linux.git/Documentation/vm, branch v2.6.23

Document Linux Memory Policy

2007-08-23T02:52:44+00:00

I couldn't find any memory policy documentation in the Documentation
directory, so here is my attempt to document it.

There's lots more that could be written about the internal design--including
data structures, functions, etc.  However, if you agree that this is better
that the nothing that exists now, perhaps it could be merged.  This will
provide a baseline for updates to document the many policy patches that are
currently being worked.

Signed-off-by: Lee Schermerhorn 
Cc: Christoph Lameter 
Cc: Andi Kleen 
Cc: Michael Kerrisk 
Acked-by: Rob Landley 
Acked-by: Mel Gorman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SLUB: Fix format specifier in Documentation/vm/slabinfo.c

2007-08-10T04:57:16+00:00

There's a little problem in Documentation/vm/slabinfo.c
The code is using "%d" in a printf() call to print an 'unsigned long'.
This patch corrects it to use "%lu" instead.

Signed-off-by: Jesper Juhl 
Signed-off-by: Christoph Lameter

SLUB: change error reporting format to follow lockdep loosely

2007-07-17T17:23:01+00:00

Changes the error reporting format to loosely follow lockdep.

If data corruption is detected then we generate the following lines:

============================================
BUG : 
--------------------------------------------

INFO:  [possibly multiple times]



FIX : 

This also adds some more intelligence to the data corruption detection. Its
now capable of figuring out the start and end.

Add a comment on how to configure SLUB so that a production system may
continue to operate even though occasional slab corruption occur through
a misbehaving kernel component. See "Emergency operations" in
Documentation/vm/slub.txt.

[akpm@linux-foundation.org: build fix]
Signed-off-by: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hugetlbfs: use lib/parser, fix docs

2007-07-16T16:05:46+00:00

Use lib/parser.c to parse hugetlbfs mount options.  Correct docs in
hugetlbpage.txt.

old size of hugetlbfs_fill_super:  675 bytes
new size of hugetlbfs_fill_super:  686 bytes
(hugetlbfs_parse_options() is inlined)

Signed-off-by: Randy Dunlap 
Cc: Hugh Dickins 
Cc: David Gibson 
Cc: Adam Litke 
Acked-by: William Lee Irwin III 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SLUB: support slub_debug on by default

2007-07-16T16:05:36+00:00

Add a new configuration variable

CONFIG_SLUB_DEBUG_ON

If set then the kernel will be booted by default with slab debugging
switched on. Similar to CONFIG_SLAB_DEBUG. By default slab debugging
is available but must be enabled by specifying "slub_debug" as a
kernel parameter.

Also add support to switch off slab debugging for a kernel that was
built with CONFIG_SLUB_DEBUG_ON. This works by specifying

slub_debug=-

as a kernel parameter.

Dave Jones wanted this feature.
http://marc.info/?l=linux-kernel&m=118072189913045&w=2

[akpm@linux-foundation.org: clean up switch statement]
Signed-off-by: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SLUB: More documentation

2007-05-31T14:58:13+00:00

Update documentation to describe how to read a SLUB error report.
Add slub parameters to Documentation/kernel-parameters.

Signed-off-by: Christoph Lameter 
Cc: "Randy.Dunlap" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

slub: another slabinfo fix

2007-05-18T15:17:17+00:00

The slab manipulation functions should not be triggered by slabs that
are unresovable in the subset of slabs selected on the command line.

Signed-off-by: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SLUB: slabinfo fixes

2007-05-17T12:23:03+00:00

Align the output of % with K/M/G of sizes.

Check for empty NUMA information to avoid segfault on !NUMA.

-r should work directly not only if we match a single slab
   without additional options.

Signed-off-by: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SLUB: slabinfo upgrade

2007-05-09T19:30:44+00:00

-e Show empty slabs
-d Modification of slab debug options at runtime
-o Operations. Display of ctor / dtor etc.
-r Report: Display all available information about a slabcache.

Cleanup tracking display and make it work right.

Signed-off-by: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

slub: add slabinfo tool

2007-05-07T19:12:54+00:00

Add the tool which gets reports about slabs to the VM documentation directory.

Signed-off-by: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds