From: Christoph Lameter 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 Signed-off-by: Andrew Morton --- include/linux/slub_def.h | 5 ++++- mm/slub.c | 17 +++++++++-------- 2 files changed, 13 insertions(+), 9 deletions(-) diff -puN include/linux/slub_def.h~slub-rename-numa-defrag_ratio-to-remote_node_defrag_ratio include/linux/slub_def.h --- a/include/linux/slub_def.h~slub-rename-numa-defrag_ratio-to-remote_node_defrag_ratio +++ a/include/linux/slub_def.h @@ -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 diff -puN mm/slub.c~slub-rename-numa-defrag_ratio-to-remote_node_defrag_ratio mm/slub.c --- a/mm/slub.c~slub-rename-numa-defrag_ratio-to-remote_node_defrag_ratio +++ a/mm/slub.c @@ -1292,7 +1292,8 @@ static struct page *get_any_partial(stru * 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)) @@ -2206,7 +2207,7 @@ static int kmem_cache_open(struct kmem_c 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; @@ -3848,21 +3849,21 @@ static ssize_t free_calls_show(struct km 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[] = { @@ -3893,7 +3894,7 @@ 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 }; _