aboutsummaryrefslogtreecommitdiff
path: root/mm
diff options
context:
space:
mode:
authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2018-08-17 15:49:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-17 16:20:32 -0700
commit6cfe57a96ba33139c57056185d5eee9018e3dedc (patch)
tree801e1dd228acd93078bd7548879f7577d16cc486 /mm
parent87a5ffc163966b2eb675c9c863c0caccab3183f6 (diff)
downloadlinux-stericsson-6cfe57a96ba33139c57056185d5eee9018e3dedc.tar.gz
mm/list_lru.c: move locking from __list_lru_walk_one() to its caller
Move the locking inside __list_lru_walk_one() to its caller. This is a preparation step in order to introduce list_lru_walk_one_irq() which does spin_lock_irq() instead of spin_lock() for the locking. Link: http://lkml.kernel.org/r/20180716111921.5365-3-bigeasy@linutronix.de Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> 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/list_lru.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/mm/list_lru.c b/mm/list_lru.c
index 522b98ca76b3..286f92a0963e 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -219,7 +219,6 @@ __list_lru_walk_one(struct list_lru *lru, int nid, int memcg_idx,
struct list_head *item, *n;
unsigned long isolated = 0;
- spin_lock(&nlru->lock);
l = list_lru_from_memcg_idx(nlru, memcg_idx);
restart:
list_for_each_safe(item, n, &l->list) {
@@ -265,8 +264,6 @@ restart:
BUG();
}
}
-
- spin_unlock(&nlru->lock);
return isolated;
}
@@ -275,8 +272,14 @@ list_lru_walk_one(struct list_lru *lru, int nid, struct mem_cgroup *memcg,
list_lru_walk_cb isolate, void *cb_arg,
unsigned long *nr_to_walk)
{
- return __list_lru_walk_one(lru, nid, memcg_cache_id(memcg),
- isolate, cb_arg, nr_to_walk);
+ struct list_lru_node *nlru = &lru->node[nid];
+ unsigned long ret;
+
+ spin_lock(&nlru->lock);
+ ret = __list_lru_walk_one(lru, nid, memcg_cache_id(memcg),
+ isolate, cb_arg, nr_to_walk);
+ spin_unlock(&nlru->lock);
+ return ret;
}
EXPORT_SYMBOL_GPL(list_lru_walk_one);
@@ -291,8 +294,13 @@ unsigned long list_lru_walk_node(struct list_lru *lru, int nid,
nr_to_walk);
if (*nr_to_walk > 0 && list_lru_memcg_aware(lru)) {
for_each_memcg_cache_index(memcg_idx) {
+ struct list_lru_node *nlru = &lru->node[nid];
+
+ spin_lock(&nlru->lock);
isolated += __list_lru_walk_one(lru, nid, memcg_idx,
isolate, cb_arg, nr_to_walk);
+ spin_unlock(&nlru->lock);
+
if (*nr_to_walk <= 0)
break;
}