The patch titled
Subject: mm/damon/sysfs-schemes: implement scheme region directory
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-sysfs-schemes-implement-scheme-region-directory.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-scheme-region-directory.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 scheme region directory
Date: Tue, 1 Nov 2022 22:03:23 +0000
Implement region directories under 'tried_regions' directory of each
scheme DAMON sysfs directory. This directory will provide the address
range, the monitored access frequency ('nr_accesses'), and the age of each
DAMON region that corresponding DAMON-based operation scheme has tried to
be applied. Note that this commit doesn't implement the code for filling
the data but only the sysfs directory.
Link: https://lkml.kernel.org/r/20221101220328.95765-4-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-schemes.c | 123 ++++++++++++++++++++++++++++++++++++-
1 file changed, 122 insertions(+), 1 deletion(-)
--- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-implement-scheme-region-directory
+++ a/mm/damon/sysfs-schemes.c
@@ -10,17 +10,137 @@
#include "sysfs-common.h"
/*
+ * scheme region directory
+ */
+
+struct damon_sysfs_scheme_region {
+ struct kobject kobj;
+ struct damon_addr_range ar;
+ unsigned int nr_accesses;
+ unsigned int age;
+ struct list_head list;
+};
+
+static struct damon_sysfs_scheme_region *damon_sysfs_scheme_region_alloc(
+ struct damon_region *region)
+{
+ struct damon_sysfs_scheme_region *sysfs_region = kmalloc(
+ sizeof(*sysfs_region), GFP_KERNEL);
+
+ if (!sysfs_region)
+ return NULL;
+ sysfs_region->kobj = (struct kobject){};
+ sysfs_region->ar = region->ar;
+ sysfs_region->nr_accesses = region->nr_accesses;
+ sysfs_region->age = region->age;
+ INIT_LIST_HEAD(&sysfs_region->list);
+ return sysfs_region;
+}
+
+static ssize_t start_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%lu\n", region->ar.start);
+}
+
+static ssize_t end_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%lu\n", region->ar.end);
+}
+
+static ssize_t nr_accesses_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%u\n", region->nr_accesses);
+}
+
+static ssize_t age_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%u\n", region->age);
+}
+
+static void damon_sysfs_scheme_region_release(struct kobject *kobj)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ list_del(®ion->list);
+ kfree(region);
+}
+
+static struct kobj_attribute damon_sysfs_scheme_region_start_attr =
+ __ATTR_RO_MODE(start, 0400);
+
+static struct kobj_attribute damon_sysfs_scheme_region_end_attr =
+ __ATTR_RO_MODE(end, 0400);
+
+static struct kobj_attribute damon_sysfs_scheme_region_nr_accesses_attr =
+ __ATTR_RO_MODE(nr_accesses, 0400);
+
+static struct kobj_attribute damon_sysfs_scheme_region_age_attr =
+ __ATTR_RO_MODE(age, 0400);
+
+static struct attribute *damon_sysfs_scheme_region_attrs[] = {
+ &damon_sysfs_scheme_region_start_attr.attr,
+ &damon_sysfs_scheme_region_end_attr.attr,
+ &damon_sysfs_scheme_region_nr_accesses_attr.attr,
+ &damon_sysfs_scheme_region_age_attr.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(damon_sysfs_scheme_region);
+
+static struct kobj_type damon_sysfs_scheme_region_ktype = {
+ .release = damon_sysfs_scheme_region_release,
+ .sysfs_ops = &kobj_sysfs_ops,
+ .default_groups = damon_sysfs_scheme_region_groups,
+};
+
+/*
* scheme regions directory
*/
struct damon_sysfs_scheme_regions {
struct kobject kobj;
+ struct list_head regions_list;
+ int nr_regions;
};
static struct damon_sysfs_scheme_regions *
damon_sysfs_scheme_regions_alloc(void)
{
- return kzalloc(sizeof(struct damon_sysfs_scheme_regions), GFP_KERNEL);
+ struct damon_sysfs_scheme_regions *regions = kmalloc(sizeof(*regions),
+ GFP_KERNEL);
+
+ regions->kobj = (struct kobject){};
+ INIT_LIST_HEAD(®ions->regions_list);
+ regions->nr_regions = 0;
+ return regions;
+}
+
+static void damon_sysfs_scheme_regions_rm_dirs(
+ struct damon_sysfs_scheme_regions *regions)
+{
+ struct damon_sysfs_scheme_region *r, *next;
+
+ list_for_each_entry_safe(r, next, ®ions->regions_list, list) {
+ /* release function deletes it from the list */
+ kobject_put(&r->kobj);
+ regions->nr_regions--;
+ }
}
static void damon_sysfs_scheme_regions_release(struct kobject *kobj)
@@ -837,6 +957,7 @@ static void damon_sysfs_scheme_rm_dirs(s
kobject_put(&scheme->quotas->kobj);
kobject_put(&scheme->watermarks->kobj);
kobject_put(&scheme->stats->kobj);
+ damon_sysfs_scheme_regions_rm_dirs(scheme->tried_regions);
kobject_put(&scheme->tried_regions->kobj);
}
_
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
