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66d78a1147iomap_zero_range() has to cover various corner cases that are difficult to test on production kernels because it is used in fairly limited use cases. For example, it is currently only used by XFS and mostly only in partial block zeroing cases. While it's possible to test most of these functional cases, we can provide more robust test coverage by co-opting fallocate zero range to invoke zeroing of the entire range instead of the more efficient block punch/allocate sequence. Add an errortag to occasionally invoke forced zeroing. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org> |
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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 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.