+ mm-damon-sysfs-schemes-use-nr_accesses_bp-as-the-source-of-tried_regions-n-nr_accesses.patch added to mm-unstable branch

+ mm-damon-sysfs-schemes-use-nr_accesses_bp-as-the-source-of-tried_regions-n-nr_accesses.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/damon/sysfs-schemes: use nr_accesses_bp as the source of tried_regions/<N>/nr_accesses
has been added to the -mm mm-unstable branch.  Its filename is
     mm-damon-sysfs-schemes-use-nr_accesses_bp-as-the-source-of-tried_regions-n-nr_accesses.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-use-nr_accesses_bp-as-the-source-of-tried_regions-n-nr_accesses.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@kernel.org>
Subject: mm/damon/sysfs-schemes: use nr_accesses_bp as the source of tried_regions/<N>/nr_accesses
Date: Sat, 16 Sep 2023 02:09:38 +0000

DAMON sysfs interface exposes access rate of each region via DAMOS tried
regions directory.  For this, the nr_accesses field of the region is used.
DAMOS was actually using nr_accesses in the past, but it uses
nr_accesses_bp now.  Use the value that it is really using as the source.

Note that this doesn't expose nr_accesses_bp as is (in basis point), but
after converting it to the natural number by dividing the value by 10,000.
Hence there is no behavioral change from users' perspective.

Link: https://lkml.kernel.org/r/20230916020945.47296-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/sysfs-schemes.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-use-nr_accesses_bp-as-the-source-of-tried_regions-n-nr_accesses
+++ a/mm/damon/sysfs-schemes.c
@@ -31,7 +31,7 @@ static struct damon_sysfs_scheme_region
 		return NULL;
 	sysfs_region->kobj = (struct kobject){};
 	sysfs_region->ar = region->ar;
-	sysfs_region->nr_accesses = region->nr_accesses;
+	sysfs_region->nr_accesses = region->nr_accesses_bp / 10000;
 	sysfs_region->age = region->age;
 	INIT_LIST_HEAD(&sysfs_region->list);
 	return sysfs_region;
_

Patches currently in -mm which might be from sj@kernel.org 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