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774a99b47b
Give the xfs_bmap_intent an active reference to the perag structure data. This reference will be used to enable scrub intent draining functionality in subsequent patches. Later, shrink will use these passive references to know if an AG is quiesced or not. The reason why we take a passive ref for a file mapping operation is simple: we're committing to some sort of action involving space in an AG, so we want to indicate our interest in that AG. The space is already allocated, so we need to be able to operate on AGs that are offline or being shrunk. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.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 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.