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SLUB: rename defrag to remote_node_defrag_ratio 

The NUMA defrag works by allocating objects from partial slabs on remote
nodes.  Rename it to

	remote_node_defrag_ratio

to be clear about this.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Christoph Lameter 2008-01-07 23:20:26 -08:00
parent f61396aed9
commit 9824601ead
2 changed files with 13 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/slub_def.h
View File

@ -59,7 +59,10 @@ struct kmem_cache {
#endif
#ifdef CONFIG_NUMA
int defrag_ratio;
/*
* Defragmentation by allocating from a remote node.
*/
int remote_node_defrag_ratio;
struct kmem_cache_node *node[MAX_NUMNODES];
#endif
#ifdef CONFIG_SMP

17
mm/slub.c
View File

@ -1295,7 +1295,8 @@ static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags)
* expensive if we do it every time we are trying to find a slab
* with available objects.
*/
if (!s->defrag_ratio || get_cycles() % 1024 > s->defrag_ratio)
if (!s->remote_node_defrag_ratio ||
get_cycles() % 1024 > s->remote_node_defrag_ratio)
return NULL;
zonelist = &NODE_DATA(slab_node(current->mempolicy))
@ -2209,7 +2210,7 @@ static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags,
s->refcount = 1;
#ifdef CONFIG_NUMA
s->defrag_ratio = 100;
s->remote_node_defrag_ratio = 100;
#endif
if (!init_kmem_cache_nodes(s, gfpflags & ~SLUB_DMA))
goto error;
@ -3847,21 +3848,21 @@ static ssize_t free_calls_show(struct kmem_cache *s, char *buf)
SLAB_ATTR_RO(free_calls);
#ifdef CONFIG_NUMA
static ssize_t defrag_ratio_show(struct kmem_cache *s, char *buf)
static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf)
{
return sprintf(buf, "%d\n", s->defrag_ratio / 10);
return sprintf(buf, "%d\n", s->remote_node_defrag_ratio / 10);
}
static ssize_t defrag_ratio_store(struct kmem_cache *s,
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);
if (n < 100)
s->defrag_ratio = n * 10;
s->remote_node_defrag_ratio = n * 10;
return length;
}
SLAB_ATTR(defrag_ratio);
SLAB_ATTR(remote_node_defrag_ratio);
#endif
static struct attribute * slab_attrs[] = {
@ -3892,7 +3893,7 @@ static struct attribute * slab_attrs[] = {
&cache_dma_attr.attr,
#endif
#ifdef CONFIG_NUMA
&defrag_ratio_attr.attr,
&remote_node_defrag_ratio_attr.attr,
#endif
NULL
};