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-rw-r--r--Documentation/vm/slub.txt7
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/vm/slub.txt b/Documentation/vm/slub.txt
index f464f47bc60..6752870c497 100644
--- a/Documentation/vm/slub.txt
+++ b/Documentation/vm/slub.txt
@@ -117,7 +117,7 @@ can be influenced by kernel parameters:
slub_min_objects=x (default 4)
slub_min_order=x (default 0)
-slub_max_order=x (default 1)
+slub_max_order=x (default 3 (PAGE_ALLOC_COSTLY_ORDER))
slub_min_objects allows to specify how many objects must at least fit
into one slab in order for the allocation order to be acceptable.
@@ -131,7 +131,10 @@ slub_min_objects.
slub_max_order specified the order at which slub_min_objects should no
longer be checked. This is useful to avoid SLUB trying to generate
super large order pages to fit slub_min_objects of a slab cache with
-large object sizes into one high order page.
+large object sizes into one high order page. Setting command line
+parameter debug_guardpage_minorder=N (N > 0), forces setting
+slub_max_order to 0, what cause minimum possible order of slabs
+allocation.
SLUB Debug output
-----------------