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46bb6765d3
We already determine the owner for any blocks we find when we're relocating, and for COW-only blocks (and the data reloc tree) we COW down to the block and call it good enough. However we still build a whole backref tree for them, even though we're not going to use it, and then just don't put these blocks in the cache. Rework the code to check if the block belongs to a COW-only root or the data reloc root, and then just cow down to the block, skipping the backref cache generation. Reviewed-by: Boris Burkov <boris@bur.io> Signed-off-by: Josef Bacik <josef@toxicpanda.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.