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When CONFIG_NVME_TARGET_PASSTHRU as 'passthru' directory will be added to each subsystem. The directory is similar to a namespace and has two attributes: device_path and enable. The user must set the path to the nvme controller's char device and write '1' to enable the subsystem to use passthru. Any given subsystem is prevented from enabling both a regular namespace and the passthru device. If one is enabled, enabling the other will produce an error. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
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.