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 728F5346797 for ; Sun, 8 Mar 2026 20:36:12 +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=1773002172; cv=none; b=uZKLQuO54SWQKslqKHhFkPvyL/g6SMYbZM/jAEs+FJceJ3q3fVnkyJYseajwcB0QWfLSUb43Li1STpeRK4bD+nvJwXkIYi0bhtHEmeEhXNWBhTNqRNE0ep6k6/PgFYix+4GY7ObvnPHF2ZRzihZWF8Me5osszeuneLeLLxZcDvw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773002172; c=relaxed/simple; bh=cv66RjqixZ6YABqWyOJ7Op7ZQdrT71QtiRGkEWL8A5Q=; h=Date:To:From:Subject:Message-Id; b=QEDuZTHeOMKgxqZpuzdt5+W+2VlWftxD6eSUhQDkxiCkeV5udrVGLI0iSf5OXS01CEgNTXK5lCNBOo3CgGUkIRjbDpnlb5bwT/MJTKiK/q7+5QBOeIwMWC97YnamXbD0qi6NIbW/4EsD1JiDcHk6UbX0weyEEfS3oUdU9jiC5zQ= 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=yHCdunEG; 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="yHCdunEG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBA29C116C6; Sun, 8 Mar 2026 20:36:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1773002172; bh=cv66RjqixZ6YABqWyOJ7Op7ZQdrT71QtiRGkEWL8A5Q=; h=Date:To:From:Subject:From; b=yHCdunEGH7KIyIGySTJz21oTt+YuykAsz3Ay/pTpH6bANY5L0M1sjTtZroVhfZMkT REqU/Qq9vl2Bpniwt2kDlix9+gJtR7nuGG/gh8mG+qh5Jl58lFWD8rWbnD5bSDqQUG fo5lU+UNvNdHh7Ej6BuBH1i8t4VzujhgwcsYx5zI= Date: Sun, 08 Mar 2026 13:36:11 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-core-use-time_after_eq-in-kdamond_fn.patch added to mm-new branch Message-Id: <20260308203611.EBA29C116C6@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/core: use time_after_eq() in kdamond_fn() has been added to the -mm mm-new branch. Its filename is mm-damon-core-use-time_after_eq-in-kdamond_fn.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-core-use-time_after_eq-in-kdamond_fn.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/core: use time_after_eq() in kdamond_fn() Date: Sat, 7 Mar 2026 11:49:14 -0800 damon_ctx->passed_sample_intervals and damon_ctx->next_*_sis are unsigned long. Those are compared in kdamond_fn() using normal comparison operators. It is unsafe from overflow. Use time_after_eq(), which is safe from overflows when correctly used, instead. Link: https://lkml.kernel.org/r/20260307194915.203169-4-sj@kernel.org Signed-off-by: SeongJae Park Signed-off-by: Andrew Morton --- mm/damon/core.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) --- a/mm/damon/core.c~mm-damon-core-use-time_after_eq-in-kdamond_fn +++ a/mm/damon/core.c @@ -2915,7 +2915,8 @@ static int kdamond_fn(void *data) if (ctx->ops.check_accesses) max_nr_accesses = ctx->ops.check_accesses(ctx); - if (ctx->passed_sample_intervals >= next_aggregation_sis) { + if (time_after_eq(ctx->passed_sample_intervals, + next_aggregation_sis)) { kdamond_merge_regions(ctx, max_nr_accesses / 10, sz_limit); @@ -2935,10 +2936,12 @@ static int kdamond_fn(void *data) sample_interval = ctx->attrs.sample_interval ? ctx->attrs.sample_interval : 1; - if (ctx->passed_sample_intervals >= next_aggregation_sis) { + if (time_after_eq(ctx->passed_sample_intervals, + next_aggregation_sis)) { if (ctx->attrs.intervals_goal.aggrs && - ctx->passed_sample_intervals >= - ctx->next_intervals_tune_sis) { + time_after_eq( + ctx->passed_sample_intervals, + ctx->next_intervals_tune_sis)) { /* * ctx->next_aggregation_sis might be updated * from kdamond_call(). In the case, @@ -2972,7 +2975,8 @@ static int kdamond_fn(void *data) kdamond_split_regions(ctx); } - if (ctx->passed_sample_intervals >= next_ops_update_sis) { + if (time_after_eq(ctx->passed_sample_intervals, + next_ops_update_sis)) { ctx->next_ops_update_sis = next_ops_update_sis + ctx->attrs.ops_update_interval / sample_interval; _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-core-set-quota-score-histogram-with-core-filters.patch mm-damon-core-do-non-safe-region-walk-on-kdamond_apply_schemes.patch mm-damon-core-split-regions-for-min_nr_regions.patch mm-damon-vaddr-do-not-split-regions-for-min_nr_regions.patch mm-damon-test-core-kunit-add-damon_apply_min_nr_regions-test.patch mm-damon-add-config_damon_debug_sanity.patch mm-damon-core-add-damon_new_region-debug_sanity-check.patch mm-damon-core-add-damon_del_region-debug_sanity-check.patch mm-damon-core-add-damon_nr_regions-debug_sanity-check.patch mm-damon-core-add-damon_merge_two_regions-debug_sanity-check.patch mm-damon-core-add-damon_merge_regions_of-debug_sanity-check.patch mm-damon-core-add-damon_split_region_at-debug_sanity-check.patch mm-damon-core-add-damon_reset_aggregated-debug_sanity-check.patch mm-damon-tests-kunitconifg-enable-damon_debug_sanity.patch selftests-damon-config-enable-damon_debug_sanity.patch mm-damon-tests-core-kunit-add-a-test-for-damon_commit_ctx.patch docs-mm-damon-design-document-the-power-of-two-limitation-for-addr_unit.patch mm-damon-core-remove-damos_set_next_apply_sis-duplicates.patch mm-damon-core-use-time_before-for-next_apply_sis.patch mm-damon-core-use-time_after_eq-in-kdamond_fn.patch mm-damon-core-use-mult_frac.patch mm-damon-tests-core-kunit-add-a-test-for-damon_is_last_region.patch mm-damon-core-clarify-damon_set_attrs-usages.patch mm-damon-document-non-zero-length-damon_region-assumption.patch docs-admin-guide-mm-damn-lru_sort-fix-intervals-autotune-parameter-name.patch docs-mm-damon-maintainer-profile-use-flexible-review-cadence.patch docs-mm-damon-index-fix-typo-autoamted-automated.patch