xref: /linux/Documentation/ABI/stable/sysfs-devices-node (revision 08d9dbe72b1f899468b2b34f9309e88a84f440f2)

What:		/sys/devices/system/node/possible
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		Nodes that could be possibly become online at some point.

What:		/sys/devices/system/node/online
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		Nodes that are online.

What:		/sys/devices/system/node/has_normal_memory
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		Nodes that have regular memory.

What:		/sys/devices/system/node/has_cpu
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		Nodes that have one or more CPUs.

What:		/sys/devices/system/node/has_high_memory
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		Nodes that have regular or high memory.
		Depends on CONFIG_HIGHMEM.

What:		/sys/devices/system/node/nodeX
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		When CONFIG_NUMA is enabled, this is a directory containing
		information on node X such as what CPUs are local to the
		node. Each file is detailed next.

What:		/sys/devices/system/node/nodeX/cpumap
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		The node's cpumap.

What:		/sys/devices/system/node/nodeX/cpulist
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		The CPUs associated to the node.

What:		/sys/devices/system/node/nodeX/meminfo
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		Provides information about the node's distribution and memory
		utilization. Similar to /proc/meminfo, see Documentation/filesystems/proc.txt

What:		/sys/devices/system/node/nodeX/numastat
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		The node's hit/miss statistics, in units of pages.
		See Documentation/numastat.txt

What:		/sys/devices/system/node/nodeX/distance
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		Distance between the node and all the other nodes
		in the system.

What:		/sys/devices/system/node/nodeX/vmstat
Date:		October 2002
Contact:	Linux Memory Management list <linux-mm@kvack.org>
Description:
		The node's zoned virtual memory statistics.
		This is a superset of numastat.

What:		/sys/devices/system/node/nodeX/compact
Date:		February 2010
Contact:	Mel Gorman <mel@csn.ul.ie>
Description:
		When this file is written to, all memory within that node
		will be compacted. When it completes, memory will be freed
		into blocks which have as many contiguous pages as possible

What:		/sys/devices/system/node/nodeX/hugepages/hugepages-<size>/
Date:		December 2009
Contact:	Lee Schermerhorn <lee.schermerhorn@hp.com>
Description:
		The node's huge page size control/query attributes.
		See Documentation/admin-guide/mm/hugetlbpage.rst

What:		/sys/devices/system/node/nodeX/accessY/
Date:		December 2018
Contact:	Keith Busch <keith.busch@intel.com>
Description:
		The node's relationship to other nodes for access class "Y".

What:		/sys/devices/system/node/nodeX/accessY/initiators/
Date:		December 2018
Contact:	Keith Busch <keith.busch@intel.com>
Description:
		The directory containing symlinks to memory initiator
		nodes that have class "Y" access to this target node's
		memory. CPUs and other memory initiators in nodes not in
		the list accessing this node's memory may have different
		performance.

What:		/sys/devices/system/node/nodeX/accessY/targets/
Date:		December 2018
Contact:	Keith Busch <keith.busch@intel.com>
Description:
		The directory containing symlinks to memory targets that
		this initiator node has class "Y" access.