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The memory scheme page fault event is a new approch in handling page fault on mkeys using the on-demand-paging feature. The major shift in handling the page fault in this scheme is that the HW is taking responsibilty for parsing the faulted mkey instead of the previous approach where the driver would read and parse the wqes and query the mkeys to get to the direct mkey that we need to handle. Therefore, the event we get from FW in this scheme will contain the direct mkey and address we need to handle and require much less work from driver. Additionally, to optimize performance, the FW can generate the event on a memory area that is larger than the faulted memory operation is requiring, to 'prefetch' memory that is around it and will likely be used soon. Unlike previous types of page fault, the memory page scheme fault does not always require a resume command after handling the page fault as the FW can post multiple events on same mkey and will set the 'last' flag only on the page fault that requires the resume command. Signed-off-by: Michael Guralnik <michaelgur@nvidia.com> Link: https://patch.msgid.link/20240909100504.29797-7-michaelgur@nvidia.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
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.