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authorJohannes Weiner <hannes@cmpxchg.org>2016-01-20 15:02:41 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-20 17:09:18 -0800
commit489c2a20a414351fe0813a727c34600c0f7292ae (patch)
tree3e1417700db70366ac8d9a73b38958c3904732db /mm
parent04823c833b3eaef7816e28e3727124394f6bb3c3 (diff)
downloadop-kernel-dev-489c2a20a414351fe0813a727c34600c0f7292ae.zip
op-kernel-dev-489c2a20a414351fe0813a727c34600c0f7292ae.tar.gz
mm: memcontrol: introduce CONFIG_MEMCG_LEGACY_KMEM
Let the user know that CONFIG_MEMCG_KMEM does not apply to the cgroup2 interface. This also makes legacy-only code sections stand out better. [arnd@arndb.de: mm: memcontrol: only manage socket pressure for CONFIG_INET] Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Tejun Heo <tj@kernel.org> Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com> Signed-off-by: Arnd Bergmann <arnd@arndb.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/memcontrol.c18
-rw-r--r--mm/vmpressure.c2
2 files changed, 11 insertions, 9 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2239e6d..92e8ab6 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3001,7 +3001,7 @@ static void memcg_free_kmem(struct mem_cgroup *memcg)
}
#endif /* !CONFIG_SLOB */
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
unsigned long limit)
{
@@ -3025,7 +3025,7 @@ static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
{
return -EINVAL;
}
-#endif /* CONFIG_MEMCG_KMEM */
+#endif /* CONFIG_MEMCG_LEGACY_KMEM */
/*
@@ -4039,7 +4039,7 @@ static struct cftype mem_cgroup_legacy_files[] = {
.seq_show = memcg_numa_stat_show,
},
#endif
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
{
.name = "kmem.limit_in_bytes",
.private = MEMFILE_PRIVATE(_KMEM, RES_LIMIT),
@@ -4266,13 +4266,13 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
if (ret)
return ret;
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_INET
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
ret = tcp_init_cgroup(memcg);
if (ret)
return ret;
#endif
-#ifdef CONFIG_INET
if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
static_branch_inc(&memcg_sockets_enabled_key);
#endif
@@ -4329,7 +4329,7 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
memcg_free_kmem(memcg);
-#ifdef CONFIG_MEMCG_KMEM
+#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
tcp_destroy_cgroup(memcg);
#endif
@@ -5558,7 +5558,7 @@ void sock_update_memcg(struct sock *sk)
memcg = mem_cgroup_from_task(current);
if (memcg == root_mem_cgroup)
goto out;
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && !memcg->tcp_mem.active)
goto out;
#endif
@@ -5587,7 +5587,7 @@ bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
{
gfp_t gfp_mask = GFP_KERNEL;
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) {
struct page_counter *counter;
@@ -5619,7 +5619,7 @@ bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
*/
void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
{
-#ifdef CONFIG_MEMCG_KMEM
+#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) {
page_counter_uncharge(&memcg->tcp_mem.memory_allocated,
nr_pages);
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 9a6c070..89b1d44 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -275,6 +275,7 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
level = vmpressure_calc_level(scanned, reclaimed);
+#ifdef CONFIG_INET
if (level > VMPRESSURE_LOW) {
/*
* Let the socket buffer allocator know that
@@ -286,6 +287,7 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
*/
memcg->socket_pressure = jiffies + HZ;
}
+#endif
}
}
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