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[PATCH] slab: reduce numa text size 

Reduce the NUMA text size of mm/slab.o a little on x86 by using a local
variable to store the result of numa_node_id().

    text    data     bss     dec     hex filename
   16858    2584      16   19458    4c02 mm/slab.o (before)
   16804    2584      16   19404    4bcc mm/slab.o (after)

[akpm@osdl.org: use better names]
[pbadari@us.ibm.com: fix that]
Cc: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pekka Enberg 2006-10-06 00:43:52 -07:00 committed by Linus Torvalds
parent da66b719d1
commit 1ca4cb2418
1 changed files with 22 additions and 14 deletions
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36
mm/slab.c
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@ -1106,15 +1106,18 @@ static inline int cache_free_alien(struct kmem_cache *cachep, void *objp)
int nodeid = slabp->nodeid;
struct kmem_list3 *l3;
struct array_cache *alien = NULL;
int node;
node = numa_node_id();
/*
* Make sure we are not freeing a object from another node to the array
* cache on this cpu.
*/
if (likely(slabp->nodeid == numa_node_id()))
if (likely(slabp->nodeid == node))
return 0;
l3 = cachep->nodelists[numa_node_id()];
l3 = cachep->nodelists[node];
STATS_INC_NODEFREES(cachep);
if (l3->alien && l3->alien[nodeid]) {
alien = l3->alien[nodeid];
@ -1352,6 +1355,7 @@ void __init kmem_cache_init(void)
struct cache_names *names;
int i;
int order;
int node;
for (i = 0; i < NUM_INIT_LISTS; i++) {
kmem_list3_init(&initkmem_list3[i]);
@ -1386,12 +1390,14 @@ void __init kmem_cache_init(void)
* 6) Resize the head arrays of the kmalloc caches to their final sizes.
*/
node = numa_node_id();
/* 1) create the cache_cache */
INIT_LIST_HEAD(&cache_chain);
list_add(&cache_cache.next, &cache_chain);
cache_cache.colour_off = cache_line_size();
cache_cache.array[smp_processor_id()] = &initarray_cache.cache;
cache_cache.nodelists[numa_node_id()] = &initkmem_list3[CACHE_CACHE];
cache_cache.nodelists[node] = &initkmem_list3[CACHE_CACHE];
cache_cache.buffer_size = ALIGN(cache_cache.buffer_size,
cache_line_size());
@ -1496,19 +1502,18 @@ void __init kmem_cache_init(void)
}
/* 5) Replace the bootstrap kmem_list3's */
{
int node;
/* Replace the static kmem_list3 structures for the boot cpu */
init_list(&cache_cache, &initkmem_list3[CACHE_CACHE],
numa_node_id());
int nid;
for_each_online_node(node) {
/* Replace the static kmem_list3 structures for the boot cpu */
init_list(&cache_cache, &initkmem_list3[CACHE_CACHE], node);
for_each_online_node(nid) {
init_list(malloc_sizes[INDEX_AC].cs_cachep,
&initkmem_list3[SIZE_AC + node], node);
&initkmem_list3[SIZE_AC + nid], nid);
if (INDEX_AC != INDEX_L3) {
init_list(malloc_sizes[INDEX_L3].cs_cachep,
&initkmem_list3[SIZE_L3 + node],
node);
&initkmem_list3[SIZE_L3 + nid], nid);
}
}
}
@ -2918,6 +2923,9 @@ static void *cache_alloc_refill(struct kmem_cache *cachep, gfp_t flags)
int batchcount;
struct kmem_list3 *l3;
struct array_cache *ac;
int node;
node = numa_node_id();
check_irq_off();
ac = cpu_cache_get(cachep);
@ -2931,7 +2939,7 @@ retry:
*/
batchcount = BATCHREFILL_LIMIT;
}
l3 = cachep->nodelists[numa_node_id()];
l3 = cachep->nodelists[node];
BUG_ON(ac->avail > 0 || !l3);
spin_lock(&l3->list_lock);
@ -2961,7 +2969,7 @@ retry:
STATS_SET_HIGH(cachep);
ac->entry[ac->avail++] = slab_get_obj(cachep, slabp,
numa_node_id());
node);
}
check_slabp(cachep, slabp);
@ -2980,7 +2988,7 @@ alloc_done:
if (unlikely(!ac->avail)) {
int x;
x = cache_grow(cachep, flags, numa_node_id());
x = cache_grow(cachep, flags, node);
/* cache_grow can reenable interrupts, then ac could change. */
ac = cpu_cache_get(cachep);