linux-stable.git/include/linux/slab_def.h, branch v3.13.2

Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2013-11-22T16:10:34+00:00

Pull SLAB changes from Pekka Enberg:
 "The patches from Joonsoo Kim switch mm/slab.c to use 'struct page' for
  slab internals similar to mm/slub.c.  This reduces memory usage and
  improves performance:

    https://lkml.org/lkml/2013/10/16/155

  Rest of the changes are bug fixes from various people"

* 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux: (21 commits)
  mm, slub: fix the typo in mm/slub.c
  mm, slub: fix the typo in include/linux/slub_def.h
  slub: Handle NULL parameter in kmem_cache_flags
  slab: replace non-existing 'struct freelist *' with 'void *'
  slab: fix to calm down kmemleak warning
  slub: proper kmemleak tracking if CONFIG_SLUB_DEBUG disabled
  slab: rename slab_bufctl to slab_freelist
  slab: remove useless statement for checking pfmemalloc
  slab: use struct page for slab management
  slab: replace free and inuse in struct slab with newly introduced active
  slab: remove SLAB_LIMIT
  slab: remove kmem_bufctl_t
  slab: change the management method of free objects of the slab
  slab: use __GFP_COMP flag for allocating slab pages
  slab: use well-defined macro, virt_to_slab()
  slab: overloading the RCU head over the LRU for RCU free
  slab: remove cachep in struct slab_rcu
  slab: remove nodeid in struct slab
  slab: remove colouroff in struct slab
  slab: change return type of kmem_getpages() to struct page
  ...

slab: use struct page for slab management

2013-10-24T17:17:34+00:00

Now, there are a few field in struct slab, so we can overload these
over struct page. This will save some memory and reduce cache footprint.

After this change, slabp_cache and slab_size no longer related to
a struct slab, so rename them as freelist_cache and freelist_size.

These changes are just mechanical ones and there is no functional change.

Acked-by: Andi Kleen 
Acked-by: Christoph Lameter 
Signed-off-by: Joonsoo Kim 
Signed-off-by: Pekka Enberg

mm/sl[aou]b: Move kmallocXXX functions to common code

2013-09-04T17:51:33+00:00

The kmalloc* functions of all slab allcoators are similar now so
lets move them into slab.h. This requires some function naming changes
in slob.

As a results of this patch there is a common set of functions for
all allocators. Also means that kmalloc_large() is now available
in general to perform large order allocations that go directly
via the page allocator. kmalloc_large() can be substituted if
kmalloc() throws warnings because of too large allocations.

kmalloc_large() has exactly the same semantics as kmalloc but
can only used for allocations > PAGE_SIZE.

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

slab: Return NULL for oversized allocations

2013-05-06T06:24:16+00:00

The inline path seems to have changed the SLAB behavior for very large
kmalloc allocations with  commit e3366016 ("slab: Use common
kmalloc_index/kmalloc_size functions"). This patch restores the old
behavior but also adds diagnostics so that we can figure where in the
code these large allocations occur.

Reported-and-tested-by: Tetsuo Handa 
Signed-off-by: Christoph Lameter 
Link: http://lkml.kernel.org/r/201305040348.CIF81716.OStQOHFJMFLOVF@I-love.SAKURA.ne.jp
[ penberg@kernel.org: use WARN_ON_ONCE ]
Signed-off-by: Pekka Enberg

slab: Common definition for the array of kmalloc caches

2013-02-01T10:32:07+00:00

Have a common definition fo the kmalloc cache arrays in
SLAB and SLUB

Acked-by: Glauber Costa 
Signed-off-by: Christoph Lameter 
Signed-off-by: Pekka Enberg

slab: Rename nodelists to node

2013-02-01T10:32:06+00:00

Have a common naming between both slab caches for future changes.

Acked-by: Glauber Costa 
Signed-off-by: Christoph Lameter 
Signed-off-by: Pekka Enberg

slab: Common name for the per node structures

2013-02-01T10:32:06+00:00

Rename the structure used for the per node structures in slab
to have a name that expresses that fact.

Acked-by: Glauber Costa 
Signed-off-by: Christoph Lameter 
Signed-off-by: Pekka Enberg

slab: Use common kmalloc_index/kmalloc_size functions

2013-02-01T10:32:06+00:00

Make slab use the common functions. We can get rid of a lot
of old ugly stuff as a results. Among them the sizes
array and the weird include/linux/kmalloc_sizes file and
some pretty bad #include statements in slab_def.h.

The one thing that is different in slab is that the 32 byte
cache will also be created for arches that have page sizes
larger than 4K. There are numerous smaller allocations that
SLOB and SLUB can handle better because of their support for
smaller allocation sizes so lets keep the 32 byte slab also
for arches with > 4K pages.

Reviewed-by: Glauber Costa 
Signed-off-by: Christoph Lameter 
Signed-off-by: Pekka Enberg

slab/slub: struct memcg_params

2012-12-18T23:02:13+00:00

For the kmem slab controller, we need to record some extra information in
the kmem_cache structure.

Signed-off-by: Glauber Costa 
Signed-off-by: Suleiman Souhlal 
Cc: Christoph Lameter 
Cc: David Rientjes 
Cc: Frederic Weisbecker 
Cc: Greg Thelen 
Cc: Johannes Weiner 
Cc: JoonSoo Kim 
Cc: KAMEZAWA Hiroyuki 
Cc: Mel Gorman 
Cc: Michal Hocko 
Cc: Pekka Enberg 
Cc: Rik van Riel 
Cc: Tejun Heo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

slab: Simplify bootstrap

2012-12-11T10:14:27+00:00

The nodelists field in kmem_cache is pointing to the first unused
object in the array field when bootstrap is complete.

A problem with the current approach is that the statically sized
kmem_cache structure use on boot can only contain NR_CPUS entries.
If the number of nodes plus the number of cpus is greater then we
would overwrite memory following the kmem_cache_boot definition.

Increase the size of the array field to ensure that also the node
pointers fit into the array field.

Once we do that we no longer need the kmem_cache_nodelists
array and we can then also use that structure elsewhere.

Acked-by: Glauber Costa 
Signed-off-by: Christoph Lameter 
Signed-off-by: Pekka Enberg