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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6

Browse source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
  slub: #ifdef simplification
  slabinfo: Support printout of the number of fallbacks
  slub: Whitespace cleanup and use of strict_strtoul
This commit is contained in:
Linus Torvalds 2008-05-03 10:18:40 -07:00
commit c402f98c6d
3 changed files with 34 additions and 22 deletions
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10
Documentation/vm/slabinfo.c
View file

@ -38,7 +38,7 @@ struct slabinfo {
unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
unsigned long deactivate_to_head, deactivate_to_tail;
unsigned long deactivate_remote_frees;
unsigned long deactivate_remote_frees, order_fallback;
int numa[MAX_NODES];
int numa_partial[MAX_NODES];
} slabinfo[MAX_SLABS];
@ -293,7 +293,7 @@ int line = 0;
void first_line(void)
{
if (show_activity)
printf("Name Objects Alloc Free %%Fast\n");
printf("Name Objects Alloc Free %%Fast Fallb O\n");
else
printf("Name Objects Objsize Space "
"Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
@ -573,11 +573,12 @@ void slabcache(struct slabinfo *s)
total_alloc = s->alloc_fastpath + s->alloc_slowpath;
total_free = s->free_fastpath + s->free_slowpath;
printf("%-21s %8ld %8ld %8ld %3ld %3ld \n",
printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
s->name, s->objects,
total_alloc, total_free,
total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
total_free ? (s->free_fastpath * 100 / total_free) : 0);
total_free ? (s->free_fastpath * 100 / total_free) : 0,
s->order_fallback, s->order);
}
else
printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
@ -1188,6 +1189,7 @@ void read_slab_dir(void)
slab->deactivate_to_head = get_obj("deactivate_to_head");
slab->deactivate_to_tail = get_obj("deactivate_to_tail");
slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
slab->order_fallback = get_obj("order_fallback");
chdir("..");
if (slab->name[0] == ':')
alias_targets++;

2
init/Kconfig
View file

@ -720,7 +720,7 @@ config VM_EVENT_COUNTERS
config SLUB_DEBUG
default y
bool "Enable SLUB debugging support" if EMBEDDED
depends on SLUB
depends on SLUB && SYSFS
help
SLUB has extensive debug support features. Disabling these can
result in significant savings in code size. This also disables

44
mm/slub.c
View file

@ -217,7 +217,7 @@ struct track {
enum track_item { TRACK_ALLOC, TRACK_FREE };
#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
#ifdef CONFIG_SLUB_DEBUG
static int sysfs_slab_add(struct kmem_cache *);
static int sysfs_slab_alias(struct kmem_cache *, const char *);
static void sysfs_slab_remove(struct kmem_cache *);
@ -814,7 +814,8 @@ static int on_freelist(struct kmem_cache *s, struct page *page, void *search)
return search == NULL;
}
static void trace(struct kmem_cache *s, struct page *page, void *object, int alloc)
static void trace(struct kmem_cache *s, struct page *page, void *object,
int alloc)
{
if (s->flags & SLAB_TRACE) {
printk(KERN_INFO "TRACE %s %s 0x%p inuse=%d fp=0x%p\n",
@ -1267,8 +1268,7 @@ static void add_partial(struct kmem_cache_node *n,
spin_unlock(&n->list_lock);
}
static void remove_partial(struct kmem_cache *s,
struct page *page)
static void remove_partial(struct kmem_cache *s, struct page *page)
{
struct kmem_cache_node *n = get_node(s, page_to_nid(page));
@ -1283,7 +1283,8 @@ static void remove_partial(struct kmem_cache *s,
*
* Must hold list_lock.
*/
static inline int lock_and_freeze_slab(struct kmem_cache_node *n, struct page *page)
static inline int lock_and_freeze_slab(struct kmem_cache_node *n,
struct page *page)
{
if (slab_trylock(page)) {
list_del(&page->lru);
@ -1420,8 +1421,8 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
* so that the others get filled first. That way the
* size of the partial list stays small.
*
* kmem_cache_shrink can reclaim any empty slabs from the
* partial list.
* kmem_cache_shrink can reclaim any empty slabs from
* the partial list.
*/
add_partial(n, page, 1);
slab_unlock(page);
@ -2909,7 +2910,7 @@ static int slab_mem_going_online_callback(void *arg)
return 0;
/*
* We are bringing a node online. No memory is availabe yet. We must
* We are bringing a node online. No memory is available yet. We must
* allocate a kmem_cache_node structure in order to bring the node
* online.
*/
@ -3246,7 +3247,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
return slab_alloc(s, gfpflags, node, caller);
}
#if (defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)) || defined(CONFIG_SLABINFO)
#ifdef CONFIG_SLUB_DEBUG
static unsigned long count_partial(struct kmem_cache_node *n,
int (*get_count)(struct page *))
{
@ -3275,9 +3276,7 @@ static int count_free(struct page *page)
{
return page->objects - page->inuse;
}
#endif
#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
static int validate_slab(struct kmem_cache *s, struct page *page,
unsigned long *map)
{
@ -3812,7 +3811,12 @@ SLAB_ATTR_RO(objs_per_slab);
static ssize_t order_store(struct kmem_cache *s,
const char *buf, size_t length)
{
int order = simple_strtoul(buf, NULL, 10);
unsigned long order;
int err;
err = strict_strtoul(buf, 10, &order);
if (err)
return err;
if (order > slub_max_order || order < slub_min_order)
return -EINVAL;
@ -4065,10 +4069,16 @@ static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf)
static ssize_t remote_node_defrag_ratio_store(struct kmem_cache *s,
const char *buf, size_t length)
{
int n = simple_strtoul(buf, NULL, 10);
unsigned long ratio;
int err;
err = strict_strtoul(buf, 10, &ratio);
if (err)
return err;
if (ratio < 100)
s->remote_node_defrag_ratio = ratio * 10;
if (n < 100)
s->remote_node_defrag_ratio = n * 10;
return length;
}
SLAB_ATTR(remote_node_defrag_ratio);
@ -4425,8 +4435,8 @@ __initcall(slab_sysfs_init);
*/
#ifdef CONFIG_SLABINFO
ssize_t slabinfo_write(struct file *file, const char __user * buffer,
size_t count, loff_t *ppos)
ssize_t slabinfo_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
return -EINVAL;
}