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44e69c9af1
When rmap is enabled, XFS expects a certain order of operations, which is: 1) remove the file mapping, 2) remove the reverse mapping, and then 3) free the blocks. When reflink is enabled, XFS replaces (3) with a deferred refcount decrement operation that can schedule freeing the blocks if that was the last refcount. For realtime files, xfs_bmap_del_extent_real tries to do 1 and 3 in the same transaction, which will break both rmap and reflink unless we switch it to use realtime EFIs. Both rmap and reflink depend on the rtgroups feature, so let's turn on EFIs for all rtgroups filesystems. 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.