diff options
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 84 |
1 files changed, 83 insertions, 1 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 5753f69b23f4..274a315e0684 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -187,7 +187,7 @@ config MEMORY_HOTPLUG bool "Allow for memory hot-add" depends on SPARSEMEM || X86_64_ACPI_NUMA depends on ARCH_ENABLE_MEMORY_HOTPLUG - depends on (IA64 || X86 || PPC_BOOK3S_64 || SUPERH || S390) + depends on (IA64 || X86 || PPC_BOOK3S_64 || SUPERH || S390 || ARM64) config MEMORY_HOTPLUG_SPARSE def_bool y @@ -601,6 +601,16 @@ config ZSMALLOC_STAT information to userspace via debugfs. If unsure, say N. +config VMAP_LAZY_PURGING_FACTOR + int "multiplier to the size of purged vmap areas" + default "8" if ARM + default "32" + help + It is used as a multiplier to the max VA pages purged in a + single attempt. For 32-bit in order to reduce fragmentation + of vmalloc space, we decrease the default value to "8". + + config GENERIC_EARLY_IOREMAP bool @@ -619,6 +629,44 @@ config MAX_STACK_SIZE_MB A sane initial value is 80 MB. +config ZCACHE + bool "Compressed cache for file pages (EXPERIMENTAL)" + depends on CRYPTO && CLEANCACHE + select CRYPTO_LZO + select ZBUD + default n + help + A compressed cache for file pages. + It takes active file pages that are in the process of being reclaimed + and attempts to compress them into a dynamically allocated RAM-based + memory pool. + + If this process is successful, when those file pages needed again, the + I/O reading operation was avoided. This results in a significant performance + gains under memory pressure for systems full with file pages. + +config BALANCE_ANON_FILE_RECLAIM + bool "During reclaim treat anon and file backed pages equally" + depends on SWAP + help + When performing memory reclaim treat anonymous and file backed pages + equally. + Swapping anonymous pages out to memory can be efficient enough to justify + treating anonymous and file backed pages equally. + +config KSWAPD_CPU_AFFINITY_MASK + string "kswapd cpu affinity mask" + depends on SMP + help + Set the cpu affinity for the kswapd task. + There can be power benefits on certain targets when limiting kswapd + to run only on certain cores. + The cpu affinity bitmask is represented by a hex string where commas + group hex digits into chunks. Each chunk defines exactly 32 bits of + the resultant bitmask. + For example to limit kswapd to the first 4 cores use the following: + CONFIG_KSWAPD_CPU_AFFINITY_MASK="f" + # For architectures that support deferred memory initialisation config ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT bool @@ -669,3 +717,37 @@ config ZONE_DEVICE config FRAME_VECTOR bool + +config FORCE_ALLOC_FROM_DMA_ZONE + bool "Force certain memory allocators to always return ZONE_DMA memory" + depends on ZONE_DMA + help + Ensure certain memory allocators always return memory from ZONE_DMA. + This option helps ensure that clients who require ZONE_DMA memory are + always using ZONE_DMA memory. + + If unsure, say "n". + +config PROCESS_RECLAIM + bool "Enable process reclaim" + depends on PROC_FS + default n + help + It allows to reclaim pages of the process by /proc/pid/reclaim. + + (echo file > /proc/PID/reclaim) reclaims file-backed pages only. + (echo anon > /proc/PID/reclaim) reclaims anonymous pages only. + (echo all > /proc/PID/reclaim) reclaims all pages. + + (echo addr size-byte > /proc/PID/reclaim) reclaims pages in + (addr, addr + size-bytes) of the process. + + Any other vaule is ignored. + +config VM_MAX_READAHEAD + int "default max readahead window size" + default 128 + help + This sets the VM_MAX_READAHEAD value to allow the readahead window + to grow to a maximum size of configured. This will benefit sequential + read throughput and thus early boot performance. |