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.
Pavel Begunkov
authored
Commit fb5ccc98 ("io_uring: Fix broken links with offloading") introduced a potential performance regression with unconditionally taking mm even for READ/WRITE_FIXED operations. Return the logic handling it back. mm-faulted requests will go through the generic submission path, so honoring links and drains, but will fail further on req->has_user check. Fixes: fb5ccc98 ("io_uring: Fix broken links with offloading") Cc: stable@vger.kernel.org # v5.4 Signed-off-by:Pavel Begunkov <asml.silence@gmail.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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