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authorJohannes Weiner <hannes@cmpxchg.org>2015-02-12 02:26:30 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-12 04:06:03 +0300
commit9c608dbe6a0d137f78498a5181eb0cd309f8f067 (patch)
treee0b2108f4be39dfd81a6376b405e0d0d5fbf3a3f /mm/memcontrol.c
parent94737a85f332aee75255960eaa16e89ddfa4c75a (diff)
downloadlinux-9c608dbe6a0d137f78498a5181eb0cd309f8f067.tar.xz
mm: memcontrol: simplify soft limit tree init code
- No need to test the node for N_MEMORY. node_online() is enough for node fallback to work in slab, use NUMA_NO_NODE for everything else. - Remove the BUG_ON() for allocation failure. A NULL pointer crash is just as descriptive, and the absent return value check is obvious. - Move local variables to the inner-most blocks. - Point to the tree structure after its initialized, not before, it's just more logical that way. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index fbf64e6f64e4..2efec685793b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4509,24 +4509,23 @@ EXPORT_SYMBOL(parent_mem_cgroup);
static void __init mem_cgroup_soft_limit_tree_init(void)
{
- struct mem_cgroup_tree_per_node *rtpn;
- struct mem_cgroup_tree_per_zone *rtpz;
- int tmp, node, zone;
+ int node;
for_each_node(node) {
- tmp = node;
- if (!node_state(node, N_NORMAL_MEMORY))
- tmp = -1;
- rtpn = kzalloc_node(sizeof(*rtpn), GFP_KERNEL, tmp);
- BUG_ON(!rtpn);
+ struct mem_cgroup_tree_per_node *rtpn;
+ int zone;
- soft_limit_tree.rb_tree_per_node[node] = rtpn;
+ rtpn = kzalloc_node(sizeof(*rtpn), GFP_KERNEL,
+ node_online(node) ? node : NUMA_NO_NODE);
for (zone = 0; zone < MAX_NR_ZONES; zone++) {
+ struct mem_cgroup_tree_per_zone *rtpz;
+
rtpz = &rtpn->rb_tree_per_zone[zone];
rtpz->rb_root = RB_ROOT;
spin_lock_init(&rtpz->lock);
}
+ soft_limit_tree.rb_tree_per_node[node] = rtpn;
}
}