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0c89138970
Relocation is one of the most complex part of btrfs, while it's also the foundation stone for online resizing, profile converting. For such a complex facility, we should at least have some introduction to it. This patch will add an basic introduction at pretty a high level, explaining: - What relocation does - How relocation is done Only mentioning how data reloc tree and reloc tree are involved in the operation. No details like the backref cache, or the data reloc tree contents. - Which function to refer. More detailed comments will be added for reloc tree creation, data reloc tree creation and backref cache. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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.