The patch titled
Subject: mm/damon/sysfs: implement a kdamond command for updating schemes' effective quotas
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-sysfs-implement-a-kdamond-command-for-updating-schemes-effective-quotas.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-sysfs-implement-a-kdamond-command-for-updating-schemes-effective-quotas.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/sysfs: implement a kdamond command for updating schemes' effective quotas
Date: Mon, 19 Feb 2024 11:44:14 -0800
Implement yet another kdamond 'state' file input command, namely
'update_schemes_effective_quotas'. If it is written, the
'effective_bytes' files of the kdamond will be updated to provide the
current effective size quota of each scheme in bytes.
Link: https://lkml.kernel.org/r/20240219194431.159606-4-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs-common.h | 4 ++++
mm/damon/sysfs-schemes.c | 20 ++++++++++++++++++++
mm/damon/sysfs.c | 32 ++++++++++++++++++++++++++++++++
3 files changed, 56 insertions(+)
--- a/mm/damon/sysfs.c~mm-damon-sysfs-implement-a-kdamond-command-for-updating-schemes-effective-quotas
+++ a/mm/damon/sysfs.c
@@ -1020,6 +1020,11 @@ enum damon_sysfs_cmd {
*/
DAMON_SYSFS_CMD_CLEAR_SCHEMES_TRIED_REGIONS,
/*
+ * @DAMON_SYSFS_CMD_UPDATE_SCHEMES_EFFECTIVE_QUOTAS: Update the
+ * effective size quota of the scheme in bytes.
+ */
+ DAMON_SYSFS_CMD_UPDATE_SCHEMES_EFFECTIVE_QUOTAS,
+ /*
* @NR_DAMON_SYSFS_CMDS: Total number of DAMON sysfs commands.
*/
NR_DAMON_SYSFS_CMDS,
@@ -1035,6 +1040,7 @@ static const char * const damon_sysfs_cm
"update_schemes_tried_bytes",
"update_schemes_tried_regions",
"clear_schemes_tried_regions",
+ "update_schemes_effective_quotas",
};
/*
@@ -1376,6 +1382,29 @@ static int damon_sysfs_commit_schemes_qu
}
/*
+ * damon_sysfs_upd_schemes_effective_quotas() - Update schemes effective quotas
+ * sysfs files.
+ * @kdamond: The kobject wrapper that associated to the kdamond thread.
+ *
+ * This function reads the schemes' effective quotas of specific kdamond and
+ * update the related values for sysfs files. This function should be called
+ * from DAMON callbacks while holding ``damon_syfs_lock``, to safely access the
+ * DAMON contexts-internal data and DAMON sysfs variables.
+ */
+static int damon_sysfs_upd_schemes_effective_quotas(
+ struct damon_sysfs_kdamond *kdamond)
+{
+ struct damon_ctx *ctx = kdamond->damon_ctx;
+
+ if (!ctx)
+ return -EINVAL;
+ damos_sysfs_update_effective_quotas(
+ kdamond->contexts->contexts_arr[0]->schemes, ctx);
+ return 0;
+}
+
+
+/*
* damon_sysfs_cmd_request_callback() - DAMON callback for handling requests.
* @c: The DAMON context of the callback.
* @active: Whether @c is not deactivated due to watermarks.
@@ -1437,6 +1466,9 @@ static int damon_sysfs_cmd_request_callb
case DAMON_SYSFS_CMD_CLEAR_SCHEMES_TRIED_REGIONS:
err = damon_sysfs_clear_schemes_regions(kdamond);
break;
+ case DAMON_SYSFS_CMD_UPDATE_SCHEMES_EFFECTIVE_QUOTAS:
+ err = damon_sysfs_upd_schemes_effective_quotas(kdamond);
+ break;
default:
break;
}
--- a/mm/damon/sysfs-common.h~mm-damon-sysfs-implement-a-kdamond-command-for-updating-schemes-effective-quotas
+++ a/mm/damon/sysfs-common.h
@@ -61,3 +61,7 @@ int damon_sysfs_schemes_clear_regions(
void damos_sysfs_set_quota_scores(struct damon_sysfs_schemes *sysfs_schemes,
struct damon_ctx *ctx);
+
+void damos_sysfs_update_effective_quotas(
+ struct damon_sysfs_schemes *sysfs_schemes,
+ struct damon_ctx *ctx);
--- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-implement-a-kdamond-command-for-updating-schemes-effective-quotas
+++ a/mm/damon/sysfs-schemes.c
@@ -1930,6 +1930,26 @@ void damos_sysfs_set_quota_scores(struct
}
}
+void damos_sysfs_update_effective_quotas(
+ struct damon_sysfs_schemes *sysfs_schemes,
+ struct damon_ctx *ctx)
+{
+ struct damos *scheme;
+ int schemes_idx = 0;
+
+ damon_for_each_scheme(scheme, ctx) {
+ struct damon_sysfs_quotas *sysfs_quotas;
+
+ /* user could have removed the scheme sysfs dir */
+ if (schemes_idx >= sysfs_schemes->nr)
+ break;
+
+ sysfs_quotas =
+ sysfs_schemes->schemes_arr[schemes_idx++]->quotas;
+ sysfs_quotas->effective_sz = scheme->quota.esz;
+ }
+}
+
static struct damos *damon_sysfs_mk_scheme(
struct damon_sysfs_scheme *sysfs_scheme)
{
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-core-check-apply-interval-in-damon_do_apply_schemes.patch
mm-damon-sysfs-schemes-handle-schemes-sysfs-dir-removal-before-commit_schemes_quota_goals.patch
mm-damon-reclaim-fix-quota-stauts-loss-due-to-online-tunings.patch
mm-damon-lru_sort-fix-quota-status-loss-due-to-online-tunings.patch
docs-admin-guide-mm-damon-usage-use-sysfs-interface-for-tracepoints-example.patch
mm-damon-rename-config_damon_dbgfs-to-damon_dbgfs_deprecated.patch
mm-damon-dbgfs-implement-deprecation-notice-file.patch
mm-damon-dbgfs-make-debugfs-interface-deprecation-message-a-macro.patch
docs-admin-guide-mm-damon-usage-document-deprecated-file-of-damon-debugfs-interface.patch
selftets-damon-prepare-for-monitor_on-file-renaming.patch
mm-damon-dbgfs-rename-monitor_on-file-to-monitor_on_deprecated.patch
docs-admin-guide-mm-damon-usage-update-for-monitor_on-renaming.patch
docs-translations-damon-usage-update-for-monitor_on-renaming.patch
mm-damon-sysfs-handle-state-file-inputs-for-every-sampling-interval-if-possible.patch
selftests-damon-_damon_sysfs-support-damos-quota.patch
selftests-damon-_damon_sysfs-support-damos-stats.patch
selftests-damon-_damon_sysfs-support-damos-apply-interval.patch
selftests-damon-add-a-test-for-damos-quota.patch
selftests-damon-add-a-test-for-damos-apply-intervals.patch
selftests-damon-add-a-test-for-a-race-between-target_ids_read-and-dbgfs_before_terminate.patch
selftests-damon-add-a-test-for-the-pid-leak-of-dbgfs_target_ids_write.patch
selftests-damon-_chk_dependency-get-debugfs-mount-point-from-proc-mounts.patch
docs-mm-damon-maintainer-profile-fix-reference-links-for-mm-stable-tree.patch
docs-mm-damon-move-the-list-of-damos-actions-to-design-doc.patch
docs-mm-damon-move-damon-operation-sets-list-from-the-usage-to-the-design-document.patch
docs-mm-damon-move-monitoring-target-regions-setup-detail-from-the-usage-to-the-design-document.patch
docs-admin-guide-mm-damon-usage-fix-wrong-quotas-diabling-condition.patch
mm-damon-core-set-damos_quota-esz-as-public-field-and-document.patch
mm-damon-sysfs-schemes-implement-quota-effective_bytes-file.patch
mm-damon-sysfs-implement-a-kdamond-command-for-updating-schemes-effective-quotas.patch
docs-abi-damon-document-effective_bytes-sysfs-file.patch
docs-admin-guide-mm-damon-usage-document-effective_bytes-file.patch
mm-damon-move-comments-and-fields-for-damos-quota-prioritization-to-the-end.patch
mm-damon-core-split-out-quota-goal-related-fields-to-a-struct.patch
mm-damon-core-add-multiple-goals-per-damos_quota-and-helpers-for-those.patch
mm-damon-sysfs-use-only-quota-goals.patch
mm-damon-core-remove-goal-field-of-damos_quota.patch
mm-damon-core-let-goal-specified-with-only-target-and-current-values.patch
mm-damon-core-support-multiple-metrics-for-quota-goal.patch
mm-damon-core-implement-psi-metric-damos-quota-goal.patch
mm-damon-sysfs-schemes-support-psi-based-quota-auto-tune.patch
docs-mm-damon-design-document-quota-goal-self-tuning.patch
docs-abi-damon-document-quota-goal-metric-file.patch
docs-admin-guide-mm-damon-usage-document-quota-goal-metric-file.patch
mm-damon-reclaim-implement-user-feedback-driven-quota-auto-tuning.patch
mm-damon-reclaim-implement-memory-psi-driven-quota-self-tuning.patch
docs-admin-guide-mm-damon-reclaim-document-auto-tuning-parameters.patch
