X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;ds=inline;f=mm%2FKconfig;h=2888024e0b0abea6b6f37f4531ad0f8dfec5c7b3;hb=14a0d635d18d0fb552dcc979d6d25106e6541f2e;hp=723bbe04a0b0511976d3778a4df94cb2974eb9c8;hpb=8aeab58e560da02772d6018eb4d6923514476a04;p=~andy%2Flinux

diff --git a/mm/Kconfig b/mm/Kconfig
index 723bbe04a0b..2888024e0b0 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:
+	  https://github.com/spartacus06/zsmapbench