From: Dan Williams <dan.j.williams@intel.com>
To: tglx@linutronix.de, mingo@redhat.com
Cc: David Hildenbrand <david@redhat.com>,
Borislav Petkov <bp@alien8.de>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
kbuild test robot <lkp@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Michal Hocko <mhocko@suse.com>, Paul Mackerras <paulus@samba.org>,
Christoph Hellwig <hch@lst.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Michael Ellerman <mpe@ellerman.id.au>,
x86@kernel.org, Andy Lutomirski <luto@kernel.org>,
linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org
Subject: [PATCH v4 0/6] Memory Hierarchy: Enable target node lookups for reserved memory
Date: Tue, 21 Jan 2020 19:04:35 -0800 [thread overview]
Message-ID: <157966227494.2508551.7206194169374588977.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
Changes since v3 [1]:
- Cleanup numa_map_to_online_node() to remove redundant "if
(!node_online(node))" (Aneesh)
[1]: http://lore.kernel.org/r/157954696789.2239526.17707265517154476652.stgit@dwillia2-desk3.amr.corp.intel.com
---
Merge notes:
x86 folks: This has an ack from Rafael for ACPI, and Michael for Power.
With an x86 ack I plan to take this through the libnvdimm tree provided
the x86 touches look ok to you.
---
Cover:
Arrange for platform numa info to be preserved for determining
'target_node' data. Where a 'target_node' is the node a reserved memory
range will become when it is onlined.
This new infrastructure is expected to be more valuable over time for
Memory Tiers / Hierarchy management as more platforms (via the ACPI HMAT
and EFI Specific Purpose Memory) publish reserved or "soft-reserved"
ranges to Linux. Linux system administrators will expect to be able to
interact with those ranges with a unique numa node number when/if that
memory is onlined via the dax_kmem driver [2].
One configuration that currently fails to properly convey the target
node for the resulting memory hotplug operation is persistent memory
defined by the memmap=nn!ss parameter. For example, today if node1 is a
memory only node, and all the memory from node1 is specified to
memmap=nn!ss and subsequently onlined, it will end up being onlined as
node0 memory. As it stands, memory_add_physaddr_to_nid() can only
identify online nodes and since node1 in this example has no online cpus
/ memory the target node is initialized node0.
The fix is to preserve rather than discard the numa_meminfo entries that
are relevant for reserved memory ranges, and to uplevel the node
distance helper for determining the "local" (closest) node relative to
an initiator node.
[2]: https://pmem.io/ndctl/daxctl-reconfigure-device.html
---
Dan Williams (6):
ACPI: NUMA: Up-level "map to online node" functionality
mm/numa: Skip NUMA_NO_NODE and online nodes in numa_map_to_online_node()
powerpc/papr_scm: Switch to numa_map_to_online_node()
x86/mm: Introduce CONFIG_KEEP_NUMA
x86/numa: Provide a range-to-target_node lookup facility
libnvdimm/e820: Retrieve and populate correct 'target_node' info
arch/powerpc/platforms/pseries/papr_scm.c | 21 --------
arch/x86/Kconfig | 1
arch/x86/mm/numa.c | 74 +++++++++++++++++++++++------
drivers/acpi/numa/srat.c | 41 ----------------
drivers/nvdimm/e820.c | 18 ++-----
include/linux/acpi.h | 23 +++++++++
include/linux/numa.h | 23 +++++++++
mm/Kconfig | 5 ++
mm/mempolicy.c | 31 ++++++++++++
9 files changed, 145 insertions(+), 92 deletions(-)
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next reply other threads:[~2020-01-22 3:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 3:04 Dan Williams [this message]
2020-01-22 3:04 ` [PATCH v4 1/6] ACPI: NUMA: Up-level "map to online node" functionality Dan Williams
2020-01-22 3:04 ` [PATCH v4 2/6] mm/numa: Skip NUMA_NO_NODE and online nodes in numa_map_to_online_node() Dan Williams
2020-01-22 3:04 ` [PATCH v4 3/6] powerpc/papr_scm: Switch to numa_map_to_online_node() Dan Williams
2020-01-22 3:04 ` [PATCH v4 4/6] x86/mm: Introduce CONFIG_KEEP_NUMA Dan Williams
2020-02-13 9:32 ` Ingo Molnar
2020-02-13 21:19 ` Dan Williams
2020-02-13 11:22 ` Thomas Gleixner
2020-02-13 21:21 ` Dan Williams
2020-01-22 3:05 ` [PATCH v4 5/6] x86/numa: Provide a range-to-target_node lookup facility Dan Williams
2020-02-13 9:36 ` Ingo Molnar
2020-02-13 11:37 ` Thomas Gleixner
2020-02-13 21:40 ` Dan Williams
2020-01-22 3:05 ` [PATCH v4 6/6] libnvdimm/e820: Retrieve and populate correct 'target_node' info Dan Williams
2020-02-13 2:28 ` [PATCH v4 0/6] Memory Hierarchy: Enable target node lookups for reserved memory Dan Williams
2020-02-13 9:37 ` Ingo Molnar
2020-02-16 20:00 ` [PATCH v5 " Dan Williams
2020-02-16 20:00 ` [PATCH v5 1/6] ACPI: NUMA: Up-level "map to online node" functionality Dan Williams
2020-02-16 20:00 ` [PATCH v5 2/6] mm/numa: Skip NUMA_NO_NODE and online nodes in numa_map_to_online_node() Dan Williams
2020-02-16 20:00 ` [PATCH v5 3/6] powerpc/papr_scm: Switch to numa_map_to_online_node() Dan Williams
2020-02-16 20:01 ` [PATCH v5 4/6] x86/mm: Introduce CONFIG_NUMA_KEEP_MEMINFO Dan Williams
2020-02-17 8:21 ` Thomas Gleixner
2020-02-16 20:01 ` [PATCH v5 5/6] x86/NUMA: Provide a range-to-target_node lookup facility Dan Williams
2020-02-17 8:22 ` Thomas Gleixner
2020-02-16 20:01 ` [PATCH v5 6/6] libnvdimm/e820: Retrieve and populate correct 'target_node' info Dan Williams
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