
  policies.

  The release is rounded out by a comprehensive set of bug fixes that
  address memory safety, data integrity, and potential system hangs,
  along with minor documentation and code clean-ups.

  Enhancements:
   - add mount option and sysfs entry to tune the lookup mode
   - dump more information and add a timeout when enabling/disabling
     checkpoints
   - readahead node blocks in F2FS_GET_BLOCK_PRECACHE mode
   - merge FUA command with the existing writes
   - allocate HOT_DATA for IPU writes
   - Use allocate_section_policy to control write priority in
     multi-devices setups
   - add reserved nodes for privileged users
   - Add bggc_io_aware to adjust the priority of BG_GC when issuing IO
   - show the list of donation files

  Bug fixes:
   - add missing dput() when printing the donation list
   - fix UAF issue in f2fs_merge_page_bio()
   - add sanity check on ei.len in __update_extent_tree_range()
   - fix infinite loop in __insert_extent_tree()
   - fix zero-sized extent for precache extents
   - fix to mitigate overhead of f2fs_zero_post_eof_page()
   - fix to avoid migrating empty section
   - fix to truncate first page in error path of f2fs_truncate()
   - fix to update map->m_next_extent correctly in f2fs_map_blocks()
   - fix wrong layout information on 16KB page
   - fix to do sanity check on node footer for non inode dnode
   - fix to avoid NULL pointer dereference in
     f2fs_check_quota_consistency()
   - fix to detect potential corrupted nid in free_nid_list
   - fix to clear unusable_cap for checkpoint=enable
   - fix to zero data after EOF for compressed file correctly
   - fix to avoid overflow while left shift operation
   - fix condition in __allow_reserved_blocks()"

* tag 'f2fs-for-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (43 commits)
  f2fs: add missing dput() when printing the donation list
  f2fs: fix UAF issue in f2fs_merge_page_bio()
  f2fs: readahead node blocks in F2FS_GET_BLOCK_PRECACHE mode
  f2fs: add sanity check on ei.len in __update_extent_tree_range()
  f2fs: fix infinite loop in __insert_extent_tree()
  f2fs: fix zero-sized extent for precache extents
  f2fs: fix to mitigate overhead of f2fs_zero_post_eof_page()
  f2fs: fix to avoid migrating empty section
  f2fs: fix to truncate first page in error path of f2fs_truncate()
  f2fs: fix to update map->m_next_extent correctly in f2fs_map_blocks()
  f2fs: fix wrong layout information on 16KB page
  f2fs: clean up error handing of f2fs_submit_page_read()
  f2fs: avoid unnecessary folio_clear_uptodate() for cleanup
  f2fs: merge FUA command with the existing writes
  f2fs: allocate HOT_DATA for IPU writes
  f2fs: Use allocate_section_policy to control write priority in multi-devices setups
  Documentation: f2fs: Reword title
  Documentation: f2fs: Indent compression_mode option list
  Documentation: f2fs: Wrap snippets in literal code blocks
  Documentation: f2fs: Span write hint table section rows
  ...
2025-10-03 14:05:12 -07:00
arch assorted dead code removal around asm/pgtable.h 2025-10-03 11:37:50 -07:00
block Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
Documentation f2fs-for-6.18-rc1 2025-10-03 14:05:12 -07:00
drivers vfs_parse_fs_string() stuff 2025-10-03 10:51:44 -07:00
fs f2fs-for-6.18-rc1 2025-10-03 14:05:12 -07:00
include f2fs-for-6.18-rc1 2025-10-03 14:05:12 -07:00
init Patch series in this pull request: 2025-10-02 18:44:54 -07:00
io_uring Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
ipc namespace-6.18-rc1 2025-09-29 11:20:29 -07:00
kernel vfs_parse_fs_string() stuff 2025-10-03 10:51:44 -07:00
lib Patch series in this pull request: 2025-10-02 18:44:54 -07:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm fuse update for 6.18 2025-10-03 12:48:18 -07:00
net Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
rust Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
samples Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
scripts Patch series in this pull request: 2025-10-02 18:44:54 -07:00
security Simplifying ->d_name audits, easy part. 2025-10-03 11:14:02 -07:00
sound sound updates for 6.18-rc1 2025-10-02 11:37:19 -07:00
tools fuse update for 6.18 2025-10-03 12:48:18 -07:00
usr gen_init_cpio: add -a <data_align> as reflink optimization 2025-08-20 16:02:56 -07:00
virt Merge tag 'kvm-x86-no_assignment-6.17' of https://github.com/kvm-x86/linux into HEAD 2025-07-29 08:36:42 -04:00
.clang-format Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +02:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore .gitignore: ignore compile_commands.json globally 2025-08-12 15:53:55 -07:00
.mailmap Patch series in this pull request: 2025-10-02 18:44:54 -07:00
.pylintrc docs: add a .pylintrc file with sys path for docs scripts 2025-04-09 12:10:33 -06:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Delete inactive maintainers from AF_XDP 2025-09-25 13:18:22 +02:00
Kbuild sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS fuse update for 6.18 2025-10-03 12:48:18 -07:00
Makefile Kbuild updates for 6.18 2025-10-01 20:58:51 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.