From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 AB85F31AF2D for ; Wed, 7 Oct 2026 00:52:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791334342; cv=none; b=Z73YIyUNb8TE46QsX4V4jLEtyG8TlrsP3qCxoKpd/wrtnX2wHLOaA7reJpS4jE3lpVheQfoQGxMjNB/ia+pdcv8gNhBb+QXvBmOj9zqB2Lf18ne2LdJ9+sfKl4VA7dgHHwKqdYNN/Djt83PATrBFBEXHKbmsL8ZaeJjPgzhOcME= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791334342; c=relaxed/simple; bh=DS+Fh3aM/634vQnNNMWonwaErzDtQ+bCeqJuSfxkP+o=; h=Date:To:From:Subject:Message-Id; b=X5W6ISms7xDhRqaNfCveOa658FdY0cWg6/xoigCLGlCGURmVsobZAUeuRceW/2xcurs/iVKGKpSGGOj1OXPlnheoQtocEb+p0F336/U0JYybIC0wwSJAJ0h1jGkxQrWLKQGAYATBbPZ1eeBjHbXHNh9RVdICFHcE748LKjEqTiY= 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=E2WRwW0a; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="E2WRwW0a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 451BC1F0089D; Wed, 7 Oct 2026 00:52:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791334340; bh=Z8qeVLiii1GgshA1+b918WvuaySx1nlj9GIHvKGRZmM=; h=Date:To:From:Subject; b=E2WRwW0ar+gW512sVss5q7ptdgh1yhva2KQHB/vj2YzGFmPTzoK2IDATj35NHUJbn VFzicJg/QjJwQbvVhri4HrDMB2Imf3fsNO7OZN2U9QlgVuxsQMFwZ5FO4jNOIjRKTN BIYzpcxCxiEqS5KHmlKx0HPn81zF3r9ZceupBzrc= Date: Tue, 06 Oct 2026 17:52:19 -0700 To: mm-commits@vger.kernel.org,vbabka@kernel.org,surenb@google.com,shuah@kernel.org,rppt@kernel.org,rdunlap@infradead.org,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,david@kernel.org,corbet@lwn.net,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-damon-core-introduce-damon_prep-struct.patch removed from -mm tree Message-Id: <20261007005220.451BC1F0089D@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/damon/core: introduce damon_prep struct has been removed from the -mm tree. Its filename was mm-damon-core-introduce-damon_prep-struct.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: SJ Park Subject: mm/damon/core: introduce damon_prep struct Date: Tue, 1 Sep 2026 06:24:52 -0700 Some DAMON probe filter types require preparatory actions. For example, pgilde_unset probe filter can say if the page was accessed but when. To answer the second question, the PG_Idle flag should be set at a specific time. It can make life much easier if DAMON can do such preparatory actions. Introduce a new data type called damon_prep. It specifies each of the preparation actions for each probe. DAMON will execute the action for each region per sampling interval, like it clears page table accessed bits and unsets PG_Idle flag for access monitoring. Also introduce DAMON_PREP_SET_PGIDLE as the initial prep action. As the name says, it will do exactly what DAMON was doing as the preparation action for the access monitoring. Link: https://lore.kernel.org/20260901132506.99243-6-sj@kernel.org Signed-off-by: SJ Park Signed-off-by: Andrew Morton Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Randy Dunlap Cc: Shuah Khan Cc: Suren Baghdasaryan Cc: Vlastimil Babka --- include/linux/damon.h | 32 ++++++++++++++++++++++++++++++++ mm/damon/core.c | 26 ++++++++++++++++++++++++++ 2 files changed, 58 insertions(+) --- a/include/linux/damon.h~mm-damon-core-introduce-damon_prep-struct +++ a/include/linux/damon.h @@ -743,6 +743,27 @@ struct damon_intervals_goal { }; /** + * enum damon_prep_action - DAMON probing preparation action. + * + * @DAMON_PREP_SET_PGIDLE: Set the probing memory as idle page. + */ +enum damon_prep_action { + DAMON_PREP_SET_PGIDLE, +}; + +/** + * struct damon_prep - DAMON probing preparation request. + * + * @action: Action to do to the probing memory for the preparation. + */ +struct damon_prep { + enum damon_prep_action action; +/* private: */ + /* siblings list. */ + struct list_head list; +}; + +/** * enum damon_filter_type - Type of &struct damon_filter * * @DAMON_FILTER_TYPE_ANON: Anonymous pages. @@ -783,6 +804,8 @@ struct damon_filter { struct damon_probe { unsigned int weight; /* private: */ + /* Preparation actions to apply to each probing memory. */ + struct list_head preps; /* Filters for assessing if a given region is for this probe. */ struct list_head filters; /* Siblings list. */ @@ -962,6 +985,12 @@ static inline unsigned long damon_sz_reg return r->ar.end - r->ar.start; } +#define damon_for_each_prep(p, probe) \ + list_for_each_entry(p, &(probe)->preps, list) + +#define damon_for_each_prep_safe(p, next, probe) \ + list_for_each_entry_safe(p, next, &(probe)->preps, list) + #define damon_for_each_filter(f, p) \ list_for_each_entry(f, &(p)->filters, list) @@ -1015,6 +1044,9 @@ static inline unsigned long damon_sz_reg #ifdef CONFIG_DAMON +struct damon_prep *damon_new_prep(enum damon_prep_action action); +void damon_add_prep(struct damon_probe *p, struct damon_prep *prep); + struct damon_filter *damon_new_filter(enum damon_filter_type type, bool matching, bool allow); void damon_add_filter(struct damon_probe *probe, struct damon_filter *f); --- a/mm/damon/core.c~mm-damon-core-introduce-damon_prep-struct +++ a/mm/damon/core.c @@ -112,6 +112,28 @@ int damon_select_ops(struct damon_ctx *c return err; } +struct damon_prep *damon_new_prep(enum damon_prep_action action) +{ + struct damon_prep *prep; + + prep = kmalloc_obj(*prep); + if (!prep) + return NULL; + prep->action = action; + INIT_LIST_HEAD(&prep->list); + return prep; +} + +void damon_add_prep(struct damon_probe *p, struct damon_prep *prep) +{ + list_add_tail(&prep->list, &p->preps); +} + +static void damon_free_prep(struct damon_prep *p) +{ + kfree(p); +} + struct damon_filter *damon_new_filter(enum damon_filter_type type, bool matching, bool allow) { @@ -168,6 +190,7 @@ struct damon_probe *damon_new_probe(void if (!p) return NULL; p->weight = 0; + INIT_LIST_HEAD(&p->preps); INIT_LIST_HEAD(&p->filters); INIT_LIST_HEAD(&p->list); return p; @@ -185,8 +208,11 @@ static void damon_del_probe(struct damon static void damon_free_probe(struct damon_probe *p) { + struct damon_prep *prep, *prep_next; struct damon_filter *f, *next; + damon_for_each_prep_safe(prep, prep_next, p) + damon_free_prep(prep); damon_for_each_filter_safe(f, next, p) damon_free_filter(f); kfree(p); _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-core-use-damon_nr_samples_per_aggr-for-max-merge-threshold.patch mm-damon-core-remove-debug-messages.patch mm-damon-core-remove-debug-messages-fix.patch mm-damon-vaddr-remove-a-debug-message.patch mm-damon-core-validate-number-of-probes-in-valid_probe_params.patch mm-damon-sysfs-remove-probes-number-validation.patch mm-damon-tests-core-kunit-extend-set_regions-test-for-error-case.patch mm-damon-tests-core-kunit-test-=0-size-damon_set_regions-inputs.patch mm-damon-tests-core-kunit-test-overlapping-ranges-for-set_regions.patch mm-damon-tests-core-kunit-test-damon_nr_samples_per_aggr.patch selftests-damon-sysfssh-test-hugepage_mem_bp-quota-goal.patch docs-mm-damon-maintainer-profile-update-ai-review-for-sashiko-replies.patch docs-abi-damon-recommend-subsystem-doc-instead-of-admin-guide.patch mm-damon-core-error-damos_commit_quota_goal-for-zero-target_value.patch revert-mm-damon-lru_sort-error-out-for-10000-active_mem_bp.patch revert-samples-damon-mtier-error-out-for-zero-quota-goal-target-values.patch mm-damon-core-handle-null-ctx-parameter-in-damon_call.patch mm-damon-core-set-ctx-call_controls_obsolete-in-damon_new_ctx.patch mm-damon-reclaim-remove-unnecessary-damon_call-param-validation.patch mm-damon-lru_sort-remove-unnecessary-damon_call-param-validation.patch mm-damon-vaddr-support-prep_probes.patch mm-damon-paddr-move-probe-filter-handling-to-ops-common.patch mm-damon-vaddr-support-apply_probe.patch mm-damon-vaddr-extend-apply_probes-for-hugetlb.patch mm-damon-vaddr-support-pgidle_unset-probe-filter-type.patch mm-damon-api-introduce-damon_filter_type_pgidle_set.patch mm-damon-paddr-support-damon_filter_type_pgidle_set.patch mm-damon-vaddr-support-damon_filter_type_pgidle_set.patch mm-damon-sysfs-support-damon_filter_type_pgidle_set.patch docs-mm-damon-design-update-for-pgidle_set-probe-filter.patch mm-damon-api-introduce-damos_filter_type_probe_hits_wsum.patch mm-damon-api-introduce-damos_filter_type_probe_hits_wsum-fix.patch mm-damon-core-extend-probe_hits_wsum-for-moving-sum-based-calculation.patch mm-damon-core-support-probe_hits_wsum-damos-core-filter.patch mm-damon-sysfs-schemes-rename-sysfs_filter-sz_range-to-range_minmax.patch mm-damon-sysfs-schemes-support-probe_hits_wsum-damos-core-filter.patch docs-mm-damon-design-update-for-probe_hits_wsum-damos-core-filter.patch docs-admin-guide-mm-damon-usage-update-for-probe_hits_wsum-damos-filter.patch mm-damon-sysfs-schemes-read-sysfs_filter-addr_range-only-once.patch mm-damon-sysfs-schemes-read-sysfs_filter-sz_range-only-once.patch mm-damon-core-return-an-error-from-damos_commit_filter_arg.patch mm-damon-core-disallow-max-min-damos-filter-range-arguments-commit.patch mm-damon-sysfs-schemes-drop-centralized-filter-range-arg-validations.patch mm-damon-sysfs-schemes-use-switch-case-in-add_scheme_filters.patch mm-damon-core-kunit-extend-damos_commit_filter_for-for-wrong-input.patch mm-damon-core-kunit-test-invalid-damos-filter-commits.patch mm-damon-api-introduce-damon_filter_type_hugepage_size.patch mm-damon-core-commit-hugepage_size-type-damon-filter.patch mm-damon-ops-common-support-hugepage_size-damon-filter-matching.patch mm-damon-sysfs-add-minmax-files-under-probe-filter-directory.patch mm-damon-sysfs-support-hugepage_size-probe-filter.patch docs-mm-damon-design-update-for-hugepage_size-probe-filter.patch docs-admin-guide-mm-damon-usage-update-for-hugepage_size.patch docs-abi-damon-update-for-hugepage_size-probe-filter.patch mm-damon-api-remove-nr_damos_filter_types.patch mm-damon-core-use-abs_diff-in-damon_feed_loop_next_input.patch mm-damon-core-use-mult_frac-in-damon_feed_loop_next_input.patch mm-damon-core-set-damon_ctx-walk_control_obsolete-in-damon_new_ctx.patch mm-damon-core-document-damon_call-damon_start-race-hang-issue.patch mm-damon-paddr-remove-pa-parameter-from-damon_pa_filter_pass.patch mm-damon-tests-core-kunit-test-eligible_mem_bp-commitment.patch mm-damon-tests-core-kunit-add-probe_hits_wsum-damos-filter-commit-test.patch selftests-damon-sysfs_memcg_path_leak-fail-only-for-real-damon-leak.patch docs-mm-damon-design-clarify-bp-is-basis-point.patch mm-damon-core-introduce-damos_quota_goal-complement.patch mm-damon-core-add-complement-argument-to-damos_new_quota_goal.patch mm-damon-sysfs-schemes-support-quota-goal-complement-flag.patch mm-damon-tests-core-kunit-test-quota_goal-complement-commit.patch selftests-damon-sysfssh-test-quota-goal-complement-flag-file.patch docs-mm-damon-design-document-damos-quota-goal-complement-flag.patch docs-admin-guide-mm-damon-usage-update-for-quota-goal-complement-file.patch docs-abi-damon-update-for-quota-goal-metric-complement-sysfs-file.patch