From 33327948782bcef89c78eb47af86b6a2df9fd4a5 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Tue, 29 Apr 2008 01:00:24 -0700 Subject: [PATCH] memcgroup: use vmalloc for mem_cgroup allocation On ia64, this kmalloc() requires order-4 pages. But this is not necessary to be physically contiguous. For big mem_cgroup, vmalloc is better. For small ones, kmalloc is used. [akpm@linux-foundation.org: simplification] Signed-off-by: KAMEZAWA Hiroyuki Cc: Pavel Emelyanov Cc: Li Zefan Cc: Balbir Singh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 35 +++++++++++++++++++++++++++++------ 1 file changed, 29 insertions(+), 6 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c5285afe20..15aa34b11e 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -31,6 +31,7 @@ #include #include #include +#include #include @@ -983,6 +984,29 @@ static void free_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node) kfree(mem->info.nodeinfo[node]); } +static struct mem_cgroup *mem_cgroup_alloc(void) +{ + struct mem_cgroup *mem; + + if (sizeof(*mem) < PAGE_SIZE) + mem = kmalloc(sizeof(*mem), GFP_KERNEL); + else + mem = vmalloc(sizeof(*mem)); + + if (mem) + memset(mem, 0, sizeof(*mem)); + return mem; +} + +static void mem_cgroup_free(struct mem_cgroup *mem) +{ + if (sizeof(*mem) < PAGE_SIZE) + kfree(mem); + else + vfree(mem); +} + + static struct cgroup_subsys_state * mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont) { @@ -993,12 +1017,11 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont) mem = &init_mem_cgroup; page_cgroup_cache = KMEM_CACHE(page_cgroup, SLAB_PANIC); } else { - mem = kzalloc(sizeof(struct mem_cgroup), GFP_KERNEL); + mem = mem_cgroup_alloc(); + if (!mem) + return ERR_PTR(-ENOMEM); } - if (mem == NULL) - return ERR_PTR(-ENOMEM); - res_counter_init(&mem->res); memset(&mem->info, 0, sizeof(mem->info)); @@ -1012,7 +1035,7 @@ free_out: for_each_node_state(node, N_POSSIBLE) free_mem_cgroup_per_zone_info(mem, node); if (cont->parent != NULL) - kfree(mem); + mem_cgroup_free(mem); return ERR_PTR(-ENOMEM); } @@ -1032,7 +1055,7 @@ static void mem_cgroup_destroy(struct cgroup_subsys *ss, for_each_node_state(node, N_POSSIBLE) free_mem_cgroup_per_zone_info(mem, node); - kfree(mem_cgroup_from_cont(cont)); + mem_cgroup_free(mem_cgroup_from_cont(cont)); } static int mem_cgroup_populate(struct cgroup_subsys *ss, -- 2.39.5