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SLUB: More documentation

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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>
This commit is contained in:
Christoph Lameter
2007-05-31 00:40:47 -07:00
committed by Linus Torvalds
parent 9af20376ee
commit c1aee215d7
2 changed files with 157 additions and 13 deletions
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37
Documentation/kernel-parameters.txt
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@ -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>]]