diff options
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 72 |
1 files changed, 31 insertions, 41 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index e443fe8cd6cf..0e26f4fc8717 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -9,9 +9,6 @@ menu "Memory Management options" config ARCH_NO_SWAP bool -config ZPOOL - bool - menuconfig SWAP bool "Support for paging of anonymous memory (swap)" depends on MMU && BLOCK && !ARCH_NO_SWAP @@ -26,7 +23,7 @@ config ZSWAP bool "Compressed cache for swap pages" depends on SWAP select CRYPTO - select ZPOOL + select ZSMALLOC help A lightweight compressed cache for swap pages. It takes pages that are in the process of being swapped out and attempts to @@ -125,45 +122,18 @@ config ZSWAP_COMPRESSOR_DEFAULT default "zstd" if ZSWAP_COMPRESSOR_DEFAULT_ZSTD default "" -choice - prompt "Default allocator" - depends on ZSWAP - default ZSWAP_ZPOOL_DEFAULT_ZSMALLOC if MMU - help - Selects the default allocator for the compressed cache for - swap pages. - The default is 'zbud' for compatibility, however please do - read the description of each of the allocators below before - making a right choice. +config ZSMALLOC + tristate - The selection made here can be overridden by using the kernel - command line 'zswap.zpool=' option. +if ZSMALLOC -config ZSWAP_ZPOOL_DEFAULT_ZSMALLOC - bool "zsmalloc" - select ZSMALLOC - help - Use the zsmalloc allocator as the default allocator. -endchoice +menu "Zsmalloc allocator options" + depends on ZSMALLOC -config ZSWAP_ZPOOL_DEFAULT - string - depends on ZSWAP - default "zsmalloc" if ZSWAP_ZPOOL_DEFAULT_ZSMALLOC - default "" - -config ZSMALLOC - tristate - prompt "N:1 compression allocator (zsmalloc)" if (ZSWAP || ZRAM) - depends on MMU - help - zsmalloc is a slab-based memory allocator designed to store - pages of various compression levels efficiently. It achieves - the highest storage density with the least amount of fragmentation. +comment "Zsmalloc is a common backend allocator for zswap & zram" config ZSMALLOC_STAT bool "Export zsmalloc statistics" - depends on ZSMALLOC select DEBUG_FS help This option enables code in the zsmalloc to collect various @@ -175,7 +145,6 @@ config ZSMALLOC_CHAIN_SIZE int "Maximum number of physical pages per-zspage" default 8 range 4 16 - depends on ZSMALLOC help This option sets the upper limit on the number of physical pages that a zmalloc page (zspage) can consist of. The optimal zspage @@ -190,10 +159,15 @@ config ZSMALLOC_CHAIN_SIZE For more information, see zsmalloc documentation. +endmenu + +endif + menu "Slab allocator options" config SLUB def_bool y + select IRQ_WORK config KVFREE_RCU_BATCHED def_bool y @@ -439,9 +413,8 @@ config SPARSEMEM_VMEMMAP_ENABLE bool config SPARSEMEM_VMEMMAP - bool "Sparse Memory virtual memmap" + def_bool y depends on SPARSEMEM && SPARSEMEM_VMEMMAP_ENABLE - default y help SPARSEMEM_VMEMMAP uses a virtually mapped memmap to optimise pfn_to_page and page_to_pfn operations. This is the most @@ -776,7 +749,6 @@ config MEMORY_FAILURE depends on MMU depends on ARCH_SUPPORTS_MEMORY_FAILURE bool "Enable recovery from hardware memory errors" - select MEMORY_ISOLATION select RAS help Enables code to recover from some memory failures on systems @@ -823,6 +795,22 @@ config ARCH_WANT_GENERAL_HUGETLB config ARCH_WANTS_THP_SWAP def_bool n +config PERSISTENT_HUGE_ZERO_FOLIO + bool "Allocate a PMD sized folio for zeroing" + depends on TRANSPARENT_HUGEPAGE + help + Enable this option to reduce the runtime refcounting overhead + of the huge zero folio and expand the places in the kernel + that can use huge zero folios. For instance, block I/O benefits + from access to large folios for zeroing memory. + + With this option enabled, the huge zero folio is allocated + once and never freed. One full huge page's worth of memory shall + be used. + + Say Y if your system has lots of memory. Say N if you are + memory constrained. + config MM_ID def_bool n @@ -1381,6 +1369,8 @@ config PT_RECLAIM Note: now only empty user PTE page table pages will be reclaimed. +config FIND_NORMAL_PAGE + def_bool n source "mm/damon/Kconfig" |