mirror of
https://github.com/torvalds/linux.git
synced 2024-11-21 19:41:42 +00:00
mm/slab: remove mm/slab.c and slab_def.h
Remove the SLAB implementation. Update CREDITS. Also update and properly sort the SLOB entry there. RIP SLAB allocator (1996 - 2024) Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Christoph Lameter <cl@linux.com> Acked-by: David Rientjes <rientjes@google.com> Tested-by: David Rientjes <rientjes@google.com> Acked-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Vlastimil Babka
parent
8c20b29db5
commit
16a1d96835
12
CREDITS
12
CREDITS
@ -9,10 +9,6 @@
|
||||
Linus
|
||||
----------
|
||||
|
||||
N: Matt Mackal
|
||||
E: mpm@selenic.com
|
||||
D: SLOB slab allocator
|
||||
|
||||
N: Matti Aarnio
|
||||
E: mea@nic.funet.fi
|
||||
D: Alpha systems hacking, IPv6 and other network related stuff
|
||||
@ -1572,6 +1568,10 @@ S: Ampferstr. 50 / 4
|
||||
S: 6020 Innsbruck
|
||||
S: Austria
|
||||
|
||||
N: Mark Hemment
|
||||
E: markhe@nextd.demon.co.uk
|
||||
D: SLAB allocator implementation
|
||||
|
||||
N: Richard Henderson
|
||||
E: rth@twiddle.net
|
||||
E: rth@cygnus.com
|
||||
@ -2437,6 +2437,10 @@ D: work on suspend-to-ram/disk, killing duplicates from ioctl32,
|
||||
D: Altera SoCFPGA and Nokia N900 support.
|
||||
S: Czech Republic
|
||||
|
||||
N: Olivia Mackall
|
||||
E: olivia@selenic.com
|
||||
D: SLOB slab allocator
|
||||
|
||||
N: Paul Mackerras
|
||||
E: paulus@samba.org
|
||||
D: PPP driver
|
||||
|
||||
@ -1,124 +0,0 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef _LINUX_SLAB_DEF_H
|
||||
#define _LINUX_SLAB_DEF_H
|
||||
|
||||
#include <linux/kfence.h>
|
||||
#include <linux/reciprocal_div.h>
|
||||
|
||||
/*
|
||||
* Definitions unique to the original Linux SLAB allocator.
|
||||
*/
|
||||
|
||||
struct kmem_cache {
|
||||
struct array_cache __percpu *cpu_cache;
|
||||
|
||||
/* 1) Cache tunables. Protected by slab_mutex */
|
||||
unsigned int batchcount;
|
||||
unsigned int limit;
|
||||
unsigned int shared;
|
||||
|
||||
unsigned int size;
|
||||
struct reciprocal_value reciprocal_buffer_size;
|
||||
/* 2) touched by every alloc & free from the backend */
|
||||
|
||||
slab_flags_t flags; /* constant flags */
|
||||
unsigned int num; /* # of objs per slab */
|
||||
|
||||
/* 3) cache_grow/shrink */
|
||||
/* order of pgs per slab (2^n) */
|
||||
unsigned int gfporder;
|
||||
|
||||
/* force GFP flags, e.g. GFP_DMA */
|
||||
gfp_t allocflags;
|
||||
|
||||
size_t colour; /* cache colouring range */
|
||||
unsigned int colour_off; /* colour offset */
|
||||
unsigned int freelist_size;
|
||||
|
||||
/* constructor func */
|
||||
void (*ctor)(void *obj);
|
||||
|
||||
/* 4) cache creation/removal */
|
||||
const char *name;
|
||||
struct list_head list;
|
||||
int refcount;
|
||||
int object_size;
|
||||
int align;
|
||||
|
||||
/* 5) statistics */
|
||||
#ifdef CONFIG_DEBUG_SLAB
|
||||
unsigned long num_active;
|
||||
unsigned long num_allocations;
|
||||
unsigned long high_mark;
|
||||
unsigned long grown;
|
||||
unsigned long reaped;
|
||||
unsigned long errors;
|
||||
unsigned long max_freeable;
|
||||
unsigned long node_allocs;
|
||||
unsigned long node_frees;
|
||||
unsigned long node_overflow;
|
||||
atomic_t allochit;
|
||||
atomic_t allocmiss;
|
||||
atomic_t freehit;
|
||||
atomic_t freemiss;
|
||||
|
||||
/*
|
||||
* If debugging is enabled, then the allocator can add additional
|
||||
* fields and/or padding to every object. 'size' contains the total
|
||||
* object size including these internal fields, while 'obj_offset'
|
||||
* and 'object_size' contain the offset to the user object and its
|
||||
* size.
|
||||
*/
|
||||
int obj_offset;
|
||||
#endif /* CONFIG_DEBUG_SLAB */
|
||||
|
||||
#ifdef CONFIG_KASAN_GENERIC
|
||||
struct kasan_cache kasan_info;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_SLAB_FREELIST_RANDOM
|
||||
unsigned int *random_seq;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_HARDENED_USERCOPY
|
||||
unsigned int useroffset; /* Usercopy region offset */
|
||||
unsigned int usersize; /* Usercopy region size */
|
||||
#endif
|
||||
|
||||
struct kmem_cache_node *node[MAX_NUMNODES];
|
||||
};
|
||||
|
||||
static inline void *nearest_obj(struct kmem_cache *cache, const struct slab *slab,
|
||||
void *x)
|
||||
{
|
||||
void *object = x - (x - slab->s_mem) % cache->size;
|
||||
void *last_object = slab->s_mem + (cache->num - 1) * cache->size;
|
||||
|
||||
if (unlikely(object > last_object))
|
||||
return last_object;
|
||||
else
|
||||
return object;
|
||||
}
|
||||
|
||||
/*
|
||||
* We want to avoid an expensive divide : (offset / cache->size)
|
||||
* Using the fact that size is a constant for a particular cache,
|
||||
* we can replace (offset / cache->size) by
|
||||
* reciprocal_divide(offset, cache->reciprocal_buffer_size)
|
||||
*/
|
||||
static inline unsigned int obj_to_index(const struct kmem_cache *cache,
|
||||
const struct slab *slab, void *obj)
|
||||
{
|
||||
u32 offset = (obj - slab->s_mem);
|
||||
return reciprocal_divide(offset, cache->reciprocal_buffer_size);
|
||||
}
|
||||
|
||||
static inline int objs_per_slab(const struct kmem_cache *cache,
|
||||
const struct slab *slab)
|
||||
{
|
||||
if (is_kfence_address(slab_address(slab)))
|
||||
return 1;
|
||||
return cache->num;
|
||||
}
|
||||
|
||||
#endif /* _LINUX_SLAB_DEF_H */
|
||||
Loading…
Reference in New Issue
Block a user