linux-toradex.git/Documentation/vm/slub.txt, branch v4.9.88

slub: convert SLAB_DEBUG_FREE to SLAB_CONSISTENCY_CHECKS

2016-03-15T23:55:16+00:00

SLAB_DEBUG_FREE allows expensive consistency checks at free to be turned
on or off.  Expand its use to be able to turn off all consistency
checks.  This gives a nice speed up if you only want features such as
poisoning or tracing.

Credit to Mathias Krause for the original work which inspired this
series

Signed-off-by: Laura Abbott 
Acked-by: Christoph Lameter 
Cc: Pekka Enberg 
Cc: David Rientjes 
Cc: Joonsoo Kim 
Cc: Kees Cook 
Cc: Mathias Krause 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Doc: treewide: Fix grammar "a" to "an"

2015-12-10T18:36:40+00:00

This patch fix some grammar mistake.

Signed-off-by: Masanari Iida 
Signed-off-by: Jonathan Corbet

Documentation/vm/slub.txt: document slabinfo-gnuplot.sh

2015-11-03T01:15:33+00:00

Add documentation on how to use slabinfo-gnuplot.sh script.

Signed-off-by: Sergey Senozhatsky 
Acked-by: Christoph Lameter 
Signed-off-by: Jonathan Corbet

Documentations: Fix slabinfo.c directory in vm/slub.txt

2012-05-10T08:45:23+00:00

Because the place of slabinfo.c changed.So update in slub.txt.

Acked-by: Christoph Lameter 
Signed-off-by: majianpeng 
Signed-off-by: Pekka Enberg

slub: document setting min order with debug_guardpage_minorder > 0

2012-01-13T04:13:04+00:00

Acked-by: David Rientjes 
Cc: Pekka Enberg 
Cc: "Rafael J. Wysocki" 
Signed-off-by: Stanislaw Gruszka 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

slub: fix slub_max_order Documentation

2011-11-27T20:08:28+00:00

slub_max_order default is 3 (aka PAGE_ALLOC_COSTLY_ORDER), not 1

Acked-by: David Rientjes 
Acked-by: Christoph Lameter 
Signed-off-by: Eric Dumazet 
Signed-off-by: Pekka Enberg

doc: fix broken references

2011-09-27T16:08:04+00:00

There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.

Fix these broken references, sometimes by dropping the irrelevant text
they were part of.

Signed-off-by: Paul Bolle 
Signed-off-by: Jiri Kosina

failslab: add ability to filter slab caches

2010-02-26T17:19:39+00:00

This patch allow to inject faults only for specific slabs.
In order to preserve default behavior cache filter is off by
default (all caches are faulty).

One may define specific set of slabs like this:
# mark skbuff_head_cache as faulty
echo 1 > /sys/kernel/slab/skbuff_head_cache/failslab
# Turn on cache filter (off by default)
echo 1 > /sys/kernel/debug/failslab/cache-filter
# Turn on fault injection
echo 1 > /sys/kernel/debug/failslab/times
echo 1 > /sys/kernel/debug/failslab/probability

Acked-by: David Rientjes 
Acked-by: Akinobu Mita 
Acked-by: Christoph Lameter 
Signed-off-by: Dmitry Monakhov 
Signed-off-by: Pekka Enberg

doc: Fix a typo in slub.txt.

2009-12-04T14:39:59+00:00

Signed-off-by: Justin P. Mattock 
Signed-off-by: Jiri Kosina

slub: add option to disable higher order debugging slabs

2009-07-10T06:52:55+00:00

When debugging is enabled, slub requires that additional metadata be
stored in slabs for certain options: SLAB_RED_ZONE, SLAB_POISON, and
SLAB_STORE_USER.

Consequently, it may require that the minimum possible slab order needed
to allocate a single object be greater when using these options.  The
most notable example is for objects that are PAGE_SIZE bytes in size.

Higher minimum slab orders may cause page allocation failures when oom or
under heavy fragmentation.

This patch adds a new slub_debug option, which disables debugging by
default for caches that would have resulted in higher minimum orders:

	slub_debug=O

When this option is used on systems with 4K pages, kmalloc-4096, for
example, will not have debugging enabled by default even if
CONFIG_SLUB_DEBUG_ON is defined because it would have resulted in a
order-1 minimum slab order.

Reported-by: Larry Finger 
Tested-by: Larry Finger 
Cc: Christoph Lameter 
Signed-off-by: David Rientjes 
Signed-off-by: Pekka Enberg