#include <linux/backing-dev.h>
#include <linux/bit_spinlock.h>
#include <linux/rcupdate.h>
+#include <linux/slab.h>
#include <linux/swap.h>
#include <linux/spinlock.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
+#include <linux/vmalloc.h>
#include <asm/uaccess.h>
struct cgroup_subsys mem_cgroup_subsys;
static const int MEM_CGROUP_RECLAIM_RETRIES = 5;
+static struct kmem_cache *page_cgroup_cache;
/*
* Statistics for memory cgroup.
*/
MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
MEM_CGROUP_STAT_RSS, /* # of pages charged as rss */
+ MEM_CGROUP_STAT_PGPGIN_COUNT, /* # of pages paged in */
+ MEM_CGROUP_STAT_PGPGOUT_COUNT, /* # of pages paged out */
MEM_CGROUP_STAT_NSTATS,
};
__mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_CACHE, val);
else
__mem_cgroup_stat_add_safe(stat, MEM_CGROUP_STAT_RSS, val);
+
+ if (charge)
+ __mem_cgroup_stat_add_safe(stat,
+ MEM_CGROUP_STAT_PGPGIN_COUNT, 1);
+ else
+ __mem_cgroup_stat_add_safe(stat,
+ MEM_CGROUP_STAT_PGPGOUT_COUNT, 1);
}
static struct mem_cgroup_per_zone *
bit_spin_unlock(PAGE_CGROUP_LOCK_BIT, &page->page_cgroup);
}
-static void __mem_cgroup_remove_list(struct page_cgroup *pc)
+static void __mem_cgroup_remove_list(struct mem_cgroup_per_zone *mz,
+ struct page_cgroup *pc)
{
int from = pc->flags & PAGE_CGROUP_FLAG_ACTIVE;
- struct mem_cgroup_per_zone *mz = page_cgroup_zoneinfo(pc);
if (from)
MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_ACTIVE) -= 1;
list_del_init(&pc->lru);
}
-static void __mem_cgroup_add_list(struct page_cgroup *pc)
+static void __mem_cgroup_add_list(struct mem_cgroup_per_zone *mz,
+ struct page_cgroup *pc)
{
int to = pc->flags & PAGE_CGROUP_FLAG_ACTIVE;
- struct mem_cgroup_per_zone *mz = page_cgroup_zoneinfo(pc);
if (!to) {
MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_INACTIVE) += 1;
}
unlock_page_cgroup(page);
- pc = kzalloc(sizeof(struct page_cgroup), gfp_mask);
+ pc = kmem_cache_zalloc(page_cgroup_cache, gfp_mask);
if (pc == NULL)
goto err;
mem_cgroup_out_of_memory(mem, gfp_mask);
goto out;
}
- congestion_wait(WRITE, HZ/10);
}
pc->ref_cnt = 1;
pc->page = page;
pc->flags = PAGE_CGROUP_FLAG_ACTIVE;
if (ctype == MEM_CGROUP_CHARGE_TYPE_CACHE)
- pc->flags |= PAGE_CGROUP_FLAG_CACHE;
+ pc->flags = PAGE_CGROUP_FLAG_CACHE;
lock_page_cgroup(page);
if (page_get_page_cgroup(page)) {
*/
res_counter_uncharge(&mem->res, PAGE_SIZE);
css_put(&mem->css);
- kfree(pc);
+ kmem_cache_free(page_cgroup_cache, pc);
goto retry;
}
page_assign_page_cgroup(page, pc);
mz = page_cgroup_zoneinfo(pc);
spin_lock_irqsave(&mz->lru_lock, flags);
- __mem_cgroup_add_list(pc);
+ __mem_cgroup_add_list(mz, pc);
spin_unlock_irqrestore(&mz->lru_lock, flags);
unlock_page_cgroup(page);
return 0;
out:
css_put(&mem->css);
- kfree(pc);
+ kmem_cache_free(page_cgroup_cache, pc);
err:
return -ENOMEM;
}
if (--(pc->ref_cnt) == 0) {
mz = page_cgroup_zoneinfo(pc);
spin_lock_irqsave(&mz->lru_lock, flags);
- __mem_cgroup_remove_list(pc);
+ __mem_cgroup_remove_list(mz, pc);
spin_unlock_irqrestore(&mz->lru_lock, flags);
page_assign_page_cgroup(page, NULL);
res_counter_uncharge(&mem->res, PAGE_SIZE);
css_put(&mem->css);
- kfree(pc);
+ kmem_cache_free(page_cgroup_cache, pc);
return;
}
mz = page_cgroup_zoneinfo(pc);
spin_lock_irqsave(&mz->lru_lock, flags);
- __mem_cgroup_remove_list(pc);
+ __mem_cgroup_remove_list(mz, pc);
spin_unlock_irqrestore(&mz->lru_lock, flags);
page_assign_page_cgroup(page, NULL);
mz = page_cgroup_zoneinfo(pc);
spin_lock_irqsave(&mz->lru_lock, flags);
- __mem_cgroup_add_list(pc);
+ __mem_cgroup_add_list(mz, pc);
spin_unlock_irqrestore(&mz->lru_lock, flags);
unlock_page_cgroup(newpage);
mem_cgroup_write_strategy);
}
-static ssize_t mem_force_empty_write(struct cgroup *cont,
- struct cftype *cft, struct file *file,
- const char __user *userbuf,
- size_t nbytes, loff_t *ppos)
+static int mem_cgroup_reset(struct cgroup *cont, unsigned int event)
{
- struct mem_cgroup *mem = mem_cgroup_from_cont(cont);
- int ret = mem_cgroup_force_empty(mem);
- if (!ret)
- ret = nbytes;
- return ret;
+ struct mem_cgroup *mem;
+
+ mem = mem_cgroup_from_cont(cont);
+ switch (event) {
+ case RES_MAX_USAGE:
+ res_counter_reset_max(&mem->res);
+ break;
+ case RES_FAILCNT:
+ res_counter_reset_failcnt(&mem->res);
+ break;
+ }
+ return 0;
+}
+
+static int mem_force_empty_write(struct cgroup *cont, unsigned int event)
+{
+ return mem_cgroup_force_empty(mem_cgroup_from_cont(cont));
}
static const struct mem_cgroup_stat_desc {
} mem_cgroup_stat_desc[] = {
[MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
[MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
+ [MEM_CGROUP_STAT_PGPGIN_COUNT] = {"pgpgin", 1, },
+ [MEM_CGROUP_STAT_PGPGOUT_COUNT] = {"pgpgout", 1, },
};
static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
.private = RES_USAGE,
.read_u64 = mem_cgroup_read,
},
+ {
+ .name = "max_usage_in_bytes",
+ .private = RES_MAX_USAGE,
+ .trigger = mem_cgroup_reset,
+ .read_u64 = mem_cgroup_read,
+ },
{
.name = "limit_in_bytes",
.private = RES_LIMIT,
{
.name = "failcnt",
.private = RES_FAILCNT,
+ .trigger = mem_cgroup_reset,
.read_u64 = mem_cgroup_read,
},
{
.name = "force_empty",
- .write = mem_force_empty_write,
+ .trigger = mem_force_empty_write,
},
{
.name = "stat",
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)
{
struct mem_cgroup *mem;
int node;
- if (unlikely((cont->parent) == NULL))
+ if (unlikely((cont->parent) == NULL)) {
mem = &init_mem_cgroup;
- else
- mem = kzalloc(sizeof(struct mem_cgroup), GFP_KERNEL);
-
- if (mem == NULL)
- return ERR_PTR(-ENOMEM);
+ page_cgroup_cache = KMEM_CACHE(page_cgroup, SLAB_PANIC);
+ } else {
+ mem = mem_cgroup_alloc();
+ if (!mem)
+ return ERR_PTR(-ENOMEM);
+ }
res_counter_init(&mem->res);
- memset(&mem->info, 0, sizeof(mem->info));
-
for_each_node_state(node, N_POSSIBLE)
if (alloc_mem_cgroup_per_zone_info(mem, node))
goto 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);
}
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,
git.openpandora.org / pandora-kernel.git / blobdiff