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0dc93e4652
We now have a nodesize_bits member in fs_info so we can index an extent buffer in the backref cache by node number instead of by sector number. While this allows for a denser index space with the possibility of using less maple tree nodes, in practice it's unlikely to hit such benefits since we currently limit the maximum number of keys in the cache to 128, so unless all extent buffers are contiguous we are unlikely to see a memory usage reduction in the backing maple tree due to fewer nodes. Nevertheless it doesn't cost anything to index by node number and it's more logical. Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: Filipe Manana <fdmanana@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 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.