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authorHugh Dickins <hughd@google.com>2012-05-29 15:06:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 16:22:24 -0700
commite91cbb42531626cd4fd0673ca01daf53e338d8f9 (patch)
treea7138650c4a4914e539f3eeeb69e39d22dba4242 /mm
parent4b91355e9dc9ac1eb3d69e56de093899ff2677ef (diff)
memcg swap: mem_cgroup_move_swap_account never needs fixup
The need_fixup arg to mem_cgroup_move_swap_account() is always false, so just remove it. Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> 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/memcontrol.c19
1 files changed, 3 insertions, 16 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e7db70f3d2d..d5ba631e0ec 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3165,7 +3165,6 @@ void mem_cgroup_uncharge_swap(swp_entry_t ent)
* @entry: swap entry to be moved
* @from: mem_cgroup which the entry is moved from
* @to: mem_cgroup which the entry is moved to
- * @need_fixup: whether we should fixup res_counters and refcounts.
*
* It succeeds only when the swap_cgroup's record for this entry is the same
* as the mem_cgroup's id of @from.
@@ -3176,7 +3175,7 @@ void mem_cgroup_uncharge_swap(swp_entry_t ent)
* both res and memsw, and called css_get().
*/
static int mem_cgroup_move_swap_account(swp_entry_t entry,
- struct mem_cgroup *from, struct mem_cgroup *to, bool need_fixup)
+ struct mem_cgroup *from, struct mem_cgroup *to)
{
unsigned short old_id, new_id;
@@ -3195,24 +3194,13 @@ static int mem_cgroup_move_swap_account(swp_entry_t entry,
* swap-in, the refcount of @to might be decreased to 0.
*/
mem_cgroup_get(to);
- if (need_fixup) {
- if (!mem_cgroup_is_root(from))
- res_counter_uncharge(&from->memsw, PAGE_SIZE);
- mem_cgroup_put(from);
- /*
- * we charged both to->res and to->memsw, so we should
- * uncharge to->res.
- */
- if (!mem_cgroup_is_root(to))
- res_counter_uncharge(&to->res, PAGE_SIZE);
- }
return 0;
}
return -EINVAL;
}
#else
static inline int mem_cgroup_move_swap_account(swp_entry_t entry,
- struct mem_cgroup *from, struct mem_cgroup *to, bool need_fixup)
+ struct mem_cgroup *from, struct mem_cgroup *to)
{
return -EINVAL;
}
@@ -5546,8 +5534,7 @@ put: /* get_mctgt_type() gets the page */
break;
case MC_TARGET_SWAP:
ent = target.ent;
- if (!mem_cgroup_move_swap_account(ent,
- mc.from, mc.to, false)) {
+ if (!mem_cgroup_move_swap_account(ent, mc.from, mc.to)) {
mc.precharge--;
/* we fixup refcnts and charges later. */
mc.moved_swap++;