mm-damon-implement-a-new-damos-filter-type-for-unmapped-pages.patch removed from -mm tree

The quilt patch titled
Subject: mm/damon: implement a new DAMOS filter type for unmapped pages
has been removed from the -mm tree. Its filename was
mm-damon-implement-a-new-damos-filter-type-for-unmapped-pages.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: SeongJae Park <[email protected]>
Subject: mm/damon: implement a new DAMOS filter type for unmapped pages
Date: Wed, 19 Feb 2025 14:01:45 -0800

Patch series "mm/damon: introduce DAMOS filter type for unmapped pages".

User decides whether their memory will be mapped or unmapped. It implies that the two types of memory can have different characteristics and management requirements. Provide the DAMON-observaibility DAMOS-operation capability for the different types by introducing a new DAMOS filter type for unmapped pages.

This patch (of 2):

Implement yet another DAMOS filter type for unmapped pages on DAMON kernel API, and add support of it from the physical address space DAMON operations set (paddr). Since it is for only unmapped pages, support from the virtual address spaces DAMON operations set (vaddr) is not required.

---

 include/linux/damon.h    |    2 ++
 mm/damon/paddr.c         |    3 +++
 mm/damon/sysfs-schemes.c |    1 +
 3 files changed, 6 insertions(+)

@@ -337,6 +337,7 @@ struct damos_stat {
  * @DAMOS_FILTER_TYPE_MEMCG:	Specific memcg's pages.
  * @DAMOS_FILTER_TYPE_YOUNG:	Recently accessed pages.
  * @DAMOS_FILTER_TYPE_HUGEPAGE_SIZE:	Page is part of a hugepage.
+ * @DAMOS_FILTER_TYPE_UNMAPPED:	Unmapped pages.
  * @DAMOS_FILTER_TYPE_ADDR:	Address range.
  * @DAMOS_FILTER_TYPE_TARGET:	Data Access Monitoring target.
  * @NR_DAMOS_FILTER_TYPES:	Number of filter types.

@@ -357,6 +358,7 @@ enum damos_filter_type {
 	DAMOS_FILTER_TYPE_MEMCG,
 	DAMOS_FILTER_TYPE_YOUNG,
 	DAMOS_FILTER_TYPE_HUGEPAGE_SIZE,
+	DAMOS_FILTER_TYPE_UNMAPPED,
 	DAMOS_FILTER_TYPE_ADDR,
 	DAMOS_FILTER_TYPE_TARGET,
 	NR_DAMOS_FILTER_TYPES,

@@ -236,6 +236,9 @@ static bool damos_pa_filter_match(struct
 		matched = filter->sz_range.min <= folio_sz &&
 			  folio_sz <= filter->sz_range.max;
 		break;
+	case DAMOS_FILTER_TYPE_UNMAPPED:
+		matched = !folio_mapped(folio) || !folio_raw_mapping(folio);
+		break;
 	default:
 		break;
 	}

@@ -331,6 +331,7 @@ static const char * const damon_sysfs_sc
 	"memcg",
 	"young",
 	"hugepage_size",
+	"unmapped",
 	"addr",
 	"target",
 };

_

Patches currently in -mm which might be from [email protected] are

mm-damon-sysfs-schemes-let-damon_sysfs_scheme_set_filters-be-used-for-different-named-directories.patch mm-damon-sysfs-schemes-implement-core_filters-and-ops_filters-directories.patch mm-damon-sysfs-schemes-commit-filters-in-coreops_filters-directories.patch mm-damon-core-expose-damos_filter_for_ops-to-damon-kernel-api-callers.patch mm-damon-sysfs-schemes-record-filters-of-which-layer-should-be-added-to-the-given-filters-directory.patch mm-damon-sysfs-schemes-return-error-when-for-attempts-to-install-filters-on-wrong-sysfs-directory.patch docs-abi-damon-document-coreops_filters-directories.patch docs-admin-guide-mm-damon-usage-update-for-coreops_filters-directories.patch mm-damon-sysfs-validate-user-inputs-from-damon_sysfs_commit_input.patch mm-damon-core-invoke-kdamond_call-after-merging-is-done-if-possible.patch mm-damon-core-make-damon_set_attrs-be-safe-to-be-called-from-damon_call.patch mm-damon-sysfs-handle-commit-command-using-damon_call.patch mm-damon-sysfs-remove-damon_sysfs_cmd_request-code-from-damon_sysfs_handle_cmd.patch mm-damon-sysfs-remove-damon_sysfs_cmd_request_callback-and-its-callers.patch mm-damon-sysfs-remove-damon_sysfs_cmd_request-and-its-readers.patch mm-damon-sysfs-schemes-remove-obsolete-comment-for-damon_sysfs_schemes_clear_regions.patch mm-damon-remove-damon_callback-private.patch mm-damon-remove-before_start-of-damon_callback.patch mm-damon-remove-damon_callback-after_sampling.patch mm-damon-remove-damon_callback-before_damos_apply.patch mm-damon-remove-damon_operations-reset_aggregated.patch mm-damon-sysfs-schemes-avoid-wformat-security-warning-on-damon_sysfs_access_pattern_add_range_dir.patch mm-madvise-use-is_memory_failure-from-madvise_do_behavior.patch mm-madvise-split-out-populate-behavior-check-logic.patch mm-madvise-deduplicate-madvise_do_behavior-skip-case-handlings.patch mm-madvise-remove-len-parameter-of-madvise_do_behavior.patch