The patch titled
Subject: mm/damon/sysfs-schemes: implement DAMOS-tried regions clear command
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-sysfs-schemes-implement-damos-tried-regions-clear-command.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-schemes-implement-damos-tried-regions-clear-command.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-schemes: implement DAMOS-tried regions clear command
Date: Tue, 1 Nov 2022 22:03:25 +0000
When there are huge number of DAMON regions that specific scheme actions
are tried to be applied, directories and files under 'tried_regions'
scheme directory could waste some memory. Add another special input
keyword ('clear_schemes_tried_regions') for 'state' file of each kdamond
sysfs directory that can be used for cleanup of the 'tried_regions'
sub-directories.
Link: https://lkml.kernel.org/r/20221101220328.95765-6-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs-common.h | 4 ++++
mm/damon/sysfs-schemes.c | 10 +++++++++-
mm/damon/sysfs.c | 20 ++++++++++++++++++++
3 files changed, 33 insertions(+), 1 deletion(-)
--- a/mm/damon/sysfs.c~mm-damon-sysfs-schemes-implement-damos-tried-regions-clear-command
+++ a/mm/damon/sysfs.c
@@ -1005,6 +1005,11 @@ enum damon_sysfs_cmd {
*/
DAMON_SYSFS_CMD_UPDATE_SCHEMES_TRIED_REGIONS,
/*
+ * @DAMON_SYSFS_CMD_CLEAR_SCHEMES_TRIED_REGIONS: Clear schemes tried
+ * regions
+ */
+ DAMON_SYSFS_CMD_CLEAR_SCHEMES_TRIED_REGIONS,
+ /*
* @NR_DAMON_SYSFS_CMDS: Total number of DAMON sysfs commands.
*/
NR_DAMON_SYSFS_CMDS,
@@ -1017,6 +1022,7 @@ static const char * const damon_sysfs_cm
"commit",
"update_schemes_stats",
"update_schemes_tried_regions",
+ "clear_schemes_tried_regions",
};
/*
@@ -1262,6 +1268,17 @@ static int damon_sysfs_upd_schemes_regio
return damon_sysfs_schemes_update_regions_stop(ctx);
}
+static int damon_sysfs_clear_schemes_regions(
+ struct damon_sysfs_kdamond *kdamond)
+{
+ struct damon_ctx *ctx = kdamond->damon_ctx;
+
+ if (!ctx)
+ return -EINVAL;
+ return damon_sysfs_schemes_clear_regions(
+ kdamond->contexts->contexts_arr[0]->schemes, ctx);
+}
+
static inline bool damon_sysfs_kdamond_running(
struct damon_sysfs_kdamond *kdamond)
{
@@ -1343,6 +1360,9 @@ static int damon_sysfs_cmd_request_callb
damon_sysfs_schemes_regions_updating = false;
}
break;
+ case DAMON_SYSFS_CMD_CLEAR_SCHEMES_TRIED_REGIONS:
+ err = damon_sysfs_clear_schemes_regions(kdamond);
+ break;
default:
break;
}
--- a/mm/damon/sysfs-common.h~mm-damon-sysfs-schemes-implement-damos-tried-regions-clear-command
+++ a/mm/damon/sysfs-common.h
@@ -50,3 +50,7 @@ int damon_sysfs_schemes_update_regions_s
struct damon_ctx *ctx);
int damon_sysfs_schemes_update_regions_stop(struct damon_ctx *ctx);
+
+int damon_sysfs_schemes_clear_regions(
+ struct damon_sysfs_schemes *sysfs_schemes,
+ struct damon_ctx *ctx);
--- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-implement-damos-tried-regions-clear-command
+++ a/mm/damon/sysfs-schemes.c
@@ -1241,7 +1241,7 @@ static int damon_sysfs_before_damos_appl
}
/* Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock */
-int damon_sysfs_schemes_update_regions_start(
+int damon_sysfs_schemes_clear_regions(
struct damon_sysfs_schemes *sysfs_schemes,
struct damon_ctx *ctx)
{
@@ -1255,7 +1255,15 @@ int damon_sysfs_schemes_update_regions_s
damon_sysfs_scheme_regions_rm_dirs(
sysfs_scheme->tried_regions);
}
+ return 0;
+}
+/* Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock */
+int damon_sysfs_schemes_update_regions_start(
+ struct damon_sysfs_schemes *sysfs_schemes,
+ struct damon_ctx *ctx)
+{
+ damon_sysfs_schemes_clear_regions(sysfs_schemes, ctx);
damon_sysfs_schemes_for_damos_callback = sysfs_schemes;
ctx->callback.before_damos_apply = damon_sysfs_before_damos_apply;
return 0;
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-core-split-out-damos-charged-region-skip-logic-into-a-new-function.patch
mm-damon-core-split-damos-application-logic-into-a-new-function.patch
mm-damon-core-split-out-scheme-stat-update-logic-into-a-new-function.patch
mm-damon-core-split-out-scheme-quota-adjustment-logic-into-a-new-function.patch
mm-damon-sysfs-use-damon_addr_range-for-regions-start-and-end-values.patch
mm-damon-sysfs-remove-parameters-of-damon_sysfs_region_alloc.patch
mm-damon-sysfs-move-sysfs_lock-to-common-module.patch
mm-damon-sysfs-move-unsigned-long-range-directory-to-common-module.patch
mm-damon-sysfs-split-out-kdamond-independent-schemes-stats-update-logic-into-a-new-function.patch
mm-damon-sysfs-split-out-schemes-directory-implementation-to-separate-file.patch
mm-damon-modules-deduplicate-init-steps-for-damon-context-setup.patch
mm-damon-reclaimlru_sort-remove-unnecessarily-included-headers.patch
mm-damon-reclaim-enable-and-disable-synchronously.patch
selftests-damon-add-tests-for-damon_reclaims-enabled-parameter.patch
mm-damon-lru_sort-enable-and-disable-synchronously.patch
selftests-damon-add-tests-for-damon_lru_sorts-enabled-parameter.patch
docs-admin-guide-mm-damon-usage-describe-the-rules-of-sysfs-region-directories.patch
docs-admin-guide-mm-damon-usage-fix-wrong-usage-example-of-init_regions-file.patch
mm-damon-core-add-a-callback-for-scheme-target-regions-check.patch
mm-damon-sysfs-schemes-implement-schemes-tried_regions-directory.patch
mm-damon-sysfs-schemes-implement-scheme-region-directory.patch
mm-damon-sysfs-implement-damos-tried-regions-update-command.patch
mm-damon-sysfs-schemes-implement-damos-tried-regions-clear-command.patch
tools-selftets-damon-sysfs-test-tried_regions-directory-existence.patch
docs-admin-guide-mm-damon-usage-document-schemes-s-tried_regions-sysfs-directory.patch
docs-abi-damon-document-schemes-s-tried_regions-sysfs-directory.patch
