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 12F2420C461 for ; Tue, 19 May 2026 00:56:00 +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=1779152160; cv=none; b=JD4PH2syWbbVoWSdEp+x9UomzCLy0X1WasHQtVmOSxd8Ro3pX6aL0k8OeXGp8CdAxUurtGhJdDGNTHbvLgMfXBvzln3OUHa52HWa+21sw64a3ZZtupnFqdYfd+EX+GYjDgdCgJc4cGLtwByujFCjDAF4ERulRgLY7HqbjG+XJek= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779152160; c=relaxed/simple; bh=NJWjpyhO2ysPzL3ah7cYBJzmpARNlvbLGDieWlU+SXo=; h=Date:To:From:Subject:Message-Id; b=uTzNz35NMySQPE43+mYOFYJwQRMTlovftUXrvjToAkIgIqimo45JAvrWDhyygIRh8Q8FDAOCYkOyqaL2G4zTOAGIlhLW04fqJfKg9Qxf0LAwJ8aE7EvYvxQ7hqYRMb+4CIDhulBH/oJdLzUkEVPa2pSNjHUGisTMAG8RqwUoTpM= 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=ZYvO75b4; 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="ZYvO75b4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E006FC2BCB7; Tue, 19 May 2026 00:55:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1779152160; bh=NJWjpyhO2ysPzL3ah7cYBJzmpARNlvbLGDieWlU+SXo=; h=Date:To:From:Subject:From; b=ZYvO75b46V7/yYoL5O7d++CENJSKZpqMJ8HSx5yMDBH7qGqVbgx26mUzwaW0rbAvf 88a/RsgylFDI+urHg1D4bfKdSeCyHXkVZUQ5pVoqw3Xo/25FToMUtQUGNIBYr/YsQO YMb0TkNw50mVkwIGStlaX9BwvCI1HeGaWmH4+Kvs= Date: Mon, 18 May 2026 17:55:59 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-sysfs-add-filters-f-path-file.patch added to mm-new branch Message-Id: <20260519005559.E006FC2BCB7@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: add filters//path file has been added to the -mm mm-new branch. Its filename is mm-damon-sysfs-add-filters-f-path-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-add-filters-f-path-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: add filters//path file Date: Mon, 18 May 2026 16:41:12 -0700 Introduce a new DAMON sysfs file for letting users setup the target memory cgroup of the belonging memory cgroup attribute monitoring. The file is named 'path', located under the probe filter directory. Users can set the target memory cgroup by writing the path to the memory cgroup from the cgroup mount point to the file. Link: https://lore.kernel.org/20260518234119.97569-25-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.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) --- a/mm/damon/sysfs.c~mm-damon-sysfs-add-filters-f-path-file +++ a/mm/damon/sysfs.c @@ -756,6 +756,7 @@ struct damon_sysfs_filter { enum damon_filter_type type; bool matching; bool allow; + char *path; }; static struct damon_sysfs_filter *damon_sysfs_filter_alloc(void) @@ -774,6 +775,10 @@ damon_sysfs_filter_type_names[] = { .type = DAMON_FILTER_TYPE_ANON, .name = "anon", }, + { + .type = DAMON_FILTER_TYPE_MEMCG, + .name = "memcg", + }, }; static ssize_t type_show(struct kobject *kobj, @@ -862,11 +867,46 @@ static ssize_t allow_store(struct kobjec return count; } +static ssize_t path_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + int len; + + if (!mutex_trylock(&damon_sysfs_lock)) + return -EBUSY; + len = sysfs_emit(buf, "%s\n", filter->path ? filter->path : ""); + mutex_unlock(&damon_sysfs_lock); + return len; +} + +static ssize_t path_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + char *path = kmalloc_objs(*path, size_add(count, 1)); + + if (!path) + return -ENOMEM; + strscpy(path, buf, size_add(count, 1)); + if (!mutex_trylock(&damon_sysfs_lock)) { + kfree(path); + return -EBUSY; + } + kfree(filter->path); + filter->path = path; + mutex_unlock(&damon_sysfs_lock); + return count; +} + static void damon_sysfs_filter_release(struct kobject *kobj) { struct damon_sysfs_filter *filter = container_of(kobj, struct damon_sysfs_filter, kobj); + kfree(filter->path); kfree(filter); } @@ -879,10 +919,14 @@ static struct kobj_attribute damon_sysfs static struct kobj_attribute damon_sysfs_filter_allow_attr = __ATTR_RW_MODE(allow, 0600); +static struct kobj_attribute damon_sysfs_filter_path_attr = + __ATTR_RW_MODE(path, 0600); + static struct attribute *damon_sysfs_filter_attrs[] = { &damon_sysfs_filter_type_attr.attr, &damon_sysfs_filter_matching_attr.attr, &damon_sysfs_filter_allow_attr.attr, + &damon_sysfs_filter_path_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_filter); _ 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