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 D4BC8282F25 for ; Tue, 19 May 2026 00:55:41 +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=1779152141; cv=none; b=MDH+t3x00A78Tmecrl7ItX3AhitrMlYRIyergWwdvzFBnlN/rmjmlS8z+zE0sl+owW0GS8t/y0xsTrbvB1e1ELNIKTld5Ha5yMRgd9EjzquEIIsxnp1I7RIBCfQGdS6Ukad1Ke+5WxZ1Q6Nm1/sctB+B2yoZhcguuCSW2PyAX0o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779152141; c=relaxed/simple; bh=4bs5+1t9v+H3gWsrxxZepiM434Sy+/gWt9kpgdbRkYg=; h=Date:To:From:Subject:Message-Id; b=YP0qp2H8lfWY3iRiE6l4zMuEPQJH5kO0qxpgXEaFuUjllheL6/CZrd9+Hh0CMHeD4R5gNaUhzBAuya95Wgr0zqmkRZkeWlxFReRCtbSjP3ahpoKBdf8ZsawBDJV8C8hA1eE7KZcZC/4pqDj5Ib5RMuvucAxet5h4FITy1qjTx/U= 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=mbqNG7W8; 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="mbqNG7W8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7BA16C2BCB7; Tue, 19 May 2026 00:55:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1779152141; bh=4bs5+1t9v+H3gWsrxxZepiM434Sy+/gWt9kpgdbRkYg=; h=Date:To:From:Subject:From; b=mbqNG7W82YX/dovuwKwBEtJrM9NG/sv3ZWlYtfkBG7RAj7h8OMEa3UsRTHnl+Dx3T vrAOIrtX8yBGfnMqL09b+JtknfnXTnhH+PSWVmwnr3y5Qd6lOSDRWWm2wwbKTtQ0LN F4khUZsWE42PTZ8mXyGrqi1mjbVbZe1/1kEE53Uo= Date: Mon, 18 May 2026 17:55:40 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-sysfs-schemes-implement-probe-dir.patch added to mm-new branch Message-Id: <20260519005541.7BA16C2BCB7@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 dir has been added to the -mm mm-new branch. Its filename is mm-damon-sysfs-schemes-implement-probe-dir.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-dir.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 dir Date: Mon, 18 May 2026 16:41:04 -0700 Implement sysfs directory for showing per-probe hits count of each region. Link: https://lore.kernel.org/20260518234119.97569-17-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 | 101 ++++++++++++++++++++++++++++++++++--- 1 file changed, 95 insertions(+), 6 deletions(-) --- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-implement-probe-dir +++ a/mm/damon/sysfs-schemes.c @@ -11,11 +11,39 @@ #include "sysfs-common.h" /* + * probe directory + */ + +struct damos_sysfs_probe { + struct kobject kobj; +}; + +static struct damos_sysfs_probe *damos_sysfs_probe_alloc(void) +{ + return kzalloc_obj(struct damos_sysfs_probe); +} + +static void damos_sysfs_probe_release(struct kobject *kobj) +{ + struct damos_sysfs_probe *probe = container_of(kobj, + struct damos_sysfs_probe, kobj); + + kfree(probe); +} + +static const struct kobj_type damos_sysfs_probe_ktype = { + .release = damos_sysfs_probe_release, + .sysfs_ops = &kobj_sysfs_ops, +}; + +/* * probes directory */ struct damos_sysfs_probes { struct kobject kobj; + struct damos_sysfs_probe **probes_arr; + int nr; }; static struct damos_sysfs_probes *damos_sysfs_probes_alloc(void) @@ -23,6 +51,60 @@ static struct damos_sysfs_probes *damos_ return kzalloc_obj(struct damos_sysfs_probes); } +static void damos_sysfs_probes_rm_dirs(struct damos_sysfs_probes *probes) +{ + struct damos_sysfs_probe **probes_arr = probes->probes_arr; + int i; + + for (i = 0; i < probes->nr; i++) + kobject_put(&probes_arr[i]->kobj); + probes->nr = 0; + kfree(probes_arr); + probes->probes_arr = NULL; +} + +static int damos_sysfs_probes_add_dirs(struct damos_sysfs_probes *probes, + struct damon_ctx *ctx) +{ + struct damon_probe *probe; + struct damos_sysfs_probe **probes_arr; + int i = 0; + + damon_for_each_probe(probe, ctx) + i++; + + if (!i) + return 0; + + probes_arr = kmalloc_objs(*probes_arr, i); + if (!probes_arr) + return -ENOMEM; + probes->probes_arr = probes_arr; + + i = 0; + damon_for_each_probe(probe, ctx) { + struct damos_sysfs_probe *sys_probe; + int err; + + sys_probe = damos_sysfs_probe_alloc(); + if (!sys_probe) { + damos_sysfs_probes_rm_dirs(probes); + return -ENOMEM; + } + err = kobject_init_and_add(&sys_probe->kobj, + &damos_sysfs_probe_ktype, &probes->kobj, "%d", + i); + if (err) { + kobject_put(&sys_probe->kobj); + damos_sysfs_probes_rm_dirs(probes); + return err; + } + probes_arr[i++] = sys_probe; + probes->nr++; + } + return 0; +} + static void damos_sysfs_probes_release(struct kobject *kobj) { struct damos_sysfs_probes *probes = container_of(kobj, @@ -67,7 +149,8 @@ static struct damon_sysfs_scheme_region } static int damos_sysfs_region_add_dirs( - struct damon_sysfs_scheme_region *region) + struct damon_sysfs_scheme_region *region, + struct damon_ctx *ctx) { struct damos_sysfs_probes *probes = damos_sysfs_probes_alloc(); int err; @@ -76,18 +159,24 @@ static int damos_sysfs_region_add_dirs( return -ENOMEM; err = kobject_init_and_add(&probes->kobj, &damos_sysfs_probes_ktype, ®ion->kobj, "probes"); - if (err) { - kobject_put(&probes->kobj); - return err; - } + if (err) + goto fail; + err = damos_sysfs_probes_add_dirs(probes, ctx); + if (err) + goto fail; region->probes = probes; return 0; + +fail: + kobject_put(&probes->kobj); + return err; } static void damos_sysfs_region_rm_dirs( struct damon_sysfs_scheme_region *region) { + damos_sysfs_probes_rm_dirs(region->probes); kobject_put(®ion->probes->kobj); } @@ -3054,7 +3143,7 @@ void damos_sysfs_populate_region_dir(str &sysfs_regions->kobj, "%d", sysfs_regions->nr_regions)) goto out; - if (damos_sysfs_region_add_dirs(region)) + if (damos_sysfs_region_add_dirs(region, ctx)) 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