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7d6f07d2c5
Now that we have made the inactivation of unlinked inodes a background task to increase the throughput of file deletions, we need to be a little more careful about how long of a delay we can tolerate. On a mostly empty filesystem, the risk of the allocator making poor decisions due to fragmentation of the free space on account a lengthy delay in background updates is minimal because there's plenty of space. However, if free space is tight, we want to deallocate unlinked inodes as quickly as possible to avoid fallocate ENOSPC and to give the allocator the best shot at optimal allocations for new writes. Therefore, queue the percpu worker immediately if the filesystem is more than 95% full. This follows the same principle that XFS becomes less aggressive about speculative allocations and lazy cleanup (and more precise about accounting) when nearing full. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com> |
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| fs | ||
| include | ||
| init | ||
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| kernel | ||
| lib | ||
| LICENSES | ||
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| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
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| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
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| README | ||
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 Restructured Text 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.