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Formal big pcluster design is actually more powerful / flexable than the previous thought whose pclustersize was fixed as power-of-2 blocks, which was obviously inefficient and space-wasting. Instead, pclustersize can now be set independently for each pcluster, so various pcluster sizes can also be used together in one file if mkfs wants (for example, according to data type and/or compression ratio). Let's get rid of previous physical_clusterbits[] setting (also notice that corresponding on-disk fields are still 0 for now). Therefore, head1/2 can be used for at most 2 different algorithms in one file and again pclustersize is now independent of these. Link: https://lore.kernel.org/r/20210407043927.10623-2-xiang@kernel.org Acked-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <hsiangkao@redhat.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.
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