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eca9dc2089Completions for pure overwrites don't need to be deferred to a workqueue as there is no work to be done, or at least no work that needs a user context. Set the IOMAP_DIO_INLINE_COMP by default for writes like we already do for reads, and the clear it for all the cases that actually do need a user context for completions to update the inode size or record updates to the logical to physical mapping. I've audited all users of the ->end_io callback, and they only require user context for I/O that involves unwritten extents, COW, size extensions, or error handling and all those are still run from workqueue context. This restores the behavior of the old pre-iomap direct I/O code. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://patch.msgid.link/20251113170633.1453259-5-hch@lst.de Signed-off-by: Christian Brauner <brauner@kernel.org> |
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| README | ||
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.