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Date: Wed, 18 Jul 2012 17:06:38 +0800
From: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
To: linux-mm@...ck.org
Cc: Michal Hocko <mhocko@...e.cz>,
Johannes Weiner <hannes@...xchg.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
Gavin Shan <shangw@...ux.vnet.ibm.com>,
Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Subject: [PATCH] mm/memcg: use exist interface to get css from memcg
Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
---
mm/memcontrol.c | 82 ++++++++++++++++++++++++++++---------------------------
1 files changed, 42 insertions(+), 40 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 20f6a15..42788b0 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -467,7 +467,7 @@ mem_cgroup_zoneinfo(struct mem_cgroup *memcg, int nid, int zid)
struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg)
{
- return &memcg->css;
+ return mem_cgroup_css(memcg);
}
static struct mem_cgroup_per_zone *
@@ -861,7 +861,7 @@ struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
if (unlikely(!memcg))
break;
- } while (!css_tryget(&memcg->css));
+ } while (!css_tryget(mem_cgroup_css(memcg)));
rcu_read_unlock();
return memcg;
}
@@ -897,10 +897,10 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root,
root = root_mem_cgroup;
if (prev && !reclaim)
- id = css_id(&prev->css);
+ id = css_id(mem_cgroup_css(prev));
if (prev && prev != root)
- css_put(&prev->css);
+ css_put(mem_cgroup_css(prev));
if (!root->use_hierarchy && root != root_mem_cgroup) {
if (prev)
@@ -925,9 +925,10 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root,
}
rcu_read_lock();
- css = css_get_next(&mem_cgroup_subsys, id + 1, &root->css, &id);
+ css = css_get_next(&mem_cgroup_subsys,
+ id + 1, mem_cgroup_css(root), &id);
if (css) {
- if (css == &root->css || css_tryget(css))
+ if (css == mem_cgroup_css(root) || css_tryget(css))
memcg = mem_cgroup_from_css(css,
struct mem_cgroup, css);
} else
@@ -959,7 +960,7 @@ void mem_cgroup_iter_break(struct mem_cgroup *root,
if (!root)
root = root_mem_cgroup;
if (prev && prev != root)
- css_put(&prev->css);
+ css_put(mem_cgroup_css(prev));
}
/*
@@ -1153,7 +1154,8 @@ static bool mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
{
if (root_memcg != memcg) {
return (root_memcg->use_hierarchy &&
- css_is_ancestor(&memcg->css, &root_memcg->css));
+ css_is_ancestor(mem_cgroup_css(memcg),
+ mem_cgroup_css(root_memcg)));
}
return true;
@@ -1178,7 +1180,7 @@ int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg)
task_lock(task);
curr = mem_cgroup_from_task(task);
if (curr)
- css_get(&curr->css);
+ css_get(mem_cgroup_css(curr));
task_unlock(task);
}
if (!curr)
@@ -1190,7 +1192,7 @@ int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg)
* hierarchy(even if use_hierarchy is disabled in "memcg").
*/
ret = mem_cgroup_same_or_subtree(memcg, curr);
- css_put(&curr->css);
+ css_put(mem_cgroup_css(curr));
return ret;
}
@@ -1282,7 +1284,7 @@ static unsigned long mem_cgroup_margin(struct mem_cgroup *memcg)
int mem_cgroup_swappiness(struct mem_cgroup *memcg)
{
- struct cgroup *cgrp = memcg->css.cgroup;
+ struct cgroup *cgrp = mem_cgroup_css(memcg)->cgroup;
/* root ? */
if (cgrp->parent == NULL)
@@ -1402,7 +1404,7 @@ void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
rcu_read_lock();
- mem_cgrp = memcg->css.cgroup;
+ mem_cgrp = mem_cgroup_css(memcg)->cgroup;
task_cgrp = task_cgroup(p, mem_cgroup_subsys_id);
ret = cgroup_path(task_cgrp, memcg_name, PATH_MAX);
@@ -2276,12 +2278,12 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
again:
if (*ptr) { /* css should be a valid one */
memcg = *ptr;
- VM_BUG_ON(css_is_removed(&memcg->css));
+ VM_BUG_ON(css_is_removed(mem_cgroup_css(memcg)));
if (mem_cgroup_is_root(memcg))
goto done;
if (nr_pages == 1 && consume_stock(memcg))
goto done;
- css_get(&memcg->css);
+ css_get(mem_cgroup_css(memcg));
} else {
struct task_struct *p;
@@ -2317,7 +2319,7 @@ again:
goto done;
}
/* after here, we may be blocked. we need to get refcnt */
- if (!css_tryget(&memcg->css)) {
+ if (!css_tryget(mem_cgroup_css(memcg))) {
rcu_read_unlock();
goto again;
}
@@ -2329,7 +2331,7 @@ again:
/* If killed, bypass charge */
if (fatal_signal_pending(current)) {
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
goto bypass;
}
@@ -2345,29 +2347,29 @@ again:
break;
case CHARGE_RETRY: /* not in OOM situation but retry */
batch = nr_pages;
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
memcg = NULL;
goto again;
case CHARGE_WOULDBLOCK: /* !__GFP_WAIT */
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
goto nomem;
case CHARGE_NOMEM: /* OOM routine works */
if (!oom) {
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
goto nomem;
}
/* If oom, we never return -ENOMEM */
nr_oom_retries--;
break;
case CHARGE_OOM_DIE: /* Killed by OOM Killer */
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
goto bypass;
}
} while (ret != CHARGE_OK);
if (batch > nr_pages)
refill_stock(memcg, batch - nr_pages);
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
done:
*ptr = memcg;
return 0;
@@ -2428,14 +2430,14 @@ struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
lock_page_cgroup(pc);
if (PageCgroupUsed(pc)) {
memcg = pc->mem_cgroup;
- if (memcg && !css_tryget(&memcg->css))
+ if (memcg && !css_tryget(mem_cgroup_css(memcg)))
memcg = NULL;
} else if (PageSwapCache(page)) {
ent.val = page_private(page);
id = lookup_swap_cgroup_id(ent);
rcu_read_lock();
memcg = mem_cgroup_lookup(id);
- if (memcg && !css_tryget(&memcg->css))
+ if (memcg && !css_tryget(mem_cgroup_css(memcg)))
memcg = NULL;
rcu_read_unlock();
}
@@ -2640,7 +2642,7 @@ static int mem_cgroup_move_parent(struct page *page,
struct mem_cgroup *child,
gfp_t gfp_mask)
{
- struct cgroup *cg = child->css.cgroup;
+ struct cgroup *cg = mem_cgroup_css(child)->cgroup;
struct cgroup *pcg = cg->parent;
struct mem_cgroup *parent;
unsigned int nr_pages;
@@ -2790,7 +2792,7 @@ int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
goto charge_cur_mm;
*memcgp = memcg;
ret = __mem_cgroup_try_charge(NULL, mask, 1, memcgp, true);
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
if (ret == -EINTR)
ret = 0;
return ret;
@@ -2813,7 +2815,7 @@ __mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *memcg,
return;
if (!memcg)
return;
- cgroup_exclude_rmdir(&memcg->css);
+ cgroup_exclude_rmdir(mem_cgroup_css(memcg));
pc = lookup_page_cgroup(page);
__mem_cgroup_commit_charge(memcg, page, 1, pc, ctype, true);
@@ -2850,7 +2852,7 @@ __mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *memcg,
* So, rmdir()->pre_destroy() can be called while we do this charge.
* In that case, we need to call pre_destroy() again. check it here.
*/
- cgroup_release_and_wakeup_rmdir(&memcg->css);
+ cgroup_release_and_wakeup_rmdir(mem_cgroup_css(memcg));
}
void mem_cgroup_commit_charge_swapin(struct page *page,
@@ -3089,7 +3091,7 @@ mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout)
* mem_cgroup_get() was called in uncharge().
*/
if (do_swap_account && swapout && memcg)
- swap_cgroup_record(ent, css_id(&memcg->css));
+ swap_cgroup_record(ent, css_id(mem_cgroup_css(memcg)));
}
#endif
@@ -3142,8 +3144,8 @@ static int mem_cgroup_move_swap_account(swp_entry_t entry,
{
unsigned short old_id, new_id;
- old_id = css_id(&from->css);
- new_id = css_id(&to->css);
+ old_id = css_id(mem_cgroup_css(from));
+ new_id = css_id(mem_cgroup_css(to));
if (swap_cgroup_cmpxchg(entry, old_id, new_id) == old_id) {
mem_cgroup_swap_statistics(from, false);
@@ -3202,7 +3204,7 @@ int mem_cgroup_prepare_migration(struct page *page,
lock_page_cgroup(pc);
if (PageCgroupUsed(pc)) {
memcg = pc->mem_cgroup;
- css_get(&memcg->css);
+ css_get(mem_cgroup_css(memcg));
/*
* At migrating an anonymous page, its mapcount goes down
* to 0 and uncharge() will be called. But, even if it's fully
@@ -3245,7 +3247,7 @@ int mem_cgroup_prepare_migration(struct page *page,
*memcgp = memcg;
ret = __mem_cgroup_try_charge(NULL, gfp_mask, 1, memcgp, false);
- css_put(&memcg->css);/* drop extra refcnt */
+ css_put(mem_cgroup_css(memcg));/* drop extra refcnt */
if (ret) {
if (PageAnon(page)) {
lock_page_cgroup(pc);
@@ -3286,7 +3288,7 @@ void mem_cgroup_end_migration(struct mem_cgroup *memcg,
if (!memcg)
return;
/* blocks rmdir() */
- cgroup_exclude_rmdir(&memcg->css);
+ cgroup_exclude_rmdir(mem_cgroup_css(memcg));
if (!migration_ok) {
used = oldpage;
unused = newpage;
@@ -3322,7 +3324,7 @@ void mem_cgroup_end_migration(struct mem_cgroup *memcg,
* So, rmdir()->pre_destroy() can be called while we do this charge.
* In that case, we need to call pre_destroy() again. check it here.
*/
- cgroup_release_and_wakeup_rmdir(&memcg->css);
+ cgroup_release_and_wakeup_rmdir(mem_cgroup_css(memcg));
}
/*
@@ -3686,9 +3688,9 @@ static int mem_cgroup_force_empty(struct mem_cgroup *memcg, bool free_all)
int ret;
int node, zid, shrink;
int nr_retries = MEM_CGROUP_RECLAIM_RETRIES;
- struct cgroup *cgrp = memcg->css.cgroup;
+ struct cgroup *cgrp = mem_cgroup_css(memcg)->cgroup;
- css_get(&memcg->css);
+ css_get(mem_cgroup_css(memcg));
shrink = 0;
/* should free all ? */
@@ -3729,7 +3731,7 @@ move_account:
/* "ret" should also be checked to ensure all lists are empty. */
} while (memcg->res.usage > 0 || ret);
out:
- css_put(&memcg->css);
+ css_put(mem_cgroup_css(memcg));
return ret;
try_to_free:
@@ -3928,7 +3930,7 @@ static void memcg_get_hierarchical_limit(struct mem_cgroup *memcg,
min_limit = res_counter_read_u64(&memcg->res, RES_LIMIT);
min_memsw_limit = res_counter_read_u64(&memcg->memsw, RES_LIMIT);
- cgroup = memcg->css.cgroup;
+ cgroup = mem_cgroup_css(memcg)->cgroup;
if (!memcg->use_hierarchy)
goto out;
@@ -4842,7 +4844,7 @@ static void __mem_cgroup_free(struct mem_cgroup *memcg)
int node;
mem_cgroup_remove_from_trees(memcg);
- free_css_id(&mem_cgroup_subsys, &memcg->css);
+ free_css_id(&mem_cgroup_subsys, mem_cgroup_css(memcg));
for_each_node(node)
free_mem_cgroup_per_zone_info(memcg, node);
@@ -4989,7 +4991,7 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
atomic_set(&memcg->refcnt, 1);
memcg->move_charge_at_immigrate = 0;
mutex_init(&memcg->thresholds_lock);
- return &memcg->css;
+ return mem_cgroup_css(memcg);
free_out:
__mem_cgroup_free(memcg);
return ERR_PTR(error);
--
1.7.5.4
--
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