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Filipe Manana
c28b97f53b
Now that we track qgroup extent records in a xarray we don't need to have a "bytenr" field in struct btrfs_qgroup_extent_record, since we can get it from the index of the record in the xarray. So remove the field and grab the bytenr from either the index key or any other place where it's available (delayed refs). This reduces the size of struct btrfs_qgroup_extent_record from 40 bytes down to 32 bytes, meaning that we now can store 128 instances of this structure instead of 102 per 4K page. 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.