[PATCHv8 00/10] Heterogenous memory node attributes

From: Keith Busch
Date: Mon Mar 11 2019 - 16:55:43 EST


== Changes since v7 ==

Fixed an early return that prevented reporting HMAT when there are no
direct attached initiators.

Fixed introducing a variable that was unused until several patches
later.

Miscellaneous typos, editorial clarifications, and whitespace fixups.

Merged to most current linux-next.

Added received review, test, and ack by's.

I've published a git tree available on this branch:

https://git.kernel.org/pub/scm/linux/kernel/git/kbusch/linux.git/log/?h=hmat-v8

== 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. Those applications may query performance
attributes relative to a particular CPU they're running on in order to
make more informed choices for where they want to allocate hot and cold
data. This works with mbind() or the numactl library.

Keith Busch (10):
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
node: Add heterogenous memory access attributes
node: Add memory-side caching attributes
acpi/hmat: Register processor domain to its memory
acpi/hmat: Register performance 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 | 169 +++++++
arch/arm64/kernel/acpi_numa.c | 2 +-
arch/arm64/kernel/smp.c | 4 +-
arch/ia64/kernel/acpi.c | 16 +-
arch/x86/kernel/acpi/boot.c | 36 +-
drivers/acpi/Kconfig | 1 +
drivers/acpi/Makefile | 1 +
drivers/acpi/hmat/Kconfig | 11 +
drivers/acpi/hmat/Makefile | 1 +
drivers/acpi/hmat/hmat.c | 666 ++++++++++++++++++++++++++
drivers/acpi/numa.c | 16 +-
drivers/acpi/scan.c | 4 +-
drivers/acpi/tables.c | 76 ++-
drivers/base/Kconfig | 8 +
drivers/base/node.c | 352 +++++++++++++-
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 | 71 +++
25 files changed, 1489 insertions(+), 66 deletions(-)
create mode 100644 Documentation/admin-guide/mm/numaperf.rst
create mode 100644 drivers/acpi/hmat/Kconfig
create mode 100644 drivers/acpi/hmat/Makefile
create mode 100644 drivers/acpi/hmat/hmat.c

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2.14.4