1What:		/sys/devices/system/node/possible
2Date:		October 2002
3Contact:	Linux Memory Management list <linux-mm@kvack.org>
4Description:
5		Nodes that could be possibly become online at some point.
6
7What:		/sys/devices/system/node/online
8Date:		October 2002
9Contact:	Linux Memory Management list <linux-mm@kvack.org>
10Description:
11		Nodes that are online.
12
13What:		/sys/devices/system/node/has_normal_memory
14Date:		October 2002
15Contact:	Linux Memory Management list <linux-mm@kvack.org>
16Description:
17		Nodes that have regular memory.
18
19What:		/sys/devices/system/node/has_cpu
20Date:		October 2002
21Contact:	Linux Memory Management list <linux-mm@kvack.org>
22Description:
23		Nodes that have one or more CPUs.
24
25What:		/sys/devices/system/node/has_high_memory
26Date:		October 2002
27Contact:	Linux Memory Management list <linux-mm@kvack.org>
28Description:
29		Nodes that have regular or high memory.
30		Depends on CONFIG_HIGHMEM.
31
32What:		/sys/devices/system/node/nodeX
33Date:		October 2002
34Contact:	Linux Memory Management list <linux-mm@kvack.org>
35Description:
36		When CONFIG_NUMA is enabled, this is a directory containing
37		information on node X such as what CPUs are local to the
38		node. Each file is detailed next.
39
40What:		/sys/devices/system/node/nodeX/cpumap
41Date:		October 2002
42Contact:	Linux Memory Management list <linux-mm@kvack.org>
43Description:
44		The node's cpumap.
45
46What:		/sys/devices/system/node/nodeX/cpulist
47Date:		October 2002
48Contact:	Linux Memory Management list <linux-mm@kvack.org>
49Description:
50		The CPUs associated to the node.
51
52What:		/sys/devices/system/node/nodeX/meminfo
53Date:		October 2002
54Contact:	Linux Memory Management list <linux-mm@kvack.org>
55Description:
56		Provides information about the node's distribution and memory
57		utilization. Similar to /proc/meminfo, see Documentation/filesystems/proc.rst
58
59What:		/sys/devices/system/node/nodeX/numastat
60Date:		October 2002
61Contact:	Linux Memory Management list <linux-mm@kvack.org>
62Description:
63		The node's hit/miss statistics, in units of pages.
64		See Documentation/admin-guide/numastat.rst
65
66What:		/sys/devices/system/node/nodeX/distance
67Date:		October 2002
68Contact:	Linux Memory Management list <linux-mm@kvack.org>
69Description:
70		Distance between the node and all the other nodes
71		in the system.
72
73What:		/sys/devices/system/node/nodeX/vmstat
74Date:		October 2002
75Contact:	Linux Memory Management list <linux-mm@kvack.org>
76Description:
77		The node's zoned virtual memory statistics.
78		This is a superset of numastat.
79
80What:		/sys/devices/system/node/nodeX/compact
81Date:		February 2010
82Contact:	Mel Gorman <mel@csn.ul.ie>
83Description:
84		When this file is written to, all memory within that node
85		will be compacted. When it completes, memory will be freed
86		into blocks which have as many contiguous pages as possible
87
88What:		/sys/devices/system/node/nodeX/hugepages/hugepages-<size>/
89Date:		December 2009
90Contact:	Lee Schermerhorn <lee.schermerhorn@hp.com>
91Description:
92		The node's huge page size control/query attributes.
93		See Documentation/admin-guide/mm/hugetlbpage.rst
94
95What:		/sys/devices/system/node/nodeX/accessY/
96Date:		December 2018
97Contact:	Keith Busch <keith.busch@intel.com>
98Description:
99		The node's relationship to other nodes for access class "Y".
100
101What:		/sys/devices/system/node/nodeX/accessY/initiators/
102Date:		December 2018
103Contact:	Keith Busch <keith.busch@intel.com>
104Description:
105		The directory containing symlinks to memory initiator
106		nodes that have class "Y" access to this target node's
107		memory. CPUs and other memory initiators in nodes not in
108		the list accessing this node's memory may have different
109		performance.
110
111What:		/sys/devices/system/node/nodeX/accessY/targets/
112Date:		December 2018
113Contact:	Keith Busch <keith.busch@intel.com>
114Description:
115		The directory containing symlinks to memory targets that
116		this initiator node has class "Y" access.
117
118What:		/sys/devices/system/node/nodeX/accessY/initiators/read_bandwidth
119Date:		December 2018
120Contact:	Keith Busch <keith.busch@intel.com>
121Description:
122		This node's read bandwidth in MB/s when accessed from
123		nodes found in this access class's linked initiators.
124
125What:		/sys/devices/system/node/nodeX/accessY/initiators/read_latency
126Date:		December 2018
127Contact:	Keith Busch <keith.busch@intel.com>
128Description:
129		This node's read latency in nanoseconds when accessed
130		from nodes found in this access class's linked initiators.
131
132What:		/sys/devices/system/node/nodeX/accessY/initiators/write_bandwidth
133Date:		December 2018
134Contact:	Keith Busch <keith.busch@intel.com>
135Description:
136		This node's write bandwidth in MB/s when accessed from
137		found in this access class's linked initiators.
138
139What:		/sys/devices/system/node/nodeX/accessY/initiators/write_latency
140Date:		December 2018
141Contact:	Keith Busch <keith.busch@intel.com>
142Description:
143		This node's write latency in nanoseconds when access
144		from nodes found in this class's linked initiators.
145
146What:		/sys/devices/system/node/nodeX/memory_side_cache/indexY/
147Date:		December 2018
148Contact:	Keith Busch <keith.busch@intel.com>
149Description:
150		The directory containing attributes for the memory-side cache
151		level 'Y'.
152
153What:		/sys/devices/system/node/nodeX/memory_side_cache/indexY/indexing
154Date:		December 2018
155Contact:	Keith Busch <keith.busch@intel.com>
156Description:
157		The caches associativity indexing: 0 for direct mapped,
158		non-zero if indexed.
159
160What:		/sys/devices/system/node/nodeX/memory_side_cache/indexY/line_size
161Date:		December 2018
162Contact:	Keith Busch <keith.busch@intel.com>
163Description:
164		The number of bytes accessed from the next cache level on a
165		cache miss.
166
167What:		/sys/devices/system/node/nodeX/memory_side_cache/indexY/size
168Date:		December 2018
169Contact:	Keith Busch <keith.busch@intel.com>
170Description:
171		The size of this memory side cache in bytes.
172
173What:		/sys/devices/system/node/nodeX/memory_side_cache/indexY/write_policy
174Date:		December 2018
175Contact:	Keith Busch <keith.busch@intel.com>
176Description:
177		The cache write policy: 0 for write-back, 1 for write-through,
178		other or unknown.
179