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authorChristoph Lameter <clameter@sgi.com>2007-05-31 00:40:47 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-31 07:58:13 -0700
commitc1aee215d760175601b820bd1e2f0364e844ff8c (patch)
treeafbbbe64b57552fa55a0ee95b01922f64ecec0a1 /Documentation/kernel-parameters.txt
parent9af20376ee65cd2d13f7eb587fab70879d8c355b (diff)
SLUB: More documentation
Update documentation to describe how to read a SLUB error report. Add slub parameters to Documentation/kernel-parameters. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt37
1 files changed, 34 insertions, 3 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index aae2282600c..ce91560229f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1132,9 +1132,9 @@ and is between 256 and 4096 characters. It is defined in the file
when set.
Format: <int>
- noaliencache [MM, NUMA] Disables the allcoation of alien caches in
- the slab allocator. Saves per-node memory, but will
- impact performance on real NUMA hardware.
+ noaliencache [MM, NUMA, SLAB] Disables the allocation of alien
+ caches in the slab allocator. Saves per-node memory,
+ but will impact performance.
noalign [KNL,ARM]
@@ -1613,6 +1613,37 @@ and is between 256 and 4096 characters. It is defined in the file
slram= [HW,MTD]
+ slub_debug [MM, SLUB]
+ Enabling slub_debug allows one to determine the culprit
+ if slab objects become corrupted. Enabling slub_debug
+ creates guard zones around objects and poisons objects
+ when not in use. Also tracks the last alloc / free.
+ For more information see Documentation/vm/slub.txt.
+
+ slub_max_order= [MM, SLUB]
+ Determines the maximum allowed order for slabs. Setting
+ this too high may cause fragmentation.
+ For more information see Documentation/vm/slub.txt.
+
+ slub_min_objects= [MM, SLUB]
+ The minimum objects per slab. SLUB will increase the
+ slab order up to slub_max_order to generate a
+ sufficiently big slab to satisfy the number of objects.
+ The higher the number of objects the smaller the overhead
+ of tracking slabs.
+ For more information see Documentation/vm/slub.txt.
+
+ slub_min_order= [MM, SLUB]
+ Determines the mininum page order for slabs. Must be
+ lower than slub_max_order
+ For more information see Documentation/vm/slub.txt.
+
+ slub_nomerge [MM, SLUB]
+ Disable merging of slabs of similar size. May be
+ necessary if there is some reason to distinguish
+ allocs to different slabs.
+ For more information see Documentation/vm/slub.txt.
+
smart2= [HW]
Format: <io1>[,<io2>[,...,<io8>]]