The patch titled
Subject: mm: memcontrol: fold move_anon() and move_file()
has been removed from the -mm tree. Its filename was
mm-memcontrol-fold-move_anon-and-move_file.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: fold move_anon() and move_file()
Turn the move type enum into flags and give the flags field a shorter
name. Once that is done, move_anon() and move_file() are simple enough to
just fold them into the callsites.
[akpm@xxxxxxxxxxxxxxxxxxxx: tweak MOVE_MASK definition, per Michal]
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxx>
Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 49 ++++++++++++++++------------------------------
1 file changed, 18 insertions(+), 31 deletions(-)
diff -puN mm/memcontrol.c~mm-memcontrol-fold-move_anon-and-move_file mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-fold-move_anon-and-move_file
+++ a/mm/memcontrol.c
@@ -369,21 +369,18 @@ static bool memcg_kmem_is_active(struct
/* Stuffs for move charges at task migration. */
/*
- * Types of charges to be moved. "move_charge_at_immitgrate" and
- * "immigrate_flags" are treated as a left-shifted bitmap of these types.
+ * Types of charges to be moved.
*/
-enum move_type {
- MOVE_CHARGE_TYPE_ANON, /* private anonymous page and swap of it */
- MOVE_CHARGE_TYPE_FILE, /* file page(including tmpfs) and swap of it */
- NR_MOVE_TYPE,
-};
+#define MOVE_ANON 0x1U
+#define MOVE_FILE 0x2U
+#define MOVE_MASK (MOVE_ANON | MOVE_FILE)
/* "mc" and its members are protected by cgroup_mutex */
static struct move_charge_struct {
spinlock_t lock; /* for from, to */
struct mem_cgroup *from;
struct mem_cgroup *to;
- unsigned long immigrate_flags;
+ unsigned long flags;
unsigned long precharge;
unsigned long moved_charge;
unsigned long moved_swap;
@@ -394,16 +391,6 @@ static struct move_charge_struct {
.waitq = __WAIT_QUEUE_HEAD_INITIALIZER(mc.waitq),
};
-static bool move_anon(void)
-{
- return test_bit(MOVE_CHARGE_TYPE_ANON, &mc.immigrate_flags);
-}
-
-static bool move_file(void)
-{
- return test_bit(MOVE_CHARGE_TYPE_FILE, &mc.immigrate_flags);
-}
-
/*
* Maximum loops in mem_cgroup_hierarchical_reclaim(), used for soft
* limit reclaim to prevent infinite loops, if they ever occur.
@@ -3500,7 +3487,7 @@ static int mem_cgroup_move_charge_write(
{
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
- if (val >= (1 << NR_MOVE_TYPE))
+ if (val & ~MOVE_MASK)
return -EINVAL;
/*
@@ -4773,12 +4760,12 @@ static struct page *mc_handle_present_pt
if (!page || !page_mapped(page))
return NULL;
if (PageAnon(page)) {
- /* we don't move shared anon */
- if (!move_anon())
+ if (!(mc.flags & MOVE_ANON))
return NULL;
- } else if (!move_file())
- /* we ignore mapcount for file pages */
- return NULL;
+ } else {
+ if (!(mc.flags & MOVE_FILE))
+ return NULL;
+ }
if (!get_page_unless_zero(page))
return NULL;
@@ -4792,7 +4779,7 @@ static struct page *mc_handle_swap_pte(s
struct page *page = NULL;
swp_entry_t ent = pte_to_swp_entry(ptent);
- if (!move_anon() || non_swap_entry(ent))
+ if (!(mc.flags & MOVE_ANON) || non_swap_entry(ent))
return NULL;
/*
* Because lookup_swap_cache() updates some statistics counter,
@@ -4821,7 +4808,7 @@ static struct page *mc_handle_file_pte(s
if (!vma->vm_file) /* anonymous vma */
return NULL;
- if (!move_file())
+ if (!(mc.flags & MOVE_FILE))
return NULL;
mapping = vma->vm_file->f_mapping;
@@ -4900,7 +4887,7 @@ static enum mc_target_type get_mctgt_typ
page = pmd_page(pmd);
VM_BUG_ON_PAGE(!page || !PageHead(page), page);
- if (!move_anon())
+ if (!(mc.flags & MOVE_ANON))
return ret;
if (page->mem_cgroup == mc.from) {
ret = MC_TARGET_PAGE;
@@ -5042,15 +5029,15 @@ static int mem_cgroup_can_attach(struct
struct task_struct *p = cgroup_taskset_first(tset);
int ret = 0;
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
- unsigned long move_charge_at_immigrate;
+ unsigned long move_flags;
/*
* We are now commited to this value whatever it is. Changes in this
* tunable will only affect upcoming migrations, not the current one.
* So we need to save it, and keep it going.
*/
- move_charge_at_immigrate = memcg->move_charge_at_immigrate;
- if (move_charge_at_immigrate) {
+ move_flags = ACCESS_ONCE(memcg->move_charge_at_immigrate);
+ if (move_flags) {
struct mm_struct *mm;
struct mem_cgroup *from = mem_cgroup_from_task(p);
@@ -5070,7 +5057,7 @@ static int mem_cgroup_can_attach(struct
spin_lock(&mc.lock);
mc.from = from;
mc.to = memcg;
- mc.immigrate_flags = move_charge_at_immigrate;
+ mc.flags = move_flags;
spin_unlock(&mc.lock);
/* We set mc.moving_task later */
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
origin.patch
list_lru-introduce-list_lru_shrink_countwalk.patch
fs-consolidate-nrfree_cached_objects-args-in-shrink_control.patch
vmscan-per-memory-cgroup-slab-shrinkers.patch
memcg-rename-some-cache-id-related-variables.patch
memcg-add-rwsem-to-synchronize-against-memcg_caches-arrays-relocation.patch
list_lru-get-rid-of-active_nodes.patch
list_lru-organize-all-list_lrus-to-list.patch
list_lru-introduce-per-memcg-lists.patch
fs-make-shrinker-memcg-aware.patch
fs-shrinker-always-scan-at-least-one-object-of-each-type.patch
fs-shrinker-always-scan-at-least-one-object-of-each-type-fix.patch
mm-vmscan-fix-the-page-state-calculation-in-too_many_isolated.patch
slab-embed-memcg_cache_params-to-kmem_cache.patch
slab-link-memcg-caches-of-the-same-kind-into-a-list.patch
cgroup-release-css-id-after-css_free.patch
slab-use-css-id-for-naming-per-memcg-caches.patch
memcg-free-memcg_caches-slot-on-css-offline.patch
list_lru-add-helpers-to-isolate-items.patch
memcg-reparent-list_lrus-and-free-kmemcg_id-on-css-offline.patch
memcg-cleanup-static-keys-decrement.patch
documentation-proc-add-proc-pid-numa_maps-interface-explanation-snippet.patch
fs-proc-task_mmu-show-page-size-in-proc-pid-numa_maps.patch
fs-proc-task_mmu-show-page-size-in-proc-pid-numa_maps-fix.patch
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