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Merge tag 'for-6.18-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs updates from David Sterba:
"There are no new features, the changes are in the core code, notably
tree-log error handling and reporting improvements, and initial
support for block size > page size.
Performance improvements:
- search data checksums in the commit root (previous transaction) to
avoid locking contention, this improves parallelism of read
heavy/low write workloads, and also reduces transaction commit
time; on real and reproducer workload the sync time went from
minutes to tens of seconds (workload and numbers are in the
changelog)
Core:
- tree-log updates:
- error handling improvements, transaction aborts
- add new error state 'O' (printed in status messages) when log
replay fails and is aborted
- reduced number of btrfs_path allocations when traversing the
tree
- 'block size > page size' support
- basic implementation with limitations, under experimental build
- limitations: no direct io, raid56, encoded read (standalone and
in send ioctl), encoded write
- preparatory work for compression, removing implicit assumptions
of page and block sizes
- compression workspaces are now per-filesystem, we cannot assume
common block size for work memory among different filesystems
- tree-checker now verifies INODE_EXTREF item (which is implementing
hardlinks)
- tree leaf pretty printer updates, there were missing data from
items, keys/items
- move config option CONFIG_BTRFS_REF_VERIFY to CONFIG_BTRFS_DEBUG,
it's a debugging feature and not needed to be enabled separately
- more struct btrfs_path auto free updates
- use ref_tracker API for tracking delayed inodes, enabled by mount
option 'ref_verify', allowing to better pinpoint leaking references
- in zoned mode, avoid selecting data relocation zoned for ordinary
data block groups
- updated and enhanced error messages
- lots of cleanups and refactoring"
* tag 'for-6.18-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (113 commits)
btrfs: use smp_mb__after_atomic() when forcing COW in create_pending_snapshot()
btrfs: add unlikely annotations to branches leading to transaction abort
btrfs: add unlikely annotations to branches leading to EIO
btrfs: add unlikely annotations to branches leading to EUCLEAN
btrfs: more trivial BTRFS_PATH_AUTO_FREE conversions
btrfs: zoned: don't fail mount needlessly due to too many active zones
btrfs: use kmalloc_array() for open-coded arithmetic in kmalloc()
btrfs: enable experimental bs > ps support
btrfs: add extra ASSERT()s to catch unaligned bios
btrfs: fix symbolic link reading when bs > ps
btrfs: prepare scrub to support bs > ps cases
btrfs: prepare zlib to support bs > ps cases
btrfs: prepare lzo to support bs > ps cases
btrfs: prepare zstd to support bs > ps cases
btrfs: prepare compression folio alloc/free for bs > ps cases
btrfs: fix the incorrect max_bytes value for find_lock_delalloc_range()
btrfs: remove pointless key offset setup in create_pending_snapshot()
btrfs: annotate btrfs_is_testing() as unlikely and make it return bool
btrfs: make the rule checking more readable for should_cow_block()
btrfs: simplify inline extent end calculation at replay_one_extent()
...
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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.