Verstion three adding heterogeneous memory attributes to existing node
sysfs subsystem.
== 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 v2 ==
Fixed the arch specific build breakage from modifying the acpi table
parsing. This one has been in a public tree for 0-day and no failures
reported after several weeks.
The HMAT parsing rules is split in its own patch. This was originally
intended to be a starting point to enable auto-detect a use for
enabling memory randomization:
https://lkml.org/lkml/2018/12/17/1116
But will leave them split for separate consideration and bring
randomization auto-enable back when these settle.
The previous version's node interface allowed expressing the
relationship only among the best locality nodes, called "primary"
initiators and targets. Based on public and private feedback, the
interface has been augmented to allow registering nodes under a "class"
hierarchy. If a subsystem wishes to express node relationships beyond
the best, they may create additional access classes. The HMAT subsystem
this series only registers the best performing class, "class0".
Various changelog and documentation updates and clarifications.
Keith Busch (13):
acpi: Create subtable parsing infrastructure
acpi: Add HMAT to generic parsing tables
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 access attributes
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 | 87 +++++-
Documentation/admin-guide/mm/numaperf.rst | 184 +++++++++++++
arch/arm64/kernel/acpi_numa.c | 2 +-
arch/arm64/kernel/smp.c | 4 +-
arch/ia64/kernel/acpi.c | 12 +-
arch/x86/kernel/acpi/boot.c | 36 +--
drivers/acpi/Kconfig | 9 +
drivers/acpi/Makefile | 1 +
drivers/acpi/hmat.c | 375 ++++++++++++++++++++++++++
drivers/acpi/numa.c | 16 +-
drivers/acpi/scan.c | 4 +-
drivers/acpi/tables.c | 76 +++++-
drivers/base/Kconfig | 8 +
drivers/base/node.c | 317 +++++++++++++++++++++-
drivers/irqchip/irq-gic-v2m.c | 2 +-
drivers/irqchip/irq-gic-v3-its-pci-msi.c | 2 +-
drivers/irqchip/irq-gic-v3-its-platform-msi.c | 2 +-
drivers/irqchip/irq-gic-v3-its.c | 6 +-
drivers/irqchip/irq-gic-v3.c | 10 +-
drivers/irqchip/irq-gic.c | 4 +-
drivers/mailbox/pcc.c | 2 +-
include/linux/acpi.h | 6 +-
include/linux/node.h | 70 ++++-
23 files changed, 1170 insertions(+), 65 deletions(-)
create mode 100644 Documentation/admin-guide/mm/numaperf.rst
create mode 100644 drivers/acpi/hmat.c
--
2.14.4
