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e464d8e8bb
Make the bmap intent items take an active reference to the rtgroup containing the space that is being mapped or unmapped. We will need this functionality once we start enabling rmap and reflink on the rt volume. Technically speaking we need it even for !rtgroups filesystems to prevent the (dummy) rtgroup 0 from going away, even though this will never happen. As a bonus, we can rework the xfs_bmap_deferred_class tracepoint to use the xfs_group object to figure out the type and group number, widen the group block number field to fit 64-bit quantities, and get rid of the now redundant opdev and rtblock fields. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
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.