Lines Matching +full:- +full:- +full:enable +full:- +full:sparse
1 # SPDX-License-Identifier: GPL-2.0-only
33 compress them into a dynamically allocated RAM-based memory pool.
39 bool "Enable the compressed cache for swap pages by default"
62 swapped out again, it will be re-compressed.
190 linux-mm@kvack.org and the zswap maintainers.
208 zsmalloc is a slab-based memory allocator designed to store
223 int "Maximum number of physical pages per-zspage"
256 If you cannot migrate to SLUB, please contact linux-mm@kvack.org
325 sanity-checking than others. This option is most effective with
330 bool "Enable SLUB performance statistics"
339 Try running: slabinfo -DA
376 utilization of a direct-mapped memory-side-cache. See section
379 the presence of a memory-side-cache. There are also incidental
389 after runtime detection of a direct-mapped memory-side-cache.
405 On non-ancient distros (post-2000 ones) N is usually a safe choice.
420 ELF-FDPIC binfmt's brk and stack allocator.
424 userspace. Since that isn't generally a problem on no-MMU systems,
427 See Documentation/admin-guide/mm/nommu-mmap.rst for more information.
448 This option is best suited for non-NUMA systems with
455 choose "Sparse Memory".
460 bool "Sparse Memory"
464 memory hot-plug systems. This is normal.
468 hot-plug and hot-remove.
498 # an extremely sparse physical address space.
508 bool "Sparse Memory virtual memmap"
517 # to enable the feature of HugeTLB/dev_dax vmemmap optimization.
538 # Keep arch NUMA mapping infrastructure post-init.
584 See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
586 Say Y here if you want all hot-plugged memory blocks to appear in
588 Say N here if you want the default policy to keep all hot-plugged
607 # Heavily threaded applications may benefit from splitting the mm-wide
611 # ARM's adjust_pte (unused if VIPT) depends on mm-wide page_table_lock.
612 # PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.
614 # a per-page lock leads to problems when multiple tables need to be locked
664 linux-mm@kvack.org.
721 int "Maximum scale factor of PCP (Per-CPU pageset) batch allocate/free"
725 In page allocator, PCP (Per-CPU pageset) is refilled and drained in
735 bool "Enable bounce buffers"
739 Enable bounce buffers for devices that cannot access the full range of
748 bool "Enable KSM for page merging"
752 Enable Kernel Samepage Merging: KSM periodically scans those areas
787 bool "Enable recovery from hardware memory errors"
808 allocator for chunks in 2^N*PAGE_SIZE amounts - which is frequently
817 long-term mappings means that the space is wasted.
827 See Documentation/admin-guide/mm/nommu-mmap.rst for more information.
887 bool "Read-only THP for filesystems (EXPERIMENTAL)"
891 Allow khugepaged to put read-only file-backed pages in THP.
926 subsystems to allocate big physically-contiguous blocks of memory.
974 soft-dirty bit on pte-s. This bit it set when someone writes
978 See Documentation/admin-guide/mm/soft-dirty.rst for more details.
984 int "Default maximum user stack size for 32-bit processes (MB)"
989 This is the maximum stack size in Megabytes in the VM layout of 32-bit
1019 bool "Enable idle page tracking"
1028 See Documentation/admin-guide/mm/idle_page_tracking.rst for
1038 checking, an architecture-agnostic way to find the stack pointer
1070 "device-physical" addresses which is needed for using a DAX
1108 Enable the definition of PG_arch_x page flags with x > 1. Only
1109 suitable for 64-bit architectures with CONFIG_FLATMEM or
1111 enough room for additional bits in page->flags.
1115 bool "Enable VM event counters for /proc/vmstat" if EXPERT
1130 bool "Enable infrastructure for get_user_pages()-related unit tests"
1134 to make ioctl calls that can launch kernel-based unit tests for
1139 the non-_fast variants.
1141 There is also a sub-test that allows running dump_page() on any
1143 range of user-space addresses. These pages are either pinned via
1156 tristate "Enable a module to run time tests on dma_pool"
1191 bool "Enable memfd_create() system call" if EXPERT
1195 bool "Enable memfd_secret() system call" if EXPERT
1198 Enable the memfd_secret() system call with the ability to create
1217 bool "Enable userfaultfd() system call"
1220 Enable the userfaultfd() system call that allows to intercept and
1240 purposes. It is required to enable userfaultfd write protection on
1241 file-backed memory types like shmem and hugetlbfs.
1243 # multi-gen LRU {
1245 bool "Multi-Gen LRU"
1247 # make sure folio->flags has enough spare bits
1251 Documentation/admin-guide/mm/multigen_lru.rst for details.
1254 bool "Enable by default"
1257 This option enables the multi-gen LRU by default.
1263 Do not enable this option unless you plan to look at historical stats
1266 This option has a per-memcg and per-node memory overhead.
1276 Allow per-vma locking during page fault handling.