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author | Balbir Singh <balbir@linux.vnet.ibm.com> | 2008-02-07 00:13:50 -0800 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:18 -0800 |
commit | 8cdea7c05454260c0d4d83503949c358eb131d17 (patch) | |
tree | 62f8d7262744dd9ec507252bf3e84a89c088ff9b /mm | |
parent | e552b6617067ab785256dcec5ca29eeea981aacb (diff) | |
download | kernel_samsung_tuna-8cdea7c05454260c0d4d83503949c358eb131d17.zip kernel_samsung_tuna-8cdea7c05454260c0d4d83503949c358eb131d17.tar.gz kernel_samsung_tuna-8cdea7c05454260c0d4d83503949c358eb131d17.tar.bz2 |
Memory controller: cgroups setup
Setup the memory cgroup and add basic hooks and controls to integrate
and work with the cgroup.
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Paul Menage <menage@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Kirill Korotaev <dev@sw.ru>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: David Rientjes <rientjes@google.com>
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r-- | mm/Makefile | 1 | ||||
-rw-r--r-- | mm/memcontrol.c | 127 |
2 files changed, 128 insertions, 0 deletions
diff --git a/mm/Makefile b/mm/Makefile index 4af5dff..9f117ba 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -32,4 +32,5 @@ obj-$(CONFIG_FS_XIP) += filemap_xip.o obj-$(CONFIG_MIGRATION) += migrate.o obj-$(CONFIG_SMP) += allocpercpu.o obj-$(CONFIG_QUICKLIST) += quicklist.o +obj-$(CONFIG_CGROUP_MEM_CONT) += memcontrol.o diff --git a/mm/memcontrol.c b/mm/memcontrol.c new file mode 100644 index 0000000..80e48cd --- /dev/null +++ b/mm/memcontrol.c @@ -0,0 +1,127 @@ +/* memcontrol.c - Memory Controller + * + * Copyright IBM Corporation, 2007 + * Author Balbir Singh <balbir@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/res_counter.h> +#include <linux/memcontrol.h> +#include <linux/cgroup.h> + +struct cgroup_subsys mem_cgroup_subsys; + +/* + * The memory controller data structure. The memory controller controls both + * page cache and RSS per cgroup. We would eventually like to provide + * statistics based on the statistics developed by Rik Van Riel for clock-pro, + * to help the administrator determine what knobs to tune. + * + * TODO: Add a water mark for the memory controller. Reclaim will begin when + * we hit the water mark. + */ +struct mem_cgroup { + struct cgroup_subsys_state css; + /* + * the counter to account for memory usage + */ + struct res_counter res; +}; + +/* + * A page_cgroup page is associated with every page descriptor. The + * page_cgroup helps us identify information about the cgroup + */ +struct page_cgroup { + struct list_head lru; /* per cgroup LRU list */ + struct page *page; + struct mem_cgroup *mem_cgroup; +}; + + +static inline +struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont) +{ + return container_of(cgroup_subsys_state(cont, + mem_cgroup_subsys_id), struct mem_cgroup, + css); +} + +static ssize_t mem_cgroup_read(struct cgroup *cont, struct cftype *cft, + struct file *file, char __user *userbuf, size_t nbytes, + loff_t *ppos) +{ + return res_counter_read(&mem_cgroup_from_cont(cont)->res, + cft->private, userbuf, nbytes, ppos); +} + +static ssize_t mem_cgroup_write(struct cgroup *cont, struct cftype *cft, + struct file *file, const char __user *userbuf, + size_t nbytes, loff_t *ppos) +{ + return res_counter_write(&mem_cgroup_from_cont(cont)->res, + cft->private, userbuf, nbytes, ppos); +} + +static struct cftype mem_cgroup_files[] = { + { + .name = "usage", + .private = RES_USAGE, + .read = mem_cgroup_read, + }, + { + .name = "limit", + .private = RES_LIMIT, + .write = mem_cgroup_write, + .read = mem_cgroup_read, + }, + { + .name = "failcnt", + .private = RES_FAILCNT, + .read = mem_cgroup_read, + }, +}; + +static struct cgroup_subsys_state * +mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont) +{ + struct mem_cgroup *mem; + + mem = kzalloc(sizeof(struct mem_cgroup), GFP_KERNEL); + if (!mem) + return -ENOMEM; + + res_counter_init(&mem->res); + return &mem->css; +} + +static void mem_cgroup_destroy(struct cgroup_subsys *ss, + struct cgroup *cont) +{ + kfree(mem_cgroup_from_cont(cont)); +} + +static int mem_cgroup_populate(struct cgroup_subsys *ss, + struct cgroup *cont) +{ + return cgroup_add_files(cont, ss, mem_cgroup_files, + ARRAY_SIZE(mem_cgroup_files)); +} + +struct cgroup_subsys mem_cgroup_subsys = { + .name = "memory", + .subsys_id = mem_cgroup_subsys_id, + .create = mem_cgroup_create, + .destroy = mem_cgroup_destroy, + .populate = mem_cgroup_populate, + .early_init = 0, +}; |