The patch titled
Subject: mm: memcontrol: remove double kmem page_counter init
has been removed from the -mm tree. Its filename was
mm-memcontrol-remove-double-kmem-page_counter-init.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: remove double kmem page_counter init
The kmem page_counter's limit is initialized to PAGE_COUNTER_MAX inside
mem_cgroup_css_online(). There is no need to repeat this from
memcg_propagate_kmem().
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Acked-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 24 ++++++++++--------------
1 file changed, 10 insertions(+), 14 deletions(-)
diff -puN mm/memcontrol.c~mm-memcontrol-remove-double-kmem-page_counter-init mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-remove-double-kmem-page_counter-init
+++ a/mm/memcontrol.c
@@ -2861,8 +2861,7 @@ static u64 mem_cgroup_read_u64(struct cg
}
#ifdef CONFIG_MEMCG_KMEM
-static int memcg_activate_kmem(struct mem_cgroup *memcg,
- unsigned long nr_pages)
+static int memcg_activate_kmem(struct mem_cgroup *memcg)
{
int err = 0;
int memcg_id;
@@ -2897,13 +2896,6 @@ static int memcg_activate_kmem(struct me
goto out;
}
- /*
- * We couldn't have accounted to this cgroup, because it hasn't got
- * activated yet, so this should succeed.
- */
- err = page_counter_limit(&memcg->kmem, nr_pages);
- VM_BUG_ON(err);
-
static_branch_inc(&memcg_kmem_enabled_key);
/*
* A memory cgroup is considered kmem-active as soon as it gets
@@ -2924,10 +2916,14 @@ static int memcg_update_kmem_limit(struc
int ret;
mutex_lock(&memcg_limit_mutex);
- if (!memcg_kmem_is_active(memcg))
- ret = memcg_activate_kmem(memcg, limit);
- else
- ret = page_counter_limit(&memcg->kmem, limit);
+ /* Top-level cgroup doesn't propagate from root */
+ if (!memcg_kmem_is_active(memcg)) {
+ ret = memcg_activate_kmem(memcg);
+ if (ret)
+ goto out;
+ }
+ ret = page_counter_limit(&memcg->kmem, limit);
+out:
mutex_unlock(&memcg_limit_mutex);
return ret;
}
@@ -2946,7 +2942,7 @@ static int memcg_propagate_kmem(struct m
* after this point, because it has at least one child already.
*/
if (memcg_kmem_is_active(parent))
- ret = memcg_activate_kmem(memcg, PAGE_COUNTER_MAX);
+ ret = memcg_activate_kmem(memcg);
mutex_unlock(&memcg_limit_mutex);
return ret;
}
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
proc-revert-proc-pid-maps-annotation.patch
mm-oom_killc-dont-skip-pf_exiting-tasks-when-searching-for-a-victim.patch
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