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| author | Dave Jiang <dave.jiang@intel.com> | 2024-03-08 22:59:31 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2024-03-12 22:54:03 +0100 |
| commit | debdce20c4f28b7e5aa48512e7abf270a00e9051 (patch) | |
| tree | 265c2b8bc3307f2d8d3d3978a108355dd59261ab /drivers/base/node.c | |
| parent | cxl/region: Add memory hotplug notifier for cxl region (diff) | |
| download | linux-debdce20c4f28b7e5aa48512e7abf270a00e9051.tar.xz linux-debdce20c4f28b7e5aa48512e7abf270a00e9051.zip | |
cxl/region: Deal with numa nodes not enumerated by SRAT
For the numa nodes that are not created by SRAT, no memory_target is
allocated and is not managed by the HMAT_REPORTING code. Therefore
hmat_callback() memory hotplug notifier will exit early on those NUMA
nodes. The CXL memory hotplug notifier will need to call
node_set_perf_attrs() directly in order to setup the access sysfs
attributes.
In acpi_numa_init(), the last proximity domain (pxm) id created by SRAT is
stored. Add a helper function acpi_node_backed_by_real_pxm() in order to
check if a NUMA node id is defined by SRAT or created by CFMWS.
node_set_perf_attrs() symbol is exported to allow update of perf attribs
for a node. The sysfs path of
/sys/devices/system/node/nodeX/access0/initiators/* is created by
node_set_perf_attrs() for the various attributes where nodeX is matched
to the NUMA node of the CXL region.
Cc: Rafael J. Wysocki <rafael@kernel.org>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20240308220055.2172956-13-dave.jiang@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/base/node.c')
| -rw-r--r-- | drivers/base/node.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c index a73b0c9a401a..eb72580288e6 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -215,6 +215,7 @@ void node_set_perf_attrs(unsigned int nid, struct access_coordinate *coord, } } } +EXPORT_SYMBOL_GPL(node_set_perf_attrs); /** * struct node_cache_info - Internal tracking for memory node caches |