The patch titled
memcg: add dirty limits to mem_cgroup
has been removed from the -mm tree. Its filename was
memcg-add-dirty-limits-to-mem_cgroup.patch
This patch was dropped because an updated version will be merged
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: memcg: add dirty limits to mem_cgroup
From: Greg Thelen <gthelen@xxxxxxxxxx>
Extend mem_cgroup to contain dirty page limits.
Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx>
Signed-off-by: Andrea Righi <arighi@xxxxxxxxxxx>
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Cc: Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Chad Talbott <ctalbott@xxxxxxxxxx>
Cc: Justin TerAvest <teravest@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 51 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 50 insertions(+), 1 deletion(-)
diff -puN mm/memcontrol.c~memcg-add-dirty-limits-to-mem_cgroup mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-add-dirty-limits-to-mem_cgroup
+++ a/mm/memcontrol.c
@@ -203,6 +203,14 @@ struct mem_cgroup_eventfd_list {
static void mem_cgroup_threshold(struct mem_cgroup *mem);
static void mem_cgroup_oom_notify(struct mem_cgroup *mem);
+/* Dirty memory parameters */
+struct vm_dirty_param {
+ int dirty_ratio;
+ int dirty_background_ratio;
+ unsigned long dirty_bytes;
+ unsigned long dirty_background_bytes;
+};
+
/*
* The memory controller data structure. The memory controller controls both
* page cache and RSS per cgroup. We would eventually like to provide
@@ -242,6 +250,10 @@ struct mem_cgroup {
atomic_t refcnt;
unsigned int swappiness;
+
+ /* control memory cgroup dirty pages */
+ struct vm_dirty_param dirty_param;
+
/* OOM-Killer disable */
int oom_kill_disable;
@@ -1198,6 +1210,36 @@ static unsigned int get_swappiness(struc
return memcg->swappiness;
}
+/*
+ * Return true if the current memory cgroup has local dirty memory settings.
+ * There is an allowed race between the current task migrating in-to/out-of the
+ * root cgroup while this routine runs. So the return value may be incorrect if
+ * the current task is being simultaneously migrated.
+ */
+static bool mem_cgroup_has_dirty_limit(struct mem_cgroup *mem)
+{
+ return mem && !mem_cgroup_is_root(mem);
+}
+
+/*
+ * Returns a snapshot of the current dirty limits which is not synchronized with
+ * the routines that change the dirty limits. If this routine races with an
+ * update to the dirty bytes/ratio value, then the caller must handle the case
+ * where neither dirty_[background_]_ratio nor _bytes are set.
+ */
+static void mem_cgroup_dirty_param(struct vm_dirty_param *param,
+ struct mem_cgroup *mem)
+{
+ if (mem_cgroup_has_dirty_limit(mem)) {
+ *param = mem->dirty_param;
+ } else {
+ param->dirty_ratio = vm_dirty_ratio;
+ param->dirty_bytes = vm_dirty_bytes;
+ param->dirty_background_ratio = dirty_background_ratio;
+ param->dirty_background_bytes = dirty_background_bytes;
+ }
+}
+
static void mem_cgroup_start_move(struct mem_cgroup *mem)
{
int cpu;
@@ -4669,8 +4711,15 @@ mem_cgroup_create(struct cgroup_subsys *
mem->last_scanned_child = 0;
INIT_LIST_HEAD(&mem->oom_notify);
- if (parent)
+ if (parent) {
mem->swappiness = get_swappiness(parent);
+ mem_cgroup_dirty_param(&mem->dirty_param, parent);
+ } else {
+ /*
+ * The root cgroup dirty_param field is not used, instead,
+ * system-wide dirty limits are used.
+ */
+ }
atomic_set(&mem->refcnt, 1);
mem->move_charge_at_immigrate = 0;
mutex_init(&mem->thresholds_lock);
_
Patches currently in -mm which might be from gthelen@xxxxxxxxxx are
origin.patch
memcg-add-cgroupfs-interface-to-memcg-dirty-limits.patch
memcg-add-dirty-limiting-routines.patch
memcg-check-memcg-dirty-limits-in-page-writeback.patch
memcg-make-background-writeback-memcg-aware.patch
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