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slab, slub, slob: add slab_flags_t
Add sparse-checked slab_flags_t for struct kmem_cache::flags (SLAB_POISON, etc). SLAB is bloated temporarily by switching to "unsigned long", but only temporarily. Link: http://lkml.kernel.org/r/20171021100225.GA22428@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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15 changed files with 97 additions and 81 deletions
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@ -21,13 +21,20 @@
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* Flags to pass to kmem_cache_create().
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* The ones marked DEBUG are only valid if CONFIG_DEBUG_SLAB is set.
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*/
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#define SLAB_CONSISTENCY_CHECKS 0x00000100UL /* DEBUG: Perform (expensive) checks on alloc/free */
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#define SLAB_RED_ZONE 0x00000400UL /* DEBUG: Red zone objs in a cache */
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#define SLAB_POISON 0x00000800UL /* DEBUG: Poison objects */
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#define SLAB_HWCACHE_ALIGN 0x00002000UL /* Align objs on cache lines */
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#define SLAB_CACHE_DMA 0x00004000UL /* Use GFP_DMA memory */
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#define SLAB_STORE_USER 0x00010000UL /* DEBUG: Store the last owner for bug hunting */
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#define SLAB_PANIC 0x00040000UL /* Panic if kmem_cache_create() fails */
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/* DEBUG: Perform (expensive) checks on alloc/free */
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#define SLAB_CONSISTENCY_CHECKS ((slab_flags_t __force)0x00000100UL)
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/* DEBUG: Red zone objs in a cache */
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#define SLAB_RED_ZONE ((slab_flags_t __force)0x00000400UL)
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/* DEBUG: Poison objects */
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#define SLAB_POISON ((slab_flags_t __force)0x00000800UL)
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/* Align objs on cache lines */
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#define SLAB_HWCACHE_ALIGN ((slab_flags_t __force)0x00002000UL)
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/* Use GFP_DMA memory */
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#define SLAB_CACHE_DMA ((slab_flags_t __force)0x00004000UL)
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/* DEBUG: Store the last owner for bug hunting */
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#define SLAB_STORE_USER ((slab_flags_t __force)0x00010000UL)
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/* Panic if kmem_cache_create() fails */
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#define SLAB_PANIC ((slab_flags_t __force)0x00040000UL)
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/*
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* SLAB_TYPESAFE_BY_RCU - **WARNING** READ THIS!
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*
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@ -65,44 +72,51 @@
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*
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* Note that SLAB_TYPESAFE_BY_RCU was originally named SLAB_DESTROY_BY_RCU.
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*/
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#define SLAB_TYPESAFE_BY_RCU 0x00080000UL /* Defer freeing slabs to RCU */
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#define SLAB_MEM_SPREAD 0x00100000UL /* Spread some memory over cpuset */
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#define SLAB_TRACE 0x00200000UL /* Trace allocations and frees */
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/* Defer freeing slabs to RCU */
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#define SLAB_TYPESAFE_BY_RCU ((slab_flags_t __force)0x00080000UL)
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/* Spread some memory over cpuset */
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#define SLAB_MEM_SPREAD ((slab_flags_t __force)0x00100000UL)
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/* Trace allocations and frees */
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#define SLAB_TRACE ((slab_flags_t __force)0x00200000UL)
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/* Flag to prevent checks on free */
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#ifdef CONFIG_DEBUG_OBJECTS
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# define SLAB_DEBUG_OBJECTS 0x00400000UL
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# define SLAB_DEBUG_OBJECTS ((slab_flags_t __force)0x00400000UL)
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#else
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# define SLAB_DEBUG_OBJECTS 0x00000000UL
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# define SLAB_DEBUG_OBJECTS ((slab_flags_t __force)0x00000000UL)
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#endif
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#define SLAB_NOLEAKTRACE 0x00800000UL /* Avoid kmemleak tracing */
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/* Avoid kmemleak tracing */
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#define SLAB_NOLEAKTRACE ((slab_flags_t __force)0x00800000UL)
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/* Don't track use of uninitialized memory */
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#ifdef CONFIG_KMEMCHECK
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# define SLAB_NOTRACK 0x01000000UL
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# define SLAB_NOTRACK ((slab_flags_t __force)0x01000000UL)
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#else
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# define SLAB_NOTRACK 0x00000000UL
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# define SLAB_NOTRACK ((slab_flags_t __force)0x00000000UL)
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#endif
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/* Fault injection mark */
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#ifdef CONFIG_FAILSLAB
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# define SLAB_FAILSLAB 0x02000000UL /* Fault injection mark */
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# define SLAB_FAILSLAB ((slab_flags_t __force)0x02000000UL)
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#else
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# define SLAB_FAILSLAB 0x00000000UL
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# define SLAB_FAILSLAB ((slab_flags_t __force)0x00000000UL)
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#endif
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/* Account to memcg */
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#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
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# define SLAB_ACCOUNT 0x04000000UL /* Account to memcg */
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# define SLAB_ACCOUNT ((slab_flags_t __force)0x04000000UL)
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#else
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# define SLAB_ACCOUNT 0x00000000UL
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# define SLAB_ACCOUNT ((slab_flags_t __force)0x00000000UL)
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#endif
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#ifdef CONFIG_KASAN
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#define SLAB_KASAN 0x08000000UL
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#define SLAB_KASAN ((slab_flags_t __force)0x08000000UL)
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#else
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#define SLAB_KASAN 0x00000000UL
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#define SLAB_KASAN ((slab_flags_t __force)0x00000000UL)
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#endif
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/* The following flags affect the page allocator grouping pages by mobility */
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#define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* Objects are reclaimable */
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/* Objects are reclaimable */
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#define SLAB_RECLAIM_ACCOUNT ((slab_flags_t __force)0x00020000UL)
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#define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */
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/*
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* ZERO_SIZE_PTR will be returned for zero sized kmalloc requests.
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@ -128,7 +142,7 @@ void __init kmem_cache_init(void);
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bool slab_is_available(void);
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struct kmem_cache *kmem_cache_create(const char *, size_t, size_t,
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unsigned long,
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slab_flags_t,
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void (*)(void *));
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void kmem_cache_destroy(struct kmem_cache *);
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int kmem_cache_shrink(struct kmem_cache *);
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