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Filipe Manana
1c6cbbbeee
When starting a reflink operation we have these calls to inode_dio_wait() which used to be needed because direct IO writes that don't cross the i_size boundary did not take the inode's VFS lock, so we could race with them and end up with ordered extents in target range after calling btrfs_wait_ordered_range(). However that is not the case anymore, because the inode's VFS lock was changed from a mutex to a rw semaphore, by commit9902af79c0("parallel lookups: actual switch to rwsem"), and several years later we started to lock the inode's VFS lock in shared mode for direct IO writes that don't cross the i_size boundary (commite9adabb971("btrfs: use shared lock for direct writes within EOF")). So remove those inode_dio_wait() calls. Signed-off-by: Filipe Manana <fdmanana@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.