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8b15c3764c
Now that KVM no longer relies on an ugly heuristic to find its struct page references, i.e. now that KVM can't get false positives on VM_MIXEDMAP pfns, remove KVM's hack to elevate the refcount for pfns that happen to have a valid struct page. In addition to removing a long-standing wart in KVM, this allows KVM to map non-refcounted struct page memory into the guest, e.g. for exposing GPU TTM buffers to KVM guests. Tested-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Sean Christopherson <seanjc@google.com> Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-ID: <20241010182427.1434605-86-seanjc@google.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 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.