Here is the second version for adding heterogeneous memory attributes to the existing node sysfs representation. Background: Platforms may provide multiple types of cpu attached system memory. The memory ranges for each type may have different characteristics that applications may wish to know about when considering what node they want their memory allocated from. It had previously been difficult to describe these setups as memory rangers were generally lumped into the NUMA node of the CPUs. New platform attributes have been created and in use today that describe the more complex memory hierarchies that can be created. This series' objective is to provide the attributes from such systems that are useful for applications to know about, and readily usable with existing tools and libraries. Changes since v1: Reordered the patches. The ACPI and bare-bones HMAT parsing come first. The kernel interfaces, documentation and in-kernel users follow. For correctness, have the new generic ACPI parsing and their callbacks use the acpi union header type instead of the common header. Added node masks in addition to the node symlinks for primary memory and cpu nodes. Altered the naming conventions to clearly indicate the attributes are for primary access and capture the relationship for the new access attributes to their primary nodes. Added Documentation/ABI. Used 'struct device' instead of kobject for memory side caches. Initialize HMAT with subsys_initcall instead of device_init. Combined the numa performance documentation into a single file and moved it to admin-guide/mm/. Changelogs updated with spelling/grammar/editorial fixes, and include additional examples. Keith Busch (12): acpi: Create subtable parsing infrastructure acpi/hmat: Parse and report heterogeneous memory node: Link memory nodes to their compute nodes Documentation/ABI: Add new node sysfs attributes acpi/hmat: Register processor domain to its memory node: Add heterogenous memory performance Documentation/ABI: Add node performance attributes acpi/hmat: Register performance attributes node: Add memory caching attributes Documentation/ABI: Add node cache attributes acpi/hmat: Register memory side cache attributes doc/mm: New documentation for memory performance Documentation/ABI/stable/sysfs-devices-node | 96 ++++++- Documentation/admin-guide/mm/numaperf.rst | 171 ++++++++++++ arch/x86/kernel/acpi/boot.c | 36 +-- drivers/acpi/Kconfig | 9 + drivers/acpi/Makefile | 1 + drivers/acpi/hmat.c | 393 ++++++++++++++++++++++++++++ drivers/acpi/numa.c | 16 +- drivers/acpi/scan.c | 4 +- drivers/acpi/tables.c | 76 +++++- drivers/base/Kconfig | 8 + drivers/base/node.c | 269 +++++++++++++++++++ drivers/irqchip/irq-gic-v3.c | 2 +- drivers/mailbox/pcc.c | 2 +- include/linux/acpi.h | 6 +- include/linux/node.h | 49 ++++ 15 files changed, 1096 insertions(+), 42 deletions(-) create mode 100644 Documentation/admin-guide/mm/numaperf.rst create mode 100644 drivers/acpi/hmat.c -- 2.14.4
