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| Filename | Latest commit message | Latest commit date |
|---|---|---|
30de24c7dd
Pull x86 cache QoS (RDT/CAR) updates from Thomas Gleixner: "Add support for pseudo-locked cache regions. Cache Allocation Technology (CAT) allows on certain CPUs to isolate a region of cache and 'lock' it. Cache pseudo-locking builds on the fact that a CPU can still read and write data pre-allocated outside its current allocated area on cache hit. With cache pseudo-locking data can be preloaded into a reserved portion of cache that no application can fill, and from that point on will only serve cache hits. The cache pseudo-locked memory is made accessible to user space where an application can map it into its virtual address space and thus have a region of memory with reduced average read latency. The locking is not perfect and gets totally screwed by WBINDV and similar mechanisms, but it provides a reasonable enhancement for certain types of latency sensitive applications. The implementation extends the current CAT mechanism and provides a generally useful exclusive CAT mode on which it builds the extra pseude-locked regions" * 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits) x86/intel_rdt: Disable PMU access x86/intel_rdt: Fix possible circular lock dependency x86/intel_rdt: Make CPU information accessible for pseudo-locked regions x86/intel_rdt: Support restoration of subset of permissions x86/intel_rdt: Fix cleanup of plr structure on error x86/intel_rdt: Move pseudo_lock_region_clear() x86/intel_rdt: Limit C-states dynamically when pseudo-locking active x86/intel_rdt: Support L3 cache performance event of Broadwell x86/intel_rdt: More precise L2 hit/miss measurements x86/intel_rdt: Create character device exposing pseudo-locked region x86/intel_rdt: Create debugfs files for pseudo-locking testing x86/intel_rdt: Create resctrl debug area x86/intel_rdt: Ensure RDT cleanup on exit x86/intel_rdt: Resctrl files reflect pseudo-locked information x86/intel_rdt: Support creation/removal of pseudo-locked region x86/intel_rdt: Pseudo-lock region creation/removal core x86/intel_rdt: Discover supported platforms via prefetch disable bits x86/intel_rdt: Add utilities to test pseudo-locked region possibility x86/intel_rdt: Split resource group removal in two x86/intel_rdt: Enable entering of pseudo-locksetup mode ... |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.