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b9b71f4368
Buffer split_desc_cache, the cache used to allcoate rmap list entries, only by the default cache capacity (currently 40), not by doubling the minimum (513). Aliasing L2 GPAs to L1 GPAs is uncommon, thus eager page splitting is unlikely to need 500+ entries. And because each object is a non-trivial 128 bytes (see struct pte_list_desc), those extra ~500 entries means KVM is in all likelihood wasting ~64kb of memory per VM. Link: https://lore.kernel.org/all/YrTDcrsn0%2F+alpzf@google.com Cc: David Matlack <dmatlack@google.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220624171808.2845941-4-seanjc@google.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.