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9688088378
Set __GFP_ZERO for the shadow page memory cache and drop the explicit clear_page() from kvm_mmu_get_page(). This moves the cost of zeroing a page to the allocation time of the physical page, i.e. when topping up the memory caches, and thus avoids having to zero out an entire page while holding mmu_lock. Cc: Peter Feiner <pfeiner@google.com> Cc: Peter Shier <pshier@google.com> Cc: Junaid Shahid <junaids@google.com> Cc: Jim Mattson <jmattson@google.com> Suggested-by: Ben Gardon <bgardon@google.com> Reviewed-by: Ben Gardon <bgardon@google.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Message-Id: <20200703023545.8771-12-sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@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.