The patch titled
Subject: mm/damon/sysfs-schemes: support DAMOS apply interval
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-sysfs-schemes-support-damos-apply-interval.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-support-damos-apply-interval.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/sysfs-schemes: support DAMOS apply interval
Date: Sat, 16 Sep 2023 02:09:42 +0000
Update DAMON sysfs interface to support DAMOS apply intervals by adding a
new file, 'apply_interval_us' in each scheme directory. Users can set and
get the interval for each scheme in microseconds by writing to and reading
from the file.
Link: https://lkml.kernel.org/r/20230916020945.47296-7-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs-schemes.c | 38 +++++++++++++++++++++++++++++++++----
1 file changed, 34 insertions(+), 4 deletions(-)
--- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-support-damos-apply-interval
+++ a/mm/damon/sysfs-schemes.c
@@ -1121,6 +1121,7 @@ struct damon_sysfs_scheme {
struct kobject kobj;
enum damos_action action;
struct damon_sysfs_access_pattern *access_pattern;
+ unsigned long apply_interval_us;
struct damon_sysfs_quotas *quotas;
struct damon_sysfs_watermarks *watermarks;
struct damon_sysfs_scheme_filters *filters;
@@ -1141,7 +1142,7 @@ static const char * const damon_sysfs_da
};
static struct damon_sysfs_scheme *damon_sysfs_scheme_alloc(
- enum damos_action action)
+ enum damos_action action, unsigned long apply_interval_us)
{
struct damon_sysfs_scheme *scheme = kmalloc(sizeof(*scheme),
GFP_KERNEL);
@@ -1150,6 +1151,7 @@ static struct damon_sysfs_scheme *damon_
return NULL;
scheme->kobj = (struct kobject){};
scheme->action = action;
+ scheme->apply_interval_us = apply_interval_us;
return scheme;
}
@@ -1353,6 +1355,25 @@ static ssize_t action_store(struct kobje
return -EINVAL;
}
+static ssize_t apply_interval_us_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct damon_sysfs_scheme *scheme = container_of(kobj,
+ struct damon_sysfs_scheme, kobj);
+
+ return sysfs_emit(buf, "%lu\n", scheme->apply_interval_us);
+}
+
+static ssize_t apply_interval_us_store(struct kobject *kobj,
+ struct kobj_attribute *attr, const char *buf, size_t count)
+{
+ struct damon_sysfs_scheme *scheme = container_of(kobj,
+ struct damon_sysfs_scheme, kobj);
+ int err = kstrtoul(buf, 0, &scheme->apply_interval_us);
+
+ return err ? err : count;
+}
+
static void damon_sysfs_scheme_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_scheme, kobj));
@@ -1361,8 +1382,12 @@ static void damon_sysfs_scheme_release(s
static struct kobj_attribute damon_sysfs_scheme_action_attr =
__ATTR_RW_MODE(action, 0600);
+static struct kobj_attribute damon_sysfs_scheme_apply_interval_us_attr =
+ __ATTR_RW_MODE(apply_interval_us, 0600);
+
static struct attribute *damon_sysfs_scheme_attrs[] = {
&damon_sysfs_scheme_action_attr.attr,
+ &damon_sysfs_scheme_apply_interval_us_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_scheme);
@@ -1413,7 +1438,11 @@ static int damon_sysfs_schemes_add_dirs(
schemes->schemes_arr = schemes_arr;
for (i = 0; i < nr_schemes; i++) {
- scheme = damon_sysfs_scheme_alloc(DAMOS_STAT);
+ /*
+ * apply_interval_us as 0 means same to aggregation interval
+ * (same to before-apply_interval behavior)
+ */
+ scheme = damon_sysfs_scheme_alloc(DAMOS_STAT, 0);
if (!scheme) {
damon_sysfs_schemes_rm_dirs(schemes);
return -ENOMEM;
@@ -1610,8 +1639,8 @@ static struct damos *damon_sysfs_mk_sche
.low = sysfs_wmarks->low,
};
- scheme = damon_new_scheme(&pattern, sysfs_scheme->action, 0, "a,
- &wmarks);
+ scheme = damon_new_scheme(&pattern, sysfs_scheme->action,
+ sysfs_scheme->apply_interval_us, "a, &wmarks);
if (!scheme)
return NULL;
@@ -1641,6 +1670,7 @@ static void damon_sysfs_update_scheme(st
scheme->pattern.max_age_region = access_pattern->age->max;
scheme->action = sysfs_scheme->action;
+ scheme->apply_interval_us = sysfs_scheme->apply_interval_us;
scheme->quota.ms = sysfs_quotas->ms;
scheme->quota.sz = sysfs_quotas->sz;
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
docs-admin-guide-mm-damon-usage-fixup-missed-ref-keyword.patch
docs-admin-guide-mm-damon-usage-place-debugfs-usage-at-the-bottom.patch
docs-admin-guide-mm-damon-usage-move-debugfs-intro-to-the-bottom-of-the-section.patch
docs-mm-damon-design-explicitly-introduce-nr_accesses.patch
docs-admin-guide-mm-damon-usage-explain-the-format-of-damon_aggregate-tracepoint.patch
docs-mm-damon-design-add-a-section-for-kdamond-and-damon-context.patch
docs-admin-guide-mm-damon-usage-link-design-doc-for-details-of-kdamond-and-context.patch
mm-damon-core-fix-a-comment-about-damon_set_attrs-call-timings.patch
mm-damon-core-add-more-comments-for-nr_accesses.patch
mm-damon-core-remove-duplicated-comment-for-watermarks-based-deactivation.patch
mm-damon-core-remove-struct-target-parameter-from-damon_aggregated-tracepoint.patch
mm-damon-core-add-a-tracepoint-for-damos-apply-target-regions.patch
docs-admin-guide-mm-damon-usage-document-damos_before_apply-tracepoint.patch
mm-damon-core-use-number-of-passed-access-sampling-as-a-timer.patch
mm-damon-core-define-and-use-a-dedicated-function-for-region-access-rate-update.patch
mm-damon-vaddr-call-damon_update_region_access_rate-always.patch
mm-damon-core-implement-a-pseudo-moving-sum-function.patch
mm-damon-core-test-add-a-unit-test-for-damon_moving_sum.patch
mm-damon-core-introduce-nr_accesses_bp.patch
mm-damon-core-use-pseudo-moving-sum-for-nr_accesses_bp.patch
mm-damon-core-skip-updating-nr_accesses_bp-for-each-aggregation-interval.patch
mm-damon-core-mark-damon_moving_sum-as-a-static-function.patch
mm-damon-core-make-damos-uses-nr_accesses_bp-instead-of-nr_accesses.patch
mm-damon-sysfs-schemes-use-nr_accesses_bp-as-the-source-of-tried_regions-n-nr_accesses.patch
mm-damon-core-use-nr_accesses_bp-as-a-source-of-damos_before_apply-tracepoint.patch
mm-damon-core-implement-scheme-specific-apply-interval.patch
docs-mm-damon-design-document-damos-apply-intervals.patch
mm-damon-sysfs-schemes-support-damos-apply-interval.patch
selftests-damon-sysfs-test-damos-apply-intervals.patch
docs-admin-guide-mm-damon-usage-update-for-damos-apply-intervals.patch
docs-abi-damon-update-for-damos-apply-intervals.patch
