diff options
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 57 |
1 files changed, 48 insertions, 9 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index e113f713b493..e443fe8cd6cf 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -469,6 +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. @@ -882,7 +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. @@ -930,6 +934,13 @@ config ARCH_SUPPORTS_PUD_PFNMAP depends on ARCH_SUPPORTS_HUGE_PFNMAP && HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD # +# Architectures that always use weak definitions for percpu +# variables in modules should set this. +# +config ARCH_MODULE_NEEDS_WEAK_PER_CPU + bool + +# # UP and nommu archs use km based percpu allocator # config NEED_PER_CPU_KM @@ -989,6 +1000,41 @@ 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_MAX_ORDER + int "Page Block Order Upper Limit" + 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 at least limited by + ARCH_FORCE_MAX_ORDER/MAX_PAGE_ORDER. + + This config adds a new upper limit of default page block + order when the page block order is required to be smaller than + ARCH_FORCE_MAX_ORDER/MAX_PAGE_ORDER or other limits + (see include/linux/pageblock-flags.h for details). + + Reducing pageblock order can negatively impact THP generation + success rate. If your workloads use 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 @@ -1071,9 +1117,6 @@ config ARCH_HAS_CURRENT_STACK_POINTER register alias named "current_stack_pointer", this config can be selected. -config ARCH_HAS_PTE_DEVMAP - bool - config ARCH_HAS_ZONE_DMA_SET bool @@ -1091,7 +1134,6 @@ config ZONE_DEVICE depends on MEMORY_HOTPLUG depends on MEMORY_HOTREMOVE depends on SPARSEMEM_VMEMMAP - depends on ARCH_HAS_PTE_DEVMAP select XARRAY_MULTI help @@ -1200,10 +1242,6 @@ config KMAP_LOCAL config KMAP_LOCAL_NON_LINEAR_PTE_ARRAY bool -# struct io_mapping based helper. Selected by drivers that need them -config IO_MAPPING - bool - config MEMFD_CREATE bool "Enable memfd_create() system call" if EXPERT @@ -1317,6 +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 |