linux-toradex.git/mm/slab.c, branch v3.10.2

slab: fix init_lock_keys

2013-07-22T01:21:26+00:00

commit 0f8f8094d28eb53368ac09186ea6b3a324cc7d44 upstream.

Some architectures (e.g. powerpc built with CONFIG_PPC_256K_PAGES=y
CONFIG_FORCE_MAX_ZONEORDER=11) get PAGE_SHIFT + MAX_ORDER > 26.

In 3.10 kernels, CONFIG_LOCKDEP=y with PAGE_SHIFT + MAX_ORDER > 26 makes
init_lock_keys() dereference beyond kmalloc_caches[26].
This leads to an unbootable system (kernel panic at initializing SLAB)
if one of kmalloc_caches[26...PAGE_SHIFT+MAX_ORDER-1] is not NULL.

Fix this by making sure that init_lock_keys() does not dereference beyond
kmalloc_caches[26] arrays.

Signed-off-by: Christoph Lameter 
Reported-by: Tetsuo Handa 
Cc: Pekka Enberg 
Signed-off-by: Andrew Morton 
Signed-off-by: Pekka Enberg 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2013-05-07T15:42:20+00:00

Pull slab changes from Pekka Enberg:
 "The bulk of the changes are more slab unification from Christoph.

  There's also few fixes from Aaron, Glauber, and Joonsoo thrown into
  the mix."

* 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux: (24 commits)
  mm, slab_common: Fix bootstrap creation of kmalloc caches
  slab: Return NULL for oversized allocations
  mm: slab: Verify the nodeid passed to ____cache_alloc_node
  slub: tid must be retrieved from the percpu area of the current processor
  slub: Do not dereference NULL pointer in node_match
  slub: add 'likely' macro to inc_slabs_node()
  slub: correct to calculate num of acquired objects in get_partial_node()
  slub: correctly bootstrap boot caches
  mm/sl[au]b: correct allocation type check in kmalloc_slab()
  slab: Fixup CONFIG_PAGE_ALLOC/DEBUG_SLAB_LEAK sections
  slab: Handle ARCH_DMA_MINALIGN correctly
  slab: Common definition for kmem_cache_node
  slab: Rename list3/l3 to node
  slab: Common Kmalloc cache determination
  stat: Use size_t for sizes instead of unsigned
  slab: Common function to create the kmalloc array
  slab: Common definition for the array of kmalloc caches
  slab: Common constants for kmalloc boundaries
  slab: Rename nodelists to node
  slab: Common name for the per node structures
  ...

Merge branch 'slab/next' into slab/for-linus

2013-05-07T06:19:47+00:00

mm: slab: Verify the nodeid passed to ____cache_alloc_node

2013-05-01T07:57:43+00:00

If the nodeid is > num_online_nodes() this can cause an Oops and a
panic(). The purpose of this patch is to assert if this condition is
true to aid debugging efforts rather than some random NULL pointer
dereference or page fault.

This patch is in response to BZ#42967 [1].  Using VM_BUG_ON so it's used
only when CONFIG_DEBUG_VM is set, given that ____cache_alloc_node() is a
hot code path.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=42967

Signed-off-by: Aaron Tomlin 
Reviewed-by: Rik van Riel 
Acked-by: Christoph Lameter 
Acked-by: Rafael Aquini 
Acked-by: David Rientjes 
Signed-off-by: Pekka Enberg

mm: Convert print_symbol to %pSR

2013-04-29T13:24:33+00:00

Use the new vsprintf extension to avoid any possible
message interleaving.

Signed-off-by: Joe Perches 
Acked-by: Christoph Lameter 
Signed-off-by: Jiri Kosina

slab: Fixup CONFIG_PAGE_ALLOC/DEBUG_SLAB_LEAK sections

2013-02-06T18:36:14+00:00

Variables were not properly converted and the conversion caused
a naming conflict.

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

slab: Common definition for kmem_cache_node

2013-02-01T10:32:09+00:00

Put the definitions for the kmem_cache_node structures together so that
we have one structure. That will allow us to create more common fields in
the future which could yield more opportunities to share code.

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

slab: Rename list3/l3 to node

2013-02-01T10:32:09+00:00

The list3 or l3 pointers are pointing to per node structures. Reflect
that in the names of variables used.

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

slab: Common Kmalloc cache determination

2013-02-01T10:32:08+00:00

Extract the optimized lookup functions from slub and put them into
slab_common.c. Then make slab use these functions as well.

Joonsoo notes that this fixes some issues with constant folding which
also reduces the code size for slub.

https://lkml.org/lkml/2012/10/20/82

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

slab: Common function to create the kmalloc array

2013-02-01T10:32:08+00:00

The kmalloc array is created in similar ways in both SLAB
and SLUB. Create a common function and have both allocators
call that function.

V1->V2:
	Whitespace cleanup

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