mm: unify remaining mem_cont, mem, etc. variable names to memcg
Signed-off-by: Johannes Weiner <jweiner@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index abb66a2..aeb2393 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2844,12 +2844,12 @@
*/
int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
struct page *page,
- gfp_t mask, struct mem_cgroup **ptr)
+ gfp_t mask, struct mem_cgroup **memcgp)
{
struct mem_cgroup *memcg;
int ret;
- *ptr = NULL;
+ *memcgp = NULL;
if (mem_cgroup_disabled())
return 0;
@@ -2867,27 +2867,27 @@
memcg = try_get_mem_cgroup_from_page(page);
if (!memcg)
goto charge_cur_mm;
- *ptr = memcg;
- ret = __mem_cgroup_try_charge(NULL, mask, 1, ptr, true);
+ *memcgp = memcg;
+ ret = __mem_cgroup_try_charge(NULL, mask, 1, memcgp, true);
css_put(&memcg->css);
return ret;
charge_cur_mm:
if (unlikely(!mm))
mm = &init_mm;
- return __mem_cgroup_try_charge(mm, mask, 1, ptr, true);
+ return __mem_cgroup_try_charge(mm, mask, 1, memcgp, true);
}
static void
-__mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *ptr,
+__mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *memcg,
enum charge_type ctype)
{
if (mem_cgroup_disabled())
return;
- if (!ptr)
+ if (!memcg)
return;
- cgroup_exclude_rmdir(&ptr->css);
+ cgroup_exclude_rmdir(&memcg->css);
- __mem_cgroup_commit_charge_lrucare(page, ptr, ctype);
+ __mem_cgroup_commit_charge_lrucare(page, memcg, ctype);
/*
* Now swap is on-memory. This means this page may be
* counted both as mem and swap....double count.
@@ -2897,21 +2897,22 @@
*/
if (do_swap_account && PageSwapCache(page)) {
swp_entry_t ent = {.val = page_private(page)};
+ struct mem_cgroup *swap_memcg;
unsigned short id;
- struct mem_cgroup *memcg;
id = swap_cgroup_record(ent, 0);
rcu_read_lock();
- memcg = mem_cgroup_lookup(id);
- if (memcg) {
+ swap_memcg = mem_cgroup_lookup(id);
+ if (swap_memcg) {
/*
* This recorded memcg can be obsolete one. So, avoid
* calling css_tryget
*/
- if (!mem_cgroup_is_root(memcg))
- res_counter_uncharge(&memcg->memsw, PAGE_SIZE);
- mem_cgroup_swap_statistics(memcg, false);
- mem_cgroup_put(memcg);
+ if (!mem_cgroup_is_root(swap_memcg))
+ res_counter_uncharge(&swap_memcg->memsw,
+ PAGE_SIZE);
+ mem_cgroup_swap_statistics(swap_memcg, false);
+ mem_cgroup_put(swap_memcg);
}
rcu_read_unlock();
}
@@ -2920,13 +2921,14 @@
* 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(&ptr->css);
+ cgroup_release_and_wakeup_rmdir(&memcg->css);
}
-void mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *ptr)
+void mem_cgroup_commit_charge_swapin(struct page *page,
+ struct mem_cgroup *memcg)
{
- __mem_cgroup_commit_charge_swapin(page, ptr,
- MEM_CGROUP_CHARGE_TYPE_MAPPED);
+ __mem_cgroup_commit_charge_swapin(page, memcg,
+ MEM_CGROUP_CHARGE_TYPE_MAPPED);
}
void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
@@ -3255,14 +3257,14 @@
* page belongs to.
*/
int mem_cgroup_prepare_migration(struct page *page,
- struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask)
+ struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask)
{
struct mem_cgroup *memcg = NULL;
struct page_cgroup *pc;
enum charge_type ctype;
int ret = 0;
- *ptr = NULL;
+ *memcgp = NULL;
VM_BUG_ON(PageTransHuge(page));
if (mem_cgroup_disabled())
@@ -3313,10 +3315,10 @@
if (!memcg)
return 0;
- *ptr = memcg;
- ret = __mem_cgroup_try_charge(NULL, gfp_mask, 1, ptr, false);
+ *memcgp = memcg;
+ ret = __mem_cgroup_try_charge(NULL, gfp_mask, 1, memcgp, false);
css_put(&memcg->css);/* drop extra refcnt */
- if (ret || *ptr == NULL) {
+ if (ret || *memcgp == NULL) {
if (PageAnon(page)) {
lock_page_cgroup(pc);
ClearPageCgroupMigration(pc);
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 05c0f27..2958fd8 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -152,7 +152,7 @@
/* return true if the task is not adequate as candidate victim task. */
static bool oom_unkillable_task(struct task_struct *p,
- const struct mem_cgroup *mem, const nodemask_t *nodemask)
+ const struct mem_cgroup *memcg, const nodemask_t *nodemask)
{
if (is_global_init(p))
return true;
@@ -160,7 +160,7 @@
return true;
/* When mem_cgroup_out_of_memory() and p is not member of the group */
- if (mem && !task_in_mem_cgroup(p, mem))
+ if (memcg && !task_in_mem_cgroup(p, memcg))
return true;
/* p may not have freeable memory in nodemask */
@@ -179,12 +179,12 @@
* predictable as possible. The goal is to return the highest value for the
* task consuming the most memory to avoid subsequent oom failures.
*/
-unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
+unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *memcg,
const nodemask_t *nodemask, unsigned long totalpages)
{
long points;
- if (oom_unkillable_task(p, mem, nodemask))
+ if (oom_unkillable_task(p, memcg, nodemask))
return 0;
p = find_lock_task_mm(p);
@@ -308,7 +308,7 @@
* (not docbooked, we don't want this one cluttering up the manual)
*/
static struct task_struct *select_bad_process(unsigned int *ppoints,
- unsigned long totalpages, struct mem_cgroup *mem,
+ unsigned long totalpages, struct mem_cgroup *memcg,
const nodemask_t *nodemask)
{
struct task_struct *g, *p;
@@ -320,7 +320,7 @@
if (p->exit_state)
continue;
- if (oom_unkillable_task(p, mem, nodemask))
+ if (oom_unkillable_task(p, memcg, nodemask))
continue;
/*
@@ -364,7 +364,7 @@
}
}
- points = oom_badness(p, mem, nodemask, totalpages);
+ points = oom_badness(p, memcg, nodemask, totalpages);
if (points > *ppoints) {
chosen = p;
*ppoints = points;
@@ -387,14 +387,14 @@
*
* Call with tasklist_lock read-locked.
*/
-static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *nodemask)
+static void dump_tasks(const struct mem_cgroup *memcg, const nodemask_t *nodemask)
{
struct task_struct *p;
struct task_struct *task;
pr_info("[ pid ] uid tgid total_vm rss cpu oom_adj oom_score_adj name\n");
for_each_process(p) {
- if (oom_unkillable_task(p, mem, nodemask))
+ if (oom_unkillable_task(p, memcg, nodemask))
continue;
task = find_lock_task_mm(p);
@@ -417,7 +417,7 @@
}
static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
- struct mem_cgroup *mem, const nodemask_t *nodemask)
+ struct mem_cgroup *memcg, const nodemask_t *nodemask)
{
task_lock(current);
pr_warning("%s invoked oom-killer: gfp_mask=0x%x, order=%d, "
@@ -427,10 +427,10 @@
cpuset_print_task_mems_allowed(current);
task_unlock(current);
dump_stack();
- mem_cgroup_print_oom_info(mem, p);
+ mem_cgroup_print_oom_info(memcg, p);
show_mem(SHOW_MEM_FILTER_NODES);
if (sysctl_oom_dump_tasks)
- dump_tasks(mem, nodemask);
+ dump_tasks(memcg, nodemask);
}
#define K(x) ((x) << (PAGE_SHIFT-10))
@@ -484,7 +484,7 @@
static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
unsigned int points, unsigned long totalpages,
- struct mem_cgroup *mem, nodemask_t *nodemask,
+ struct mem_cgroup *memcg, nodemask_t *nodemask,
const char *message)
{
struct task_struct *victim = p;
@@ -493,7 +493,7 @@
unsigned int victim_points = 0;
if (printk_ratelimit())
- dump_header(p, gfp_mask, order, mem, nodemask);
+ dump_header(p, gfp_mask, order, memcg, nodemask);
/*
* If the task is already exiting, don't alarm the sysadmin or kill
@@ -524,7 +524,7 @@
/*
* oom_badness() returns 0 if the thread is unkillable
*/
- child_points = oom_badness(child, mem, nodemask,
+ child_points = oom_badness(child, memcg, nodemask,
totalpages);
if (child_points > victim_points) {
victim = child;
@@ -561,7 +561,7 @@
}
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
-void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask)
+void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask)
{
unsigned long limit;
unsigned int points = 0;
@@ -578,14 +578,14 @@
}
check_panic_on_oom(CONSTRAINT_MEMCG, gfp_mask, 0, NULL);
- limit = mem_cgroup_get_limit(mem) >> PAGE_SHIFT;
+ limit = mem_cgroup_get_limit(memcg) >> PAGE_SHIFT;
read_lock(&tasklist_lock);
retry:
- p = select_bad_process(&points, limit, mem, NULL);
+ p = select_bad_process(&points, limit, memcg, NULL);
if (!p || PTR_ERR(p) == -1UL)
goto out;
- if (oom_kill_process(p, gfp_mask, 0, points, limit, mem, NULL,
+ if (oom_kill_process(p, gfp_mask, 0, points, limit, memcg, NULL,
"Memory cgroup out of memory"))
goto retry;
out:
diff --git a/mm/rmap.c b/mm/rmap.c
index a2e5ce1..c8454e0 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -773,7 +773,7 @@
}
static int page_referenced_anon(struct page *page,
- struct mem_cgroup *mem_cont,
+ struct mem_cgroup *memcg,
unsigned long *vm_flags)
{
unsigned int mapcount;
@@ -796,7 +796,7 @@
* counting on behalf of references from different
* cgroups
*/
- if (mem_cont && !mm_match_cgroup(vma->vm_mm, mem_cont))
+ if (memcg && !mm_match_cgroup(vma->vm_mm, memcg))
continue;
referenced += page_referenced_one(page, vma, address,
&mapcount, vm_flags);
@@ -811,7 +811,7 @@
/**
* page_referenced_file - referenced check for object-based rmap
* @page: the page we're checking references on.
- * @mem_cont: target memory controller
+ * @memcg: target memory control group
* @vm_flags: collect encountered vma->vm_flags who actually referenced the page
*
* For an object-based mapped page, find all the places it is mapped and
@@ -822,7 +822,7 @@
* This function is only called from page_referenced for object-based pages.
*/
static int page_referenced_file(struct page *page,
- struct mem_cgroup *mem_cont,
+ struct mem_cgroup *memcg,
unsigned long *vm_flags)
{
unsigned int mapcount;
@@ -864,7 +864,7 @@
* counting on behalf of references from different
* cgroups
*/
- if (mem_cont && !mm_match_cgroup(vma->vm_mm, mem_cont))
+ if (memcg && !mm_match_cgroup(vma->vm_mm, memcg))
continue;
referenced += page_referenced_one(page, vma, address,
&mapcount, vm_flags);
@@ -880,7 +880,7 @@
* page_referenced - test if the page was referenced
* @page: the page to test
* @is_locked: caller holds lock on the page
- * @mem_cont: target memory controller
+ * @memcg: target memory cgroup
* @vm_flags: collect encountered vma->vm_flags who actually referenced the page
*
* Quick test_and_clear_referenced for all mappings to a page,
@@ -888,7 +888,7 @@
*/
int page_referenced(struct page *page,
int is_locked,
- struct mem_cgroup *mem_cont,
+ struct mem_cgroup *memcg,
unsigned long *vm_flags)
{
int referenced = 0;
@@ -904,13 +904,13 @@
}
}
if (unlikely(PageKsm(page)))
- referenced += page_referenced_ksm(page, mem_cont,
+ referenced += page_referenced_ksm(page, memcg,
vm_flags);
else if (PageAnon(page))
- referenced += page_referenced_anon(page, mem_cont,
+ referenced += page_referenced_anon(page, memcg,
vm_flags);
else if (page->mapping)
- referenced += page_referenced_file(page, mem_cont,
+ referenced += page_referenced_file(page, memcg,
vm_flags);
if (we_locked)
unlock_page(page);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 9520592..d999f09 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -847,12 +847,13 @@
static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
unsigned long addr, swp_entry_t entry, struct page *page)
{
- struct mem_cgroup *ptr;
+ struct mem_cgroup *memcg;
spinlock_t *ptl;
pte_t *pte;
int ret = 1;
- if (mem_cgroup_try_charge_swapin(vma->vm_mm, page, GFP_KERNEL, &ptr)) {
+ if (mem_cgroup_try_charge_swapin(vma->vm_mm, page,
+ GFP_KERNEL, &memcg)) {
ret = -ENOMEM;
goto out_nolock;
}
@@ -860,7 +861,7 @@
pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
if (unlikely(!pte_same(*pte, swp_entry_to_pte(entry)))) {
if (ret > 0)
- mem_cgroup_cancel_charge_swapin(ptr);
+ mem_cgroup_cancel_charge_swapin(memcg);
ret = 0;
goto out;
}
@@ -871,7 +872,7 @@
set_pte_at(vma->vm_mm, addr, pte,
pte_mkold(mk_pte(page, vma->vm_page_prot)));
page_add_anon_rmap(page, vma, addr);
- mem_cgroup_commit_charge_swapin(page, ptr);
+ mem_cgroup_commit_charge_swapin(page, memcg);
swap_free(entry);
/*
* Move the page to the active list so it is not
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 813aae8..e16ca83 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2376,7 +2376,7 @@
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
-unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
+unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *memcg,
gfp_t gfp_mask, bool noswap,
struct zone *zone,
unsigned long *nr_scanned)
@@ -2388,10 +2388,10 @@
.may_unmap = 1,
.may_swap = !noswap,
.order = 0,
- .target_mem_cgroup = mem,
+ .target_mem_cgroup = memcg,
};
struct mem_cgroup_zone mz = {
- .mem_cgroup = mem,
+ .mem_cgroup = memcg,
.zone = zone,
};
@@ -2417,7 +2417,7 @@
return sc.nr_reclaimed;
}
-unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
+unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
gfp_t gfp_mask,
bool noswap)
{
@@ -2430,7 +2430,7 @@
.may_swap = !noswap,
.nr_to_reclaim = SWAP_CLUSTER_MAX,
.order = 0,
- .target_mem_cgroup = mem_cont,
+ .target_mem_cgroup = memcg,
.nodemask = NULL, /* we don't care the placement */
.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
(GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK),
@@ -2444,7 +2444,7 @@
* take care of from where we get pages. So the node where we start the
* scan does not need to be the current node.
*/
- nid = mem_cgroup_select_victim_node(mem_cont);
+ nid = mem_cgroup_select_victim_node(memcg);
zonelist = NODE_DATA(nid)->node_zonelists;