mm: larger stack guard gap, between vmas

[linux-block.git] / Documentation / admin-guide / kernel-parameters.txt

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 15f79c27748df1611b1643b77ca68e2a5e7cfaab..7737ab5d04b2941621df23b7fc83a4cdba36e5ba 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -866,6 +866,15 @@
 
        dscc4.setup=    [NET]
 
+       dt_cpu_ftrs=    [PPC]
+                       Format: {"off" | "known"}
+                       Control how the dt_cpu_ftrs device-tree binding is
+                       used for CPU feature discovery and setup (if it
+                       exists).
+                       off: Do not use it, fall back to legacy cpu table.
+                       known: Do not pass through unknown features to guests
+                       or userspace, only those that the kernel is aware of.
+
        dump_apple_properties   [X86]
                        Dump name and content of EFI device properties on
                        x86 Macs.  Useful for driver authors to determine
@@ -3802,6 +3811,13 @@
                        expediting.  Set to zero to disable automatic
                        expediting.
 
+       stack_guard_gap=        [MM]
+                       override the default stack gap protection. The value
+                       is in page units and it defines how many pages prior
+                       to (for stacks growing down) resp. after (for stacks
+                       growing up) the main stack are reserved for no other
+                       mapping. Default value is 256 pages.
+
        stacktrace      [FTRACE]
                        Enabled the stack tracer on boot up.