4dcd1cae72
The data update path requires special support for unwritten extents - we still need to be able to move them, but there's no need to read or write anything. This patch adds a new error code to tell bch2_move_extent() that we're short circuiting the read, and adds bch2_update_unwritten_extent() to create a reservation then call __bch2_data_update_index_update(). Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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.