bcee6e2a13
The header format is highly similar between slab and slub. The main difference lays in the fact that slab may optionally have statistics added here in case of CONFIG_SLAB_DEBUG, while the slub will stick them somewhere else. By making sure that information conditionally lives inside a globally-visible CONFIG_DEBUG_SLAB switch, we can move the header printing to a common location. Signed-off-by: Glauber Costa <glommer@parallels.com> Acked-by: Christoph Lameter <cl@linux.com> CC: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
#ifndef MM_SLAB_H
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#define MM_SLAB_H
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/*
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* Internal slab definitions
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*/
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/*
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* State of the slab allocator.
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*
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* This is used to describe the states of the allocator during bootup.
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* Allocators use this to gradually bootstrap themselves. Most allocators
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* have the problem that the structures used for managing slab caches are
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* allocated from slab caches themselves.
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*/
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enum slab_state {
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DOWN, /* No slab functionality yet */
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PARTIAL, /* SLUB: kmem_cache_node available */
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PARTIAL_ARRAYCACHE, /* SLAB: kmalloc size for arraycache available */
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PARTIAL_L3, /* SLAB: kmalloc size for l3 struct available */
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UP, /* Slab caches usable but not all extras yet */
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FULL /* Everything is working */
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};
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extern enum slab_state slab_state;
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/* The slab cache mutex protects the management structures during changes */
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extern struct mutex slab_mutex;
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/* The list of all slab caches on the system */
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extern struct list_head slab_caches;
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/* The slab cache that manages slab cache information */
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extern struct kmem_cache *kmem_cache;
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/* Functions provided by the slab allocators */
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extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
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#ifdef CONFIG_SLUB
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struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
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size_t align, unsigned long flags, void (*ctor)(void *));
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#else
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static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
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size_t align, unsigned long flags, void (*ctor)(void *))
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{ return NULL; }
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#endif
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int __kmem_cache_shutdown(struct kmem_cache *);
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struct seq_file;
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struct file;
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int slabinfo_show(struct seq_file *m, void *p);
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ssize_t slabinfo_write(struct file *file, const char __user *buffer,
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size_t count, loff_t *ppos);
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#endif
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