mm/debug-pagealloc: make debug-pagealloc boottime configurable

[linux-2.6-block.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 24539d1c7d2504361bcf43a1193dc511c0d53702..6f067954675b903e5520d89784ba6cafced90271 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -829,6 +829,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        CONFIG_DEBUG_PAGEALLOC, hence this option will not help
                        tracking down these problems.
 
+       debug_pagealloc=
+                       [KNL] When CONFIG_DEBUG_PAGEALLOC is set, this
+                       parameter enables the feature at boot time. In
+                       default, it is disabled. We can avoid allocating huge
+                       chunk of memory for debug pagealloc if we don't enable
+                       it at boot time and the system will work mostly same
+                       with the kernel built without CONFIG_DEBUG_PAGEALLOC.
+                       on: enable the feature
+
        debugpat        [X86] Enable PAT debugging
 
        decnet.addr=    [HW,NET]