5c64aba517
Tweak the "page fault can be fast" logic to explicitly check for !PRESENT faults in the access tracking case, and drop the exec/NX check that becomes redundant as a result. No sane hardware will generate an access that is both an instruct fetch and a write, i.e. it's a waste of cycles. If hardware goes off the rails, or KVM runs under a misguided hypervisor, spuriously running throught fast path is benign (KVM has been uknowingly being doing exactly that for years). Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220423034752.1161007-6-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
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.