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973fb26e81
If cow_file_range_async fails to allocate the asynchronous writeback context, it currently returns an error and entirely fails the writeback. This is not a good idea as a writeback failure is a non-temporary error condition that will make the file system unusable. Just fall back to synchronous uncompressed writeback instead. This requires us to delay setting the BTRFS_INODE_HAS_ASYNC_EXTENT flag until we've committed to the async writeback. The compression checks INODE_NOCOMPRESS and FORCE_COMPRESS are moved from cow_file_range_async to the preceding checks btrfs_run_delalloc_range(). Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.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.