The patch titled
Subject: slub: document setting min order with debug_guardpage_minorder > 0
has been added to the -mm tree. Its filename is
slub-document-setting-min-order-with-debug_guardpage_minorder-0.patch
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------------------------------------------------------
From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Subject: slub: document setting min order with debug_guardpage_minorder > 0
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/ABI/testing/sysfs-kernel-slab | 4 ++++
Documentation/vm/slub.txt | 5 ++++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff -puN Documentation/ABI/testing/sysfs-kernel-slab~slub-document-setting-min-order-with-debug_guardpage_minorder-0 Documentation/ABI/testing/sysfs-kernel-slab
--- a/Documentation/ABI/testing/sysfs-kernel-slab~slub-document-setting-min-order-with-debug_guardpage_minorder-0
+++ a/Documentation/ABI/testing/sysfs-kernel-slab
@@ -346,6 +346,10 @@ Description:
number of objects per slab. If a slab cannot be allocated
because of fragmentation, SLUB will retry with the minimum order
possible depending on its characteristics.
+ When debug_guardpage_minorder=N (N > 0) parameter is specified
+ (see Documentation/kernel-parameters.txt), the minimum possible
+ order is used and this sysfs entry can not be used to change
+ the order at run time.
What: /sys/kernel/slab/cache/order_fallback
Date: April 2008
diff -puN Documentation/vm/slub.txt~slub-document-setting-min-order-with-debug_guardpage_minorder-0 Documentation/vm/slub.txt
--- a/Documentation/vm/slub.txt~slub-document-setting-min-order-with-debug_guardpage_minorder-0
+++ a/Documentation/vm/slub.txt
@@ -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
-----------------
_
Subject: Subject: slub: document setting min order with debug_guardpage_minorder > 0
Patches currently in -mm which might be from sgruszka@xxxxxxxxxx are
origin.patch
linux-next.patch
slub-document-setting-min-order-with-debug_guardpage_minorder-0.patch
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