abebb16254
The vdpa_sim_blk simulator uses a ramdisk as the backend. To test live migration, we need two devices that share the backend to have the data synchronized with each other. Add a new module parameter to make the buffer shared between all devices. The shared_buffer_mutex is used just to ensure that each operation is atomic, but it is up to the user to use the devices knowing that the underlying ramdisk is shared. For example, when we do a migration, the VMM (e.g., QEMU) will guarantee to write to the destination device, only after completing operations with the source device. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20230407133658.66339-3-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.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.