diff options
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 121 |
1 files changed, 72 insertions, 49 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 1b501db06417..781be3240e21 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -129,7 +129,6 @@ choice prompt "Default allocator" depends on ZSWAP default ZSWAP_ZPOOL_DEFAULT_ZSMALLOC if MMU - default ZSWAP_ZPOOL_DEFAULT_ZBUD help Selects the default allocator for the compressed cache for swap pages. @@ -140,21 +139,6 @@ choice The selection made here can be overridden by using the kernel command line 'zswap.zpool=' option. -config ZSWAP_ZPOOL_DEFAULT_ZBUD - bool "zbud" - select ZBUD - help - Use the zbud allocator as the default allocator. - -config ZSWAP_ZPOOL_DEFAULT_Z3FOLD_DEPRECATED - bool "z3foldi (DEPRECATED)" - select Z3FOLD_DEPRECATED - help - Use the z3fold allocator as the default allocator. - - Deprecated and scheduled for removal in a few cycles, - see CONFIG_Z3FOLD_DEPRECATED. - config ZSWAP_ZPOOL_DEFAULT_ZSMALLOC bool "zsmalloc" select ZSMALLOC @@ -165,40 +149,9 @@ endchoice config ZSWAP_ZPOOL_DEFAULT string depends on ZSWAP - default "zbud" if ZSWAP_ZPOOL_DEFAULT_ZBUD - default "z3fold" if ZSWAP_ZPOOL_DEFAULT_Z3FOLD_DEPRECATED default "zsmalloc" if ZSWAP_ZPOOL_DEFAULT_ZSMALLOC default "" -config ZBUD - tristate "2:1 compression allocator (zbud)" - depends on ZSWAP - help - A special purpose allocator for storing compressed pages. - It is designed to store up to two compressed pages per physical - page. While this design limits storage density, it has simple and - deterministic reclaim properties that make it preferable to a higher - density approach when reclaim will be used. - -config Z3FOLD_DEPRECATED - tristate "3:1 compression allocator (z3fold) (DEPRECATED)" - depends on ZSWAP - help - Deprecated and scheduled for removal in a few cycles. If you have - a good reason for using Z3FOLD over ZSMALLOC, please contact - linux-mm@kvack.org and the zswap maintainers. - - A special purpose allocator for storing compressed pages. - It is designed to store up to three compressed pages per physical - page. It is a ZBUD derivative so the simplicity and determinism are - still there. - -config Z3FOLD - tristate - default y if Z3FOLD_DEPRECATED=y - default m if Z3FOLD_DEPRECATED=m - depends on Z3FOLD_DEPRECATED - config ZSMALLOC tristate prompt "N:1 compression allocator (zsmalloc)" if (ZSWAP || ZRAM) @@ -242,9 +195,13 @@ menu "Slab allocator options" config SLUB def_bool y +config KVFREE_RCU_BATCHED + def_bool y + depends on !SLUB_TINY && !TINY_RCU + config SLUB_TINY bool "Configure for minimal memory footprint" - depends on EXPERT + depends on EXPERT && !COMPILE_TEST select SLAB_MERGE_DEFAULT help Configures the slab allocator in a way to achieve minimal memory @@ -489,6 +446,9 @@ config SPARSEMEM_VMEMMAP SPARSEMEM_VMEMMAP uses a virtually mapped memmap to optimise pfn_to_page and page_to_pfn operations. This is the most efficient option when sufficient kernel resources are available. + +config SPARSEMEM_VMEMMAP_PREINIT + bool # # Select this config option from the architecture Kconfig, if it is preferred # to enable the feature of HugeTLB/dev_dax vmemmap optimization. @@ -499,6 +459,9 @@ config ARCH_WANT_OPTIMIZE_DAX_VMEMMAP config ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP bool +config ARCH_WANT_HUGETLB_VMEMMAP_PREINIT + bool + config HAVE_MEMBLOCK_PHYS_MAP bool @@ -506,6 +469,10 @@ config HAVE_GUP_FAST depends on MMU bool +# Enable memblock support for scratch memory which is needed for kexec handover +config MEMBLOCK_KHO_SCRATCH + bool + # Don't discard allocated memory used to track "memory" and "reserved" memblocks # after early boot, so it can still be used to test for validity of memory. # Also, memblocks are updated with memory hot(un)plug. @@ -856,11 +823,15 @@ config ARCH_WANT_GENERAL_HUGETLB config ARCH_WANTS_THP_SWAP def_bool n +config MM_ID + def_bool n + menuconfig TRANSPARENT_HUGEPAGE bool "Transparent Hugepage Support" depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE && !PREEMPT_RT select COMPACTION select XARRAY_MULTI + select MM_ID help Transparent Hugepages allows the kernel to use huge pages and huge tlb transparently to the applications whenever possible. @@ -915,7 +886,7 @@ config THP_SWAP config READ_ONLY_THP_FOR_FS bool "Read-only THP for filesystems (EXPERIMENTAL)" - depends on TRANSPARENT_HUGEPAGE && SHMEM + depends on TRANSPARENT_HUGEPAGE help Allow khugepaged to put read-only file-backed pages in THP. @@ -924,8 +895,25 @@ config READ_ONLY_THP_FOR_FS support of file THPs will be developed in the next few release cycles. +config NO_PAGE_MAPCOUNT + bool "No per-page mapcount (EXPERIMENTAL)" + help + Do not maintain per-page mapcounts for pages part of larger + allocations, such as transparent huge pages. + + When this config option is enabled, some interfaces that relied on + this information will rely on less-precise per-allocation information + instead: for example, using the average per-page mapcount in such + a large allocation instead of the per-page mapcount. + + EXPERIMENTAL because the impact of some changes is still unclear. + endif # TRANSPARENT_HUGEPAGE +# simple helper to make the code a bit easier to read +config PAGE_MAPCOUNT + def_bool !NO_PAGE_MAPCOUNT + # # The architecture supports pgtable leaves that is larger than PAGE_SIZE # @@ -1005,6 +993,40 @@ config CMA_AREAS If unsure, leave the default value "8" in UMA and "20" in NUMA. +# +# Select this config option from the architecture Kconfig, if available, to set +# the max page order for physically contiguous allocations. +# +config ARCH_FORCE_MAX_ORDER + int + +# +# When ARCH_FORCE_MAX_ORDER is not defined, +# the default page block order is MAX_PAGE_ORDER (10) as per +# include/linux/mmzone.h. +# +config PAGE_BLOCK_ORDER + int "Page Block Order" + range 1 10 if ARCH_FORCE_MAX_ORDER = 0 + default 10 if ARCH_FORCE_MAX_ORDER = 0 + range 1 ARCH_FORCE_MAX_ORDER if ARCH_FORCE_MAX_ORDER != 0 + default ARCH_FORCE_MAX_ORDER if ARCH_FORCE_MAX_ORDER != 0 + help + The page block order refers to the power of two number of pages that + are physically contiguous and can have a migrate type associated to + them. The maximum size of the page block order is limited by + ARCH_FORCE_MAX_ORDER. + + This config allows overriding the default page block order when the + page block order is required to be smaller than ARCH_FORCE_MAX_ORDER + or MAX_PAGE_ORDER. + + Reducing pageblock order can negatively impact THP generation + success rate. If your workloads uses THP heavily, please use this + option with caution. + + Don't change if unsure. + config MEM_SOFT_DIRTY bool "Track memory changes" depends on CHECKPOINT_RESTORE && HAVE_ARCH_SOFT_DIRTY && PROC_FS @@ -1333,6 +1355,7 @@ config NUMA_MEMBLKS config NUMA_EMU bool "NUMA emulation" depends on NUMA_MEMBLKS + depends on X86 || GENERIC_ARCH_NUMA help Enable NUMA emulation. A flat machine will be split into virtual nodes when booted with "numa=fake=N", where N is the |