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| author | Christoph Lameter <cl@linux.com> | 2012-06-13 19:24:57 +0400 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2012-06-14 10:20:16 +0400 |
| commit | 3b0efdfa1e719303536c04d9abca43abeb40f80a (patch) | |
| tree | 6a429eebb3febe5cc2101615ec7c7ea4d10fd97b /include/linux/slab_def.h | |
| parent | 350260889b251821e770573dfd65cd851b4ef781 (diff) | |
| download | linux-3b0efdfa1e719303536c04d9abca43abeb40f80a.tar.xz | |
mm, sl[aou]b: Extract common fields from struct kmem_cache
Define a struct that describes common fields used in all slab allocators.
A slab allocator either uses the common definition (like SLOB) or is
required to provide members of kmem_cache with the definition given.
After that it will be possible to share code that
only operates on those fields of kmem_cache.
The patch basically takes the slob definition of kmem cache and
uses the field namees for the other allocators.
It also standardizes the names used for basic object lengths in
allocators:
object_size Struct size specified at kmem_cache_create. Basically
the payload expected to be used by the subsystem.
size The size of memory allocator for each object. This size
is larger than object_size and includes padding, alignment
and extra metadata for each object (f.e. for debugging
and rcu).
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include/linux/slab_def.h')
| -rw-r--r-- | include/linux/slab_def.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h index fbd1117fdfde..1d93f27d81de 100644 --- a/include/linux/slab_def.h +++ b/include/linux/slab_def.h @@ -27,7 +27,7 @@ struct kmem_cache { unsigned int limit; unsigned int shared; - unsigned int buffer_size; + unsigned int size; u32 reciprocal_buffer_size; /* 2) touched by every alloc & free from the backend */ @@ -52,7 +52,10 @@ struct kmem_cache { /* 4) cache creation/removal */ const char *name; - struct list_head next; + struct list_head list; + int refcount; + int object_size; + int align; /* 5) statistics */ #ifdef CONFIG_DEBUG_SLAB @@ -73,12 +76,11 @@ struct kmem_cache { /* * If debugging is enabled, then the allocator can add additional - * fields and/or padding to every object. buffer_size contains the total + * fields and/or padding to every object. size contains the total * object size including these internal fields, the following two * variables contain the offset to the user object and its size. */ int obj_offset; - int obj_size; #endif /* CONFIG_DEBUG_SLAB */ /* 6) per-cpu/per-node data, touched during every alloc/free */ |