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6ad1b91470
xfs: less heavy locks during fstrim Congratulations! You have made it to the final patchset of the main online fsck feature! This patchset fixes some stalling behavior that I observed when running FITRIM against large flash-based filesystems with very heavily fragmented free space data. In summary -- the current fstrim implementation optimizes for trimming the largest free extents first, and holds the AGF lock for the duration of the operation. This is great if fstrim is being run as a foreground process by a sysadmin. For xfs_scrub, however, this isn't so good -- we don't really want to block on one huge kernel call while reporting no progress information. We don't want to hold the AGF so long that background processes stall. These problems are easily fixable by issuing smaller FITRIM calls, but there's still the problem of walking the entire cntbt. To solve that second problem, we introduce a new sub-AG FITRIM implementation. To solve the first problem, make it relax the AGF periodically. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'discard-relax-locks-6.10_2024-04-15' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: fix performance problems when fstrimming a subset of a fragmented AG
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.