admin-guide/mm/hugetlbpage.rst

20 system call or standard SYSV shared memory system calls (shmget, shmat).
32 size of the arguments to system calls that map huge page regions.
64 	pages when the system is under memory pressure.
87 the user when the system is under memory pressure.  Please try again later.
94 pool, a user with appropriate privilege can use either the mmap system call
95 or shared memory system calls to use the huge pages.  See the discussion of
173 	echo 20 > /proc/sys/vm/nr_hugepages
176 huge page pool to 20, allocating or freeing huge pages, as required.
189 physically contiguous memory that is present in system at the time of the
191 some nodes in a NUMA system, it will attempt to make up the difference by
195 System administrators may want to put this command in one of the local rc
200 distribution of huge pages in a NUMA system, use::
202 	cat /sys/devices/system/node/node*/meminfo | fgrep Huge
297     numactl --interleave <node-list> echo 20 \
302     numactl -m <node-list> echo 20 >/proc/sys/vm/nr_hugepages_mempolicy
304 This will allocate or free ``abs(20 - nr_hugepages)`` to or from the nodes
306 is initially less than or greater than 20, respectively.  No huge pages will be
339    interleaving over all nodes in the system or cpuset.
344    subset of the system nodes to allocate huge pages outside the cpuset
354 described above, will be replicated under each the system device of each
357 	/sys/devices/system/node/node[0-9]*/hugepages/
391 If the user applications are going to request huge pages using mmap system
392 call, then it is required that system administrator mount a file system of
403 file system.  By default the ``uid`` and ``gid`` of the current process
406 The ``mode`` option sets the mode of root of file system to value & 01777.
439 While read system calls are supported on files that reside on hugetlb
440 file systems, write system calls are not.
446 applications are going to use only shmat/shmget system calls or mmap with
451 members of a supplementary group and system admin needs to configure that gid