From: Dan Williams <dan.j.williams@intel.com>
To: tglx@linutronix.de, mingo@redhat.com
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@redhat.com>,
Michal Hocko <mhocko@suse.com>, Ira Weiny <ira.weiny@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Christoph Hellwig <hch@lst.de>,
linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org,
x86@kernel.org
Subject: [PATCH v3 6/6] libnvdimm/e820: Retrieve and populate correct 'target_node' info
Date: Mon, 20 Jan 2020 11:03:22 -0800 [thread overview]
Message-ID: <157954700254.2239526.1027195131592572065.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <157954696789.2239526.17707265517154476652.stgit@dwillia2-desk3.amr.corp.intel.com>
Use the new phys_to_target_node() and numa_map_to_online_node() helpers
to retrieve the correct id for the 'numa_node' ("local" / online
initiator node) and 'target_node' (offline target memory node) sysfs
attributes.
Below is an example from a 4 numa node system where all the memory on
node2 is pmem / reserved. It should be noted that with the arrival of
the ACPI HMAT table and EFI Specific Purpose Memory the kernel will
start to see more platforms with reserved / performance differentiated
memory in its own numa node. Hence all the stakeholders on the Cc for
what is ostensibly a libnvdimm local patch.
=== Before ===
/* Notice no online memory on node2 at start */
# numactl --hardware
available: 3 nodes (0-1,3)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
node 0 size: 3958 MB
node 0 free: 3708 MB
node 1 cpus: 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
node 1 size: 4027 MB
node 1 free: 3871 MB
node 3 cpus:
node 3 size: 3994 MB
node 3 free: 3971 MB
node distances:
node 0 1 3
0: 10 21 21
1: 21 10 21
3: 21 21 10
/*
* Put the pmem namespace into devdax mode so it can be assigned to the
* kmem driver
*/
# ndctl create-namespace -e namespace0.0 -m devdax -f
{
"dev":"namespace0.0",
"mode":"devdax",
"map":"dev",
"size":"3.94 GiB (4.23 GB)",
"uuid":"1650af9b-9ba3-4704-acd6-10178399d9a3",
[..]
}
/* Online Persistent Memory as System RAM */
# daxctl reconfigure-device --mode=system-ram dax0.0
libdaxctl: memblock_in_dev: dax0.0: memory0: Unable to determine phys_index: Success
libdaxctl: memblock_in_dev: dax0.0: memory0: Unable to determine phys_index: Success
libdaxctl: memblock_in_dev: dax0.0: memory0: Unable to determine phys_index: Success
libdaxctl: memblock_in_dev: dax0.0: memory0: Unable to determine phys_index: Success
[
{
"chardev":"dax0.0",
"size":4225761280,
"target_node":0,
"mode":"system-ram"
}
]
reconfigured 1 device
/* Note that the memory is onlined by default to the wrong node, node0 */
# numactl --hardware
available: 3 nodes (0-1,3)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
node 0 size: 7926 MB
node 0 free: 7655 MB
node 1 cpus: 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
node 1 size: 4027 MB
node 1 free: 3871 MB
node 3 cpus:
node 3 size: 3994 MB
node 3 free: 3971 MB
node distances:
node 0 1 3
0: 10 21 21
1: 21 10 21
3: 21 21 10
=== After ===
/* Notice that the "phys_index" error messages are gone */
# daxctl reconfigure-device --mode=system-ram dax0.0
[
{
"chardev":"dax0.0",
"size":4225761280,
"target_node":2,
"mode":"system-ram"
}
]
reconfigured 1 device
/* Notice that node2 is now correctly populated */
# numactl --hardware
available: 4 nodes (0-3)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
node 0 size: 3958 MB
node 0 free: 3793 MB
node 1 cpus: 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
node 1 size: 4027 MB
node 1 free: 3851 MB
node 2 cpus:
node 2 size: 3968 MB
node 2 free: 3968 MB
node 3 cpus:
node 3 size: 3994 MB
node 3 free: 3908 MB
node distances:
node 0 1 2 3
0: 10 21 21 21
1: 21 10 21 21
2: 21 21 10 21
3: 21 21 21 10
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
arch/x86/Kconfig | 1 +
drivers/nvdimm/e820.c | 18 ++++--------------
2 files changed, 5 insertions(+), 14 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5e8949953660..3a827fe7afd6 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1660,6 +1660,7 @@ config X86_PMEM_LEGACY
depends on PHYS_ADDR_T_64BIT
depends on BLK_DEV
select X86_PMEM_LEGACY_DEVICE
+ select KEEP_NUMA if NUMA
select LIBNVDIMM
help
Treat memory marked using the non-standard e820 type of 12 as used
diff --git a/drivers/nvdimm/e820.c b/drivers/nvdimm/e820.c
index e02f60ad6c99..4cd18be9d0e9 100644
--- a/drivers/nvdimm/e820.c
+++ b/drivers/nvdimm/e820.c
@@ -7,6 +7,7 @@
#include <linux/memory_hotplug.h>
#include <linux/libnvdimm.h>
#include <linux/module.h>
+#include <linux/numa.h>
static int e820_pmem_remove(struct platform_device *pdev)
{
@@ -16,27 +17,16 @@ static int e820_pmem_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_MEMORY_HOTPLUG
-static int e820_range_to_nid(resource_size_t addr)
-{
- return memory_add_physaddr_to_nid(addr);
-}
-#else
-static int e820_range_to_nid(resource_size_t addr)
-{
- return NUMA_NO_NODE;
-}
-#endif
-
static int e820_register_one(struct resource *res, void *data)
{
struct nd_region_desc ndr_desc;
struct nvdimm_bus *nvdimm_bus = data;
+ int nid = phys_to_target_node(res->start);
memset(&ndr_desc, 0, sizeof(ndr_desc));
ndr_desc.res = res;
- ndr_desc.numa_node = e820_range_to_nid(res->start);
- ndr_desc.target_node = ndr_desc.numa_node;
+ ndr_desc.numa_node = numa_map_to_online_node(nid);
+ ndr_desc.target_node = nid;
set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc))
return -ENXIO;
prev parent reply other threads:[~2020-01-20 19:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 19:02 [PATCH v3 0/6] Memory Hierarchy: Enable target node lookups for reserved memory Dan Williams
2020-01-20 19:02 ` [PATCH v3 1/6] ACPI: NUMA: Up-level "map to online node" functionality Dan Williams
2020-01-20 19:02 ` [PATCH v3 2/6] mm/numa: Skip NUMA_NO_NODE and online nodes in numa_map_to_online_node() Dan Williams
2020-01-21 1:36 ` Aneesh Kumar K.V
2020-01-21 3:09 ` Dan Williams
2020-01-20 19:03 ` [PATCH v3 3/6] powerpc/papr_scm: Switch to numa_map_to_online_node() Dan Williams
2020-01-20 19:03 ` [PATCH v3 4/6] x86/mm: Introduce CONFIG_KEEP_NUMA Dan Williams
2020-01-20 19:03 ` [PATCH v3 5/6] x86/numa: Provide a range-to-target_node lookup facility Dan Williams
2020-01-20 19:03 ` Dan Williams [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=157954700254.2239526.1027195131592572065.stgit@dwillia2-desk3.amr.corp.intel.com \
--to=dan.j.williams@intel.com \
--cc=akpm@linux-foundation.org \
--cc=dave.hansen@linux.intel.com \
--cc=david@redhat.com \
--cc=hch@lst.de \
--cc=ira.weiny@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nvdimm@lists.01.org \
--cc=luto@kernel.org \
--cc=mhocko@suse.com \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=vishal.l.verma@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).