X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=mm%2FKconfig;h=2d9f1504d75e26d45ddf58fe2db8c048ecbc8d83;hb=f3b6a488a670f1be2666ab97e31dcfc0b1648884;hp=723bbe04a0b0511976d3778a4df94cb2974eb9c8;hpb=2d08cd0ef89a24f5eb6c6801c48cd06bca230d6d;p=mirror_ubuntu-artful-kernel.git diff --git a/mm/Kconfig b/mm/Kconfig index 723bbe04a0b0..2d9f1504d75e 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -552,3 +552,28 @@ config MEM_SOFT_DIRTY it can be cleared by hands. See Documentation/vm/soft-dirty.txt for more details. + +config ZSMALLOC + bool "Memory allocator for compressed pages" + depends on MMU + default n + help + zsmalloc is a slab-based memory allocator designed to store + compressed RAM pages. zsmalloc uses virtual memory mapping + in order to reduce fragmentation. However, this results in a + non-standard allocator interface where a handle, not a pointer, is + returned by an alloc(). This handle must be mapped in order to + access the allocated space. + +config PGTABLE_MAPPING + bool "Use page table mapping to access object in zsmalloc" + depends on ZSMALLOC + help + By default, zsmalloc uses a copy-based object mapping method to + access allocations that span two pages. However, if a particular + architecture (ex, ARM) performs VM mapping faster than copying, + then you should select this. This causes zsmalloc to use page table + mapping rather than copying for object mapping. + + You can check speed with zsmalloc benchmark[1]. + [1] https://github.com/spartacus06/zsmalloc