The quilt patch titled
Subject: mm/damon/reclaim: implement memory PSI-driven quota self-tuning
has been removed from the -mm tree. Its filename was
mm-damon-reclaim-implement-memory-psi-driven-quota-self-tuning.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/reclaim: implement memory PSI-driven quota self-tuning
Date: Mon, 19 Feb 2024 11:44:30 -0800
Support the PSI-driven quota self-tuning from DAMON_RECLAIM by introducing
yet another parameter, 'quota_mem_pressure_us'. Users can set the desired
amount of memory pressure stall time per each quota reset interval using
the parameter. Then DAMON_RECLAIM monitor the memory pressure stall time,
specifically system-wide memory 'some' PSI value that increased during the
given time interval, and self-tune the quota using the DAMOS core logic.
Link: https://lkml.kernel.org/r/20240219194431.159606-20-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/reclaim.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
--- a/mm/damon/reclaim.c~mm-damon-reclaim-implement-memory-psi-driven-quota-self-tuning
+++ a/mm/damon/reclaim.c
@@ -63,6 +63,21 @@ static struct damos_quota damon_reclaim_
DEFINE_DAMON_MODULES_DAMOS_QUOTAS(damon_reclaim_quota);
/*
+ * Desired level of memory pressure-stall time in microseconds.
+ *
+ * While keeping the caps that set by other quotas, DAMON_RECLAIM automatically
+ * increases and decreases the effective level of the quota aiming this level of
+ * memory pressure is incurred. System-wide ``some`` memory PSI in microseconds
+ * per quota reset interval (``quota_reset_interval_ms``) is collected and
+ * compared to this value to see if the aim is satisfied. Value zero means
+ * disabling this auto-tuning feature.
+ *
+ * Disabled by default.
+ */
+static unsigned long quota_mem_pressure_us __read_mostly;
+module_param(quota_mem_pressure_us, ulong, 0600);
+
+/*
* User-specifiable feedback for auto-tuning of the effective quota.
*
* While keeping the caps that set by other quotas, DAMON_RECLAIM automatically
@@ -198,6 +213,16 @@ static int damon_reclaim_apply_parameter
&old_scheme->quota);
}
+ if (quota_mem_pressure_us) {
+ goal = damos_new_quota_goal(DAMOS_QUOTA_SOME_MEM_PSI_US,
+ quota_mem_pressure_us);
+ if (!goal) {
+ damon_destroy_scheme(scheme);
+ return -ENOMEM;
+ }
+ damos_add_quota_goal(&scheme->quota, goal);
+ }
+
if (quota_autotune_feedback) {
goal = damos_new_quota_goal(DAMOS_QUOTA_USER_INPUT, 10000);
if (!goal) {
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
