admin-guide/mm/numa_memory_policy.rst

10 supported platforms with Non-Uniform Memory Access architectures since 2.4.?.
16 (``Documentation/admin-guide/cgroup-v1/cpusets.rst``)
19 programming interface that a NUMA-aware application can take advantage of.  When
28 ------------------------
39 	up, the system default policy will be set to interleave
41 	not to overload the initial boot node with boot-time
45 	this is an optional, per-task policy.  When defined for a
61 	In a multi-threaded task, task policies apply only to the thread
98 	  mapping-- i.e., at Copy-On-Write.
101 	  virtual address space--a.k.a. threads--independent of when
106 	  are NOT inheritable across exec().  Thus, only NUMA-aware
109 	* A task may install a new VMA policy on a sub-range of a
126 	policies--using the mbind() system call specifying a range of
138 	support allocation at fault time--a.k.a lazy allocation--so hugetlbfs
161 -----------------------------
175 Default Mode--MPOL_DEFAULT
178 	policy scopes.  Any existing non-default policy will simply be
191 	be non-empty.
206 	Internally, the Preferred policy uses a single node--the
227 	Interleave mode indexes the set of nodes specified by the
236 	For allocation of page cache pages, Interleave mode indexes
258 	Weighted interleave allocates pages on nodes according to a
271         Many), preferred node (Preferred) or nodemask (Bind, Interleave) is
275 	With this flag, if the user-specified nodes overlap with the
281 	mems 1-3 that sets an Interleave policy over the same set.  If
282 	the cpuset's mems change to 3-5, the Interleave will now occur
284 	3 is allowed from the user's nodemask, the "interleave" only
296 	set of allowed nodes.  The kernel stores the user-passed nodemask,
302 	nodes, the node (Preferred) or nodemask (Bind, Interleave) is
306 	1,3,5 may be remapped to 7-9 and then to 1-3 if the set of
313 	Bind or Interleave case, the third and fifth) nodes in the set of
319 	the user's nodemask when the set of allowed nodes is only 0-3),
324 	mems 2-5 that sets an Interleave policy over the same set with
325 	MPOL_F_RELATIVE_NODES.  If the cpuset's mems change to 3-7, the
326 	interleave now occurs over nodes 3,5-7.  If the cpuset's mems
327 	then change to 0,2-3,5, then the interleave occurs over nodes
328 	0,2-3,5.
334 	memory nodes 0 to N-1, where N is the number of memory nodes the
359 During run-time "usage" of the policy, we attempt to minimize atomic operations
400    used for non-shared policies.  For this reason, shared policies are marked
401    as such, and the extra reference is dropped "conditionally"--i.e., only
495 The numactl(8) tool is packaged with the run-time version of the library
497 package the headers and compile-time libraries in a separate development