mirror of https://gitee.com/openkylin/linux.git
Merge branches 'topic/slob/cleanups', 'topic/slob/fixes', 'topic/slub/core', 'topic/slub/cleanups' and 'topic/slub/perf' into for-linus
This commit is contained in:
Pekka Enberg
commit
15a5b0a491
|
|
@ -46,7 +46,6 @@ struct kmem_cache_cpu {
|
|||
struct kmem_cache_node {
|
||||
spinlock_t list_lock; /* Protect partial list and nr_partial */
|
||||
unsigned long nr_partial;
|
||||
unsigned long min_partial;
|
||||
struct list_head partial;
|
||||
#ifdef CONFIG_SLUB_DEBUG
|
||||
atomic_long_t nr_slabs;
|
||||
|
|
@ -89,6 +88,7 @@ struct kmem_cache {
|
|||
void (*ctor)(void *);
|
||||
int inuse; /* Offset to metadata */
|
||||
int align; /* Alignment */
|
||||
unsigned long min_partial;
|
||||
const char *name; /* Name (only for display!) */
|
||||
struct list_head list; /* List of slab caches */
|
||||
#ifdef CONFIG_SLUB_DEBUG
|
||||
|
|
@ -120,11 +120,24 @@ struct kmem_cache {
|
|||
|
||||
#define KMALLOC_SHIFT_LOW ilog2(KMALLOC_MIN_SIZE)
|
||||
|
||||
/*
|
||||
* Maximum kmalloc object size handled by SLUB. Larger object allocations
|
||||
* are passed through to the page allocator. The page allocator "fastpath"
|
||||
* is relatively slow so we need this value sufficiently high so that
|
||||
* performance critical objects are allocated through the SLUB fastpath.
|
||||
*
|
||||
* This should be dropped to PAGE_SIZE / 2 once the page allocator
|
||||
* "fastpath" becomes competitive with the slab allocator fastpaths.
|
||||
*/
|
||||
#define SLUB_MAX_SIZE (2 * PAGE_SIZE)
|
||||
|
||||
#define SLUB_PAGE_SHIFT (PAGE_SHIFT + 2)
|
||||
|
||||
/*
|
||||
* We keep the general caches in an array of slab caches that are used for
|
||||
* 2^x bytes of allocations.
|
||||
*/
|
||||
extern struct kmem_cache kmalloc_caches[PAGE_SHIFT + 1];
|
||||
extern struct kmem_cache kmalloc_caches[SLUB_PAGE_SHIFT];
|
||||
|
||||
/*
|
||||
* Sorry that the following has to be that ugly but some versions of GCC
|
||||
|
|
@ -212,7 +225,7 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
|
|||
static __always_inline void *kmalloc(size_t size, gfp_t flags)
|
||||
{
|
||||
if (__builtin_constant_p(size)) {
|
||||
if (size > PAGE_SIZE)
|
||||
if (size > SLUB_MAX_SIZE)
|
||||
return kmalloc_large(size, flags);
|
||||
|
||||
if (!(flags & SLUB_DMA)) {
|
||||
|
|
@ -234,7 +247,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
|
|||
static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
|
||||
{
|
||||
if (__builtin_constant_p(size) &&
|
||||
size <= PAGE_SIZE && !(flags & SLUB_DMA)) {
|
||||
size <= SLUB_MAX_SIZE && !(flags & SLUB_DMA)) {
|
||||
struct kmem_cache *s = kmalloc_slab(size);
|
||||
|
||||
if (!s)
|
||||
|
|
|
|||
43
mm/slob.c
43
mm/slob.c
|
|
@ -126,9 +126,9 @@ static LIST_HEAD(free_slob_medium);
|
|||
static LIST_HEAD(free_slob_large);
|
||||
|
||||
/*
|
||||
* slob_page: True for all slob pages (false for bigblock pages)
|
||||
* is_slob_page: True for all slob pages (false for bigblock pages)
|
||||
*/
|
||||
static inline int slob_page(struct slob_page *sp)
|
||||
static inline int is_slob_page(struct slob_page *sp)
|
||||
{
|
||||
return PageSlobPage((struct page *)sp);
|
||||
}
|
||||
|
|
@ -143,6 +143,11 @@ static inline void clear_slob_page(struct slob_page *sp)
|
|||
__ClearPageSlobPage((struct page *)sp);
|
||||
}
|
||||
|
||||
static inline struct slob_page *slob_page(const void *addr)
|
||||
{
|
||||
return (struct slob_page *)virt_to_page(addr);
|
||||
}
|
||||
|
||||
/*
|
||||
* slob_page_free: true for pages on free_slob_pages list.
|
||||
*/
|
||||
|
|
@ -230,7 +235,7 @@ static int slob_last(slob_t *s)
|
|||
return !((unsigned long)slob_next(s) & ~PAGE_MASK);
|
||||
}
|
||||
|
||||
static void *slob_new_page(gfp_t gfp, int order, int node)
|
||||
static void *slob_new_pages(gfp_t gfp, int order, int node)
|
||||
{
|
||||
void *page;
|
||||
|
||||
|
|
@ -247,12 +252,17 @@ static void *slob_new_page(gfp_t gfp, int order, int node)
|
|||
return page_address(page);
|
||||
}
|
||||
|
||||
static void slob_free_pages(void *b, int order)
|
||||
{
|
||||
free_pages((unsigned long)b, order);
|
||||
}
|
||||
|
||||
/*
|
||||
* Allocate a slob block within a given slob_page sp.
|
||||
*/
|
||||
static void *slob_page_alloc(struct slob_page *sp, size_t size, int align)
|
||||
{
|
||||
slob_t *prev, *cur, *aligned = 0;
|
||||
slob_t *prev, *cur, *aligned = NULL;
|
||||
int delta = 0, units = SLOB_UNITS(size);
|
||||
|
||||
for (prev = NULL, cur = sp->free; ; prev = cur, cur = slob_next(cur)) {
|
||||
|
|
@ -349,10 +359,10 @@ static void *slob_alloc(size_t size, gfp_t gfp, int align, int node)
|
|||
|
||||
/* Not enough space: must allocate a new page */
|
||||
if (!b) {
|
||||
b = slob_new_page(gfp & ~__GFP_ZERO, 0, node);
|
||||
b = slob_new_pages(gfp & ~__GFP_ZERO, 0, node);
|
||||
if (!b)
|
||||
return 0;
|
||||
sp = (struct slob_page *)virt_to_page(b);
|
||||
return NULL;
|
||||
sp = slob_page(b);
|
||||
set_slob_page(sp);
|
||||
|
||||
spin_lock_irqsave(&slob_lock, flags);
|
||||
|
|
@ -384,7 +394,7 @@ static void slob_free(void *block, int size)
|
|||
return;
|
||||
BUG_ON(!size);
|
||||
|
||||
sp = (struct slob_page *)virt_to_page(block);
|
||||
sp = slob_page(block);
|
||||
units = SLOB_UNITS(size);
|
||||
|
||||
spin_lock_irqsave(&slob_lock, flags);
|
||||
|
|
@ -393,10 +403,11 @@ static void slob_free(void *block, int size)
|
|||
/* Go directly to page allocator. Do not pass slob allocator */
|
||||
if (slob_page_free(sp))
|
||||
clear_slob_page_free(sp);
|
||||
spin_unlock_irqrestore(&slob_lock, flags);
|
||||
clear_slob_page(sp);
|
||||
free_slob_page(sp);
|
||||
free_page((unsigned long)b);
|
||||
goto out;
|
||||
return;
|
||||
}
|
||||
|
||||
if (!slob_page_free(sp)) {
|
||||
|
|
@ -476,7 +487,7 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
|
|||
} else {
|
||||
void *ret;
|
||||
|
||||
ret = slob_new_page(gfp | __GFP_COMP, get_order(size), node);
|
||||
ret = slob_new_pages(gfp | __GFP_COMP, get_order(size), node);
|
||||
if (ret) {
|
||||
struct page *page;
|
||||
page = virt_to_page(ret);
|
||||
|
|
@ -494,8 +505,8 @@ void kfree(const void *block)
|
|||
if (unlikely(ZERO_OR_NULL_PTR(block)))
|
||||
return;
|
||||
|
||||
sp = (struct slob_page *)virt_to_page(block);
|
||||
if (slob_page(sp)) {
|
||||
sp = slob_page(block);
|
||||
if (is_slob_page(sp)) {
|
||||
int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN);
|
||||
unsigned int *m = (unsigned int *)(block - align);
|
||||
slob_free(m, *m + align);
|
||||
|
|
@ -513,8 +524,8 @@ size_t ksize(const void *block)
|
|||
if (unlikely(block == ZERO_SIZE_PTR))
|
||||
return 0;
|
||||
|
||||
sp = (struct slob_page *)virt_to_page(block);
|
||||
if (slob_page(sp)) {
|
||||
sp = slob_page(block);
|
||||
if (is_slob_page(sp)) {
|
||||
int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN);
|
||||
unsigned int *m = (unsigned int *)(block - align);
|
||||
return SLOB_UNITS(*m) * SLOB_UNIT;
|
||||
|
|
@ -573,7 +584,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
|
|||
if (c->size < PAGE_SIZE)
|
||||
b = slob_alloc(c->size, flags, c->align, node);
|
||||
else
|
||||
b = slob_new_page(flags, get_order(c->size), node);
|
||||
b = slob_new_pages(flags, get_order(c->size), node);
|
||||
|
||||
if (c->ctor)
|
||||
c->ctor(b);
|
||||
|
|
@ -587,7 +598,7 @@ static void __kmem_cache_free(void *b, int size)
|
|||
if (size < PAGE_SIZE)
|
||||
slob_free(b, size);
|
||||
else
|
||||
free_pages((unsigned long)b, get_order(size));
|
||||
slob_free_pages(b, get_order(size));
|
||||
}
|
||||
|
||||
static void kmem_rcu_free(struct rcu_head *head)
|
||||
|
|
|
|||
82
mm/slub.c
82
mm/slub.c
|
|
@ -374,14 +374,8 @@ static struct track *get_track(struct kmem_cache *s, void *object,
|
|||
static void set_track(struct kmem_cache *s, void *object,
|
||||
enum track_item alloc, unsigned long addr)
|
||||
{
|
||||
struct track *p;
|
||||
struct track *p = get_track(s, object, alloc);
|
||||
|
||||
if (s->offset)
|
||||
p = object + s->offset + sizeof(void *);
|
||||
else
|
||||
p = object + s->inuse;
|
||||
|
||||
p += alloc;
|
||||
if (addr) {
|
||||
p->addr = addr;
|
||||
p->cpu = smp_processor_id();
|
||||
|
|
@ -1335,7 +1329,7 @@ static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags)
|
|||
n = get_node(s, zone_to_nid(zone));
|
||||
|
||||
if (n && cpuset_zone_allowed_hardwall(zone, flags) &&
|
||||
n->nr_partial > n->min_partial) {
|
||||
n->nr_partial > s->min_partial) {
|
||||
page = get_partial_node(n);
|
||||
if (page)
|
||||
return page;
|
||||
|
|
@ -1387,7 +1381,7 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
|
|||
slab_unlock(page);
|
||||
} else {
|
||||
stat(c, DEACTIVATE_EMPTY);
|
||||
if (n->nr_partial < n->min_partial) {
|
||||
if (n->nr_partial < s->min_partial) {
|
||||
/*
|
||||
* Adding an empty slab to the partial slabs in order
|
||||
* to avoid page allocator overhead. This slab needs
|
||||
|
|
@ -1724,7 +1718,7 @@ static __always_inline void slab_free(struct kmem_cache *s,
|
|||
c = get_cpu_slab(s, smp_processor_id());
|
||||
debug_check_no_locks_freed(object, c->objsize);
|
||||
if (!(s->flags & SLAB_DEBUG_OBJECTS))
|
||||
debug_check_no_obj_freed(object, s->objsize);
|
||||
debug_check_no_obj_freed(object, c->objsize);
|
||||
if (likely(page == c->page && c->node >= 0)) {
|
||||
object[c->offset] = c->freelist;
|
||||
c->freelist = object;
|
||||
|
|
@ -1844,6 +1838,7 @@ static inline int calculate_order(int size)
|
|||
int order;
|
||||
int min_objects;
|
||||
int fraction;
|
||||
int max_objects;
|
||||
|
||||
/*
|
||||
* Attempt to find best configuration for a slab. This
|
||||
|
|
@ -1856,6 +1851,9 @@ static inline int calculate_order(int size)
|
|||
min_objects = slub_min_objects;
|
||||
if (!min_objects)
|
||||
min_objects = 4 * (fls(nr_cpu_ids) + 1);
|
||||
max_objects = (PAGE_SIZE << slub_max_order)/size;
|
||||
min_objects = min(min_objects, max_objects);
|
||||
|
||||
while (min_objects > 1) {
|
||||
fraction = 16;
|
||||
while (fraction >= 4) {
|
||||
|
|
@ -1865,7 +1863,7 @@ static inline int calculate_order(int size)
|
|||
return order;
|
||||
fraction /= 2;
|
||||
}
|
||||
min_objects /= 2;
|
||||
min_objects --;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1928,17 +1926,6 @@ static void
|
|||
init_kmem_cache_node(struct kmem_cache_node *n, struct kmem_cache *s)
|
||||
{
|
||||
n->nr_partial = 0;
|
||||
|
||||
/*
|
||||
* The larger the object size is, the more pages we want on the partial
|
||||
* list to avoid pounding the page allocator excessively.
|
||||
*/
|
||||
n->min_partial = ilog2(s->size);
|
||||
if (n->min_partial < MIN_PARTIAL)
|
||||
n->min_partial = MIN_PARTIAL;
|
||||
else if (n->min_partial > MAX_PARTIAL)
|
||||
n->min_partial = MAX_PARTIAL;
|
||||
|
||||
spin_lock_init(&n->list_lock);
|
||||
INIT_LIST_HEAD(&n->partial);
|
||||
#ifdef CONFIG_SLUB_DEBUG
|
||||
|
|
@ -2181,6 +2168,15 @@ static int init_kmem_cache_nodes(struct kmem_cache *s, gfp_t gfpflags)
|
|||
}
|
||||
#endif
|
||||
|
||||
static void set_min_partial(struct kmem_cache *s, unsigned long min)
|
||||
{
|
||||
if (min < MIN_PARTIAL)
|
||||
min = MIN_PARTIAL;
|
||||
else if (min > MAX_PARTIAL)
|
||||
min = MAX_PARTIAL;
|
||||
s->min_partial = min;
|
||||
}
|
||||
|
||||
/*
|
||||
* calculate_sizes() determines the order and the distribution of data within
|
||||
* a slab object.
|
||||
|
|
@ -2319,6 +2315,11 @@ static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags,
|
|||
if (!calculate_sizes(s, -1))
|
||||
goto error;
|
||||
|
||||
/*
|
||||
* The larger the object size is, the more pages we want on the partial
|
||||
* list to avoid pounding the page allocator excessively.
|
||||
*/
|
||||
set_min_partial(s, ilog2(s->size));
|
||||
s->refcount = 1;
|
||||
#ifdef CONFIG_NUMA
|
||||
s->remote_node_defrag_ratio = 1000;
|
||||
|
|
@ -2475,7 +2476,7 @@ EXPORT_SYMBOL(kmem_cache_destroy);
|
|||
* Kmalloc subsystem
|
||||
*******************************************************************/
|
||||
|
||||
struct kmem_cache kmalloc_caches[PAGE_SHIFT + 1] __cacheline_aligned;
|
||||
struct kmem_cache kmalloc_caches[SLUB_PAGE_SHIFT] __cacheline_aligned;
|
||||
EXPORT_SYMBOL(kmalloc_caches);
|
||||
|
||||
static int __init setup_slub_min_order(char *str)
|
||||
|
|
@ -2537,7 +2538,7 @@ static struct kmem_cache *create_kmalloc_cache(struct kmem_cache *s,
|
|||
}
|
||||
|
||||
#ifdef CONFIG_ZONE_DMA
|
||||
static struct kmem_cache *kmalloc_caches_dma[PAGE_SHIFT + 1];
|
||||
static struct kmem_cache *kmalloc_caches_dma[SLUB_PAGE_SHIFT];
|
||||
|
||||
static void sysfs_add_func(struct work_struct *w)
|
||||
{
|
||||
|
|
@ -2658,7 +2659,7 @@ void *__kmalloc(size_t size, gfp_t flags)
|
|||
{
|
||||
struct kmem_cache *s;
|
||||
|
||||
if (unlikely(size > PAGE_SIZE))
|
||||
if (unlikely(size > SLUB_MAX_SIZE))
|
||||
return kmalloc_large(size, flags);
|
||||
|
||||
s = get_slab(size, flags);
|
||||
|
|
@ -2686,7 +2687,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)
|
|||
{
|
||||
struct kmem_cache *s;
|
||||
|
||||
if (unlikely(size > PAGE_SIZE))
|
||||
if (unlikely(size > SLUB_MAX_SIZE))
|
||||
return kmalloc_large_node(size, flags, node);
|
||||
|
||||
s = get_slab(size, flags);
|
||||
|
|
@ -2986,7 +2987,7 @@ void __init kmem_cache_init(void)
|
|||
caches++;
|
||||
}
|
||||
|
||||
for (i = KMALLOC_SHIFT_LOW; i <= PAGE_SHIFT; i++) {
|
||||
for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++) {
|
||||
create_kmalloc_cache(&kmalloc_caches[i],
|
||||
"kmalloc", 1 << i, GFP_KERNEL);
|
||||
caches++;
|
||||
|
|
@ -3023,7 +3024,7 @@ void __init kmem_cache_init(void)
|
|||
slab_state = UP;
|
||||
|
||||
/* Provide the correct kmalloc names now that the caches are up */
|
||||
for (i = KMALLOC_SHIFT_LOW; i <= PAGE_SHIFT; i++)
|
||||
for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++)
|
||||
kmalloc_caches[i]. name =
|
||||
kasprintf(GFP_KERNEL, "kmalloc-%d", 1 << i);
|
||||
|
||||
|
|
@ -3223,7 +3224,7 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
|
|||
{
|
||||
struct kmem_cache *s;
|
||||
|
||||
if (unlikely(size > PAGE_SIZE))
|
||||
if (unlikely(size > SLUB_MAX_SIZE))
|
||||
return kmalloc_large(size, gfpflags);
|
||||
|
||||
s = get_slab(size, gfpflags);
|
||||
|
|
@ -3239,7 +3240,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
|
|||
{
|
||||
struct kmem_cache *s;
|
||||
|
||||
if (unlikely(size > PAGE_SIZE))
|
||||
if (unlikely(size > SLUB_MAX_SIZE))
|
||||
return kmalloc_large_node(size, gfpflags, node);
|
||||
|
||||
s = get_slab(size, gfpflags);
|
||||
|
|
@ -3836,6 +3837,26 @@ static ssize_t order_show(struct kmem_cache *s, char *buf)
|
|||
}
|
||||
SLAB_ATTR(order);
|
||||
|
||||
static ssize_t min_partial_show(struct kmem_cache *s, char *buf)
|
||||
{
|
||||
return sprintf(buf, "%lu\n", s->min_partial);
|
||||
}
|
||||
|
||||
static ssize_t min_partial_store(struct kmem_cache *s, const char *buf,
|
||||
size_t length)
|
||||
{
|
||||
unsigned long min;
|
||||
int err;
|
||||
|
||||
err = strict_strtoul(buf, 10, &min);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
set_min_partial(s, min);
|
||||
return length;
|
||||
}
|
||||
SLAB_ATTR(min_partial);
|
||||
|
||||
static ssize_t ctor_show(struct kmem_cache *s, char *buf)
|
||||
{
|
||||
if (s->ctor) {
|
||||
|
|
@ -4151,6 +4172,7 @@ static struct attribute *slab_attrs[] = {
|
|||
&object_size_attr.attr,
|
||||
&objs_per_slab_attr.attr,
|
||||
&order_attr.attr,
|
||||
&min_partial_attr.attr,
|
||||
&objects_attr.attr,
|
||||
&objects_partial_attr.attr,
|
||||
&total_objects_attr.attr,
|
||||
|
|
|
|||
Loading…
Reference in New Issue