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a1d86e8dec
Currently on-disk feature checks require decoding the superblock fileds and so can be non-trivial. We have almost 400 hundred individual feature checks in the XFS code, so this is a significant amount of code. To reduce runtime check overhead, pre-process all the version flags into a features field in the xfs_mount at mount time so we can convert all the feature checks to a simple flag check. There is also a need to convert the dynamic feature flags to update the m_features field. This is required for attr, attr2 and quota features. New xfs_mount based wrappers are added for this. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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.