Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

[linux-2.6-block.git] / Documentation / sysctl / vm.txt

diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
index f72370b440b121e718183ea6a7dbb9bafc2dcc25..89a887c7662930844ea59850e65866bbd43c3786 100644 (file)
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@ -42,6 +42,8 @@ Currently, these files are in /proc/sys/vm:
 - min_slab_ratio
 - min_unmapped_ratio
 - mmap_min_addr
+- mmap_rnd_bits
+- mmap_rnd_compat_bits
 - nr_hugepages
 - nr_overcommit_hugepages
 - nr_trim_pages         (only if CONFIG_MMU=n)
@@ -135,7 +137,7 @@ Contains, as a percentage of total available memory that contains free pages
 and reclaimable pages, the number of pages at which the background kernel
 flusher threads will start writing out dirty data.
 
-The total avaiable memory is not equal to total system memory.
+The total available memory is not equal to total system memory.
 
 ==============================================================
 
@@ -170,7 +172,7 @@ Contains, as a percentage of total available memory that contains free pages
 and reclaimable pages, the number of pages at which a process which is
 generating disk writes will itself start writing out dirty data.
 
-The total avaiable memory is not equal to total system memory.
+The total available memory is not equal to total system memory.
 
 ==============================================================
 
@@ -485,6 +487,33 @@ against future potential kernel bugs.
 
 ==============================================================
 
+mmap_rnd_bits:
+
+This value can be used to select the number of bits to use to
+determine the random offset to the base address of vma regions
+resulting from mmap allocations on architectures which support
+tuning address space randomization.  This value will be bounded
+by the architecture's minimum and maximum supported values.
+
+This value can be changed after boot using the
+/proc/sys/vm/mmap_rnd_bits tunable
+
+==============================================================
+
+mmap_rnd_compat_bits:
+
+This value can be used to select the number of bits to use to
+determine the random offset to the base address of vma regions
+resulting from mmap allocations for applications run in
+compatibility mode on architectures which support tuning address
+space randomization.  This value will be bounded by the
+architecture's minimum and maximum supported values.
+
+This value can be changed after boot using the
+/proc/sys/vm/mmap_rnd_compat_bits tunable
+
+==============================================================
+
 nr_hugepages
 
 Change the minimum size of the hugepage pool.