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mm/damon: add DAMOS quota goal type for per-memcg per-node memory usage

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Define a new DAMOS quota auto-tuning target metric for per-cgroup per-node
memory usage.  For specifying the cgroup of the interest, add a field,
namely memcg_id, to damos_quota_goal struct.

Note that this commit is only implementing the interface.  The handling of
the interface (the metric value calculation) will be implemented in the
following commit.

Link: https://lkml.kernel.org/r/20251017212706.183502-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2025-10-17 14:26:54 -07:00
committed by Andrew Morton
parent d3946c5f4c
commit 6a18bbe483
1 changed files with 10 additions and 1 deletions
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11
include/linux/damon.h
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@@ -147,6 +147,7 @@ enum damos_action {
* @DAMOS_QUOTA_SOME_MEM_PSI_US: System level some memory PSI in us.
* @DAMOS_QUOTA_NODE_MEM_USED_BP: MemUsed ratio of a node.
* @DAMOS_QUOTA_NODE_MEM_FREE_BP: MemFree ratio of a node.
* @DAMOS_QUOTA_NODE_MEMCG_USED_BP: MemUsed ratio of a node for a cgroup.
* @NR_DAMOS_QUOTA_GOAL_METRICS: Number of DAMOS quota goal metrics.
*
* Metrics equal to larger than @NR_DAMOS_QUOTA_GOAL_METRICS are unsupported.
@@ -156,6 +157,7 @@ enum damos_quota_goal_metric {
DAMOS_QUOTA_SOME_MEM_PSI_US,
DAMOS_QUOTA_NODE_MEM_USED_BP,
DAMOS_QUOTA_NODE_MEM_FREE_BP,
DAMOS_QUOTA_NODE_MEMCG_USED_BP,
NR_DAMOS_QUOTA_GOAL_METRICS,
};
@@ -166,6 +168,7 @@ enum damos_quota_goal_metric {
* @current_value: Current value of @metric.
* @last_psi_total: Last measured total PSI
* @nid: Node id.
* @memcg_id: Memcg id.
* @list: List head for siblings.
*
* Data structure for getting the current score of the quota tuning goal. The
@@ -179,6 +182,9 @@ enum damos_quota_goal_metric {
*
* If @metric is DAMOS_QUOTA_NODE_MEM_{USED,FREE}_BP, @nid represents the node
* id of the target node to account the used/free memory.
*
* If @metric is DAMOS_QUOTA_NODE_MEMCG_USED_BP, @nid and @memcg_id represents
* the node id and the cgroup to account the used memory for.
*/
struct damos_quota_goal {
enum damos_quota_goal_metric metric;
@@ -187,7 +193,10 @@ struct damos_quota_goal {
/* metric-dependent fields */
union {
u64 last_psi_total;
int nid;
struct {
int nid;
unsigned short memcg_id;
};
};
struct list_head list;
};