afed6271f5
Pipes themselves do not hold the the pipe lock across IO, and hence are safe for RWF_NOWAIT/IOCB_NOWAIT usage. The "contract" for NOWAIT is really "should not do IO under this lock", not strictly that we cannot block or that the below code is in any way atomic. Pipes fulfil that criteria. Acked-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.