From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 257B822B8AB for ; Tue, 19 May 2026 00:55:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779152144; cv=none; b=oyKXR82q9cEQHFrsTeWE+bUcHiOXFU6hoLnFl++Ki5+Q4lFr9fezbNwOgUHMrDf4xNjA2ekJDCRobcPZ5bvIsYCuTu0cRHj9074xrlVSGNducJWSDkptgBEI03lcQYnag5RxwHGgbBVAkuZTr0Iyp1O+2uE/7D5+JqZ53LybEZg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779152144; c=relaxed/simple; bh=AuqvLftD1ROahxLdyOjkFwxlYA+GxY1D34kx2moovE0=; h=Date:To:From:Subject:Message-Id; b=iDEOMcou8q+fF4BBv19D/FVh4kcMuYkl4e7U2bSID8Oh8ssxP87YuJVEerBnYFbVzz/2CSW1NBi7fK1sJTjuiMuQShC4Swbf+6z6jVHzAhOftDhyguBePG3P+kRuMc6m6SWx9dHxULdmDTZTQ9B3R1yfUIIQDk+7UStyBJVox7c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=vrowcJCn; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="vrowcJCn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC5DEC2BCB7; Tue, 19 May 2026 00:55:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1779152143; bh=AuqvLftD1ROahxLdyOjkFwxlYA+GxY1D34kx2moovE0=; h=Date:To:From:Subject:From; b=vrowcJCnTjZs53JmHOoY1K0khzIGFP0d7qw00x97qvzdYGwIO6OyOuefYndXEKl+v bf++3hbujAidSAD8JFEfUNi4feukMIumDeIF1M894bm2TbbgEj+5zvragwIJxgMrXv 10G5Ct/boDIJ4ERS8i4h5WZ5Bd8dXc7eVxHG0Sqg= Date: Mon, 18 May 2026 17:55:43 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-sysfs-schemes-implement-probe-hits-file.patch added to mm-new branch Message-Id: <20260519005543.BC5DEC2BCB7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/damon/sysfs-schemes: implement probe/hits file has been added to the -mm mm-new branch. Its filename is mm-damon-sysfs-schemes-implement-probe-hits-file.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-probe-hits-file.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next 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 various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: SeongJae Park Subject: mm/damon/sysfs-schemes: implement probe/hits file Date: Mon, 18 May 2026 16:41:05 -0700 Implement sysfs file for showing the per-region per-probe hits count. Link: https://lore.kernel.org/20260518234119.97569-18-sj@kernel.org Signed-off-by: SeongJae Park Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: "Masami Hiramatsu (Google)" Cc: Mathieu Desnoyers Cc: Michal Hocko Cc: Mike Rapoport Cc: Shuah Khan Cc: Steven Rostedt Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- mm/damon/sysfs-schemes.c | 41 ++++++++++++++++++++++++++++++------- 1 file changed, 34 insertions(+), 7 deletions(-) --- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-implement-probe-hits-file +++ a/mm/damon/sysfs-schemes.c @@ -16,11 +16,27 @@ struct damos_sysfs_probe { struct kobject kobj; + unsigned char hits; }; -static struct damos_sysfs_probe *damos_sysfs_probe_alloc(void) +static struct damos_sysfs_probe *damos_sysfs_probe_alloc(unsigned char hits) { - return kzalloc_obj(struct damos_sysfs_probe); + struct damos_sysfs_probe *probe; + + probe = kzalloc_obj(*probe); + if (!probe) + return NULL; + probe->hits = hits; + return probe; +} + +static ssize_t hits_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct damos_sysfs_probe *probe = container_of(kobj, + struct damos_sysfs_probe, kobj); + + return sysfs_emit(buf, "%hhu\n", probe->hits); } static void damos_sysfs_probe_release(struct kobject *kobj) @@ -31,9 +47,19 @@ static void damos_sysfs_probe_release(st kfree(probe); } +static struct kobj_attribute damos_sysfs_probe_hits_attr = + __ATTR_RO_MODE(hits, 0400); + +static struct attribute *damos_sysfs_probe_attrs[] = { + &damos_sysfs_probe_hits_attr.attr, + NULL, +}; +ATTRIBUTE_GROUPS(damos_sysfs_probe); + static const struct kobj_type damos_sysfs_probe_ktype = { .release = damos_sysfs_probe_release, .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damos_sysfs_probe_groups, }; /* @@ -64,7 +90,7 @@ static void damos_sysfs_probes_rm_dirs(s } static int damos_sysfs_probes_add_dirs(struct damos_sysfs_probes *probes, - struct damon_ctx *ctx) + struct damon_ctx *ctx, struct damon_region *region) { struct damon_probe *probe; struct damos_sysfs_probe **probes_arr; @@ -86,7 +112,7 @@ static int damos_sysfs_probes_add_dirs(s struct damos_sysfs_probe *sys_probe; int err; - sys_probe = damos_sysfs_probe_alloc(); + sys_probe = damos_sysfs_probe_alloc(region->probe_hits[i]); if (!sys_probe) { damos_sysfs_probes_rm_dirs(probes); return -ENOMEM; @@ -150,7 +176,8 @@ static struct damon_sysfs_scheme_region static int damos_sysfs_region_add_dirs( struct damon_sysfs_scheme_region *region, - struct damon_ctx *ctx) + struct damon_ctx *ctx, + struct damon_region *dregion) { struct damos_sysfs_probes *probes = damos_sysfs_probes_alloc(); int err; @@ -161,7 +188,7 @@ static int damos_sysfs_region_add_dirs( ®ion->kobj, "probes"); if (err) goto fail; - err = damos_sysfs_probes_add_dirs(probes, ctx); + err = damos_sysfs_probes_add_dirs(probes, ctx, dregion); if (err) goto fail; @@ -3143,7 +3170,7 @@ void damos_sysfs_populate_region_dir(str &sysfs_regions->kobj, "%d", sysfs_regions->nr_regions)) goto out; - if (damos_sysfs_region_add_dirs(region, ctx)) + if (damos_sysfs_region_add_dirs(region, ctx, r)) goto out; list_add_tail(®ion->list, &sysfs_regions->regions_list); _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-sysfs-schemes-delete-tried-region-in-regions_rmdirs.patch mm-damon-core-make-charge_addr_from-aware-of-end-address-exclusivity.patch mm-damon-core-handle-min_region_sz-remaining-quota-as-empty.patch mm-damon-core-merge-regions-after-applying-damos-schemes.patch mm-damon-core-introduce-failed-region-quota-charge-ratio.patch mm-damon-sysfs-schemes-implement-fail_charge_numdenom-files.patch docs-mm-damon-design-document-fail_charge_numdenom.patch docs-admin-guide-mm-damon-usage-document-fail_charge_numdenom-files.patch docs-abi-damon-document-fail_charge_numdenom.patch mm-damon-tests-core-kunit-test-fail_charge_numdenom-committing.patch selftests-damon-_damon_sysfs-support-failed-region-quota-charge-ratio.patch selftests-damon-drgn_dump_damon_status-support-failed-region-quota-charge-ratio.patch selftests-damon-sysfspy-test-failed-region-quota-charge-ratio.patch docs-mm-damon-maintainer-profile-add-ai-review-usage-guideline.patch mm-damon-core-introduce-damon_ctx-paused.patch mm-damon-sysfs-add-pause-file-under-context-dir.patch docs-mm-damon-design-update-for-context-pause-resume-feature.patch docs-admin-guide-mm-damon-usage-update-for-pause-file.patch docs-abi-damon-update-for-pause-sysfs-file.patch mm-damon-tests-core-kunit-test-pause-commitment.patch selftests-damon-_damon_sysfs-support-pause-file-staging.patch selftests-damon-drgn_dump_damon_status-dump-pause.patch selftests-damon-sysfspy-check-pause-on-assert_ctx_committed.patch selftests-damon-sysfspy-pause-damon-before-dumping-status.patch mm-damon-introduce-damon_set_region_system_rams_default.patch mm-damon-reclaim-cover-all-system-rams.patch mm-damon-lru_sort-cover-all-system-rams.patch mm-damon-core-remove-damon_set_region_biggest_system_ram_default.patch mm-damon-stat-use-damon_set_region_system_rams_default.patch docs-admin-guide-mm-damon-reclaim-update-for-entire-memory-monitoring.patch docs-admin-guide-mm-damon-lru_sort-update-for-entire-memory-monitoring.patch docs-admin-guide-mm-damon-usage-mark-scheme-filters-sysfs-dir-as-deprecated.patch docs-abi-damon-mark-schemes-s-filters-deprecated.patch mm-damon-reclaim-add-autotune_monitoring_intervals-parameter.patch docs-admin-guide-mm-damon-reclaim-update-for-autotune_monitoring_intervals.patch mm-damon-stat-add-a-parameter-for-reading-kdamond-pid.patch docs-admin-guide-mm-damon-stat-document-kdamond_pid-parameter.patch mm-damon-core-introduce-struct-damon_probe.patch mm-damon-core-embed-damon_probe-objects-in-damon_ctx.patch mm-damon-core-introduce-damon_filter.patch mm-damon-core-commit-probes.patch mm-damon-core-introduce-damon_region-probe_hits.patch mm-damon-core-introduce-damon_ops-apply_probes.patch mm-damon-core-do-data-attributes-monitoring.patch mm-damon-paddr-support-data-attributes-monitoring.patch mm-damon-sysfs-implement-probes-dir.patch mm-damon-sysfs-implement-probe-dir.patch mm-damon-sysfs-implement-filters-directory.patch mm-damon-sysfs-implement-filter-dir.patch mm-damon-sysfs-implement-filter-dir-files.patch mm-damon-sysfs-setup-probes-on-damon-core-api-parameters.patch mm-damon-sysfs-schemes-implement-tried_regions-r-probes.patch mm-damon-sysfs-schemes-implement-probe-dir.patch mm-damon-sysfs-schemes-implement-probe-hits-file.patch mm-damon-trace-probe_hits.patch selftests-damon-sysfssh-test-probes-dir.patch docs-mm-damon-design-document-data-attributes-monitoring.patch docs-admin-guide-mm-damon-usage-document-data-attributes-monitoring.patch mm-damon-core-introduce-damon_filter_type_memcg.patch mm-damon-paddr-support-damon_filter_type_memcg.patch mm-damon-sysfs-add-filters-f-path-file.patch mm-damon-sysfs-schemes-move-memcg_path_to_id-to-sysfs-common.patch mm-damon-sysfs-setup-damon_filter-memcg_id-from-path.patch docs-mm-damon-design-update-for-memcg-damon-filter.patch docs-admin-guide-mm-damon-usage-update-for-memcg-damon-filter.patch