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 4ED5B20B80B for ; Thu, 2 Jul 2026 00:23:09 +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=1782951790; cv=none; b=nPWQdlRK6s5sxqyo1bb3fv6uIl/2JPx/FiALCiKydJCfjdUg0oDzDGxmQ79eWGxc00Ku2YGmvxQoqfGIzNbL8IswnOhvcgfm0cwuzr4ZjnAkznmwp5qDL6hzVszf0ZiUAsR/L1sk14vFB1FwWUm2jPsacqHD2MsyVYyNdjfFPUU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782951790; c=relaxed/simple; bh=79s4U/UEY6a/tO08Tdy2ByNTGkF7r5LiYRJLYSGsP9Y=; h=Date:To:From:Subject:Message-Id; b=h78VygUbNhTsLKy65L/aYfu4v//0G0mOBK8Wi+Jy9/rmBOfJhTP5z74OVeCGvZHZPuvK35BkQ0lXdTqUiSSdbtQ5YAEoambBZNNs0foTkb3oDX5d1eP0z/dCVm/MTIOJLmtBakvRUNlhFxcyW+6nZV1G60kzHPYehyFgtwbBcNw= 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=QAbpTh0b; 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="QAbpTh0b" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2041C1F000E9; Thu, 2 Jul 2026 00:23:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1782951789; bh=AZWxjg1GTffV5bGzQaHhE45uzCSJ7vLySh9pFDQ5twQ=; h=Date:To:From:Subject; b=QAbpTh0bQB29Wbkp2lFmimPVNBZFZ+9gWv4SFvKz/CrZNHcxMfKSPnJqwMudZ2PeB xG7O0ocmm/PX8zFdHnUElyR7wGtz/gZDFcQwYOrcFlhSYQRb/0XDlWBo26Xtlno2js myBdZjMnI0i1agX+qYstWvyCkKcXodilp5FtNPiU= Date: Wed, 01 Jul 2026 17:23:08 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-core-use-damon_nr_accesses_mvsum-for-damos-region-tracing.patch added to mm-new branch Message-Id: <20260702002309.2041C1F000E9@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 damon_nr_accesses_mvsum() for damos region tracing has been added to the -mm mm-new branch. Its filename is mm-damon-core-use-damon_nr_accesses_mvsum-for-damos-region-tracing.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-damon_nr_accesses_mvsum-for-damos-region-tracing.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: SJ Park Subject: mm/damon/core: use damon_nr_accesses_mvsum() for damos region tracing Date: Mon, 29 Jun 2026 21:07:59 -0700 damon_nr_accesses_mvsum() returns a value same to nr_accesses_bp. Also the function is more simple and therefore more tolerant to errors. Execution of the function would be more expensive than the simple read of the field, but because the function is quite simple, the overhead should be negligible. Use it in the DAMON region exporting trace points instead of the nr_accesses_bp. Link: https://lore.kernel.org/20260630040812.149729-7-sj@kernel.org Signed-off-by: SJ Park Cc: Brendan Higgins Cc: "Masami Hiramatsu (Google)" Cc: Mathieu Desnoyers Cc: Shuah Khan Cc: Steven Rostedt Signed-off-by: Andrew Morton --- include/trace/events/damon.h | 8 +++++--- mm/damon/core.c | 5 +++-- 2 files changed, 8 insertions(+), 5 deletions(-) --- a/include/trace/events/damon.h~mm-damon-core-use-damon_nr_accesses_mvsum-for-damos-region-tracing +++ a/include/trace/events/damon.h @@ -78,9 +78,11 @@ TRACE_EVENT_CONDITION(damos_before_apply TP_PROTO(unsigned int context_idx, unsigned int scheme_idx, unsigned int target_idx, struct damon_region *r, - unsigned int nr_regions, bool do_trace), + unsigned int nr_accesses, unsigned int nr_regions, + bool do_trace), - TP_ARGS(context_idx, scheme_idx, target_idx, r, nr_regions, do_trace), + TP_ARGS(context_idx, scheme_idx, target_idx, r, nr_accesses, + nr_regions, do_trace), TP_CONDITION(do_trace), @@ -101,7 +103,7 @@ TRACE_EVENT_CONDITION(damos_before_apply __entry->target_idx = target_idx; __entry->start = r->ar.start; __entry->end = r->ar.end; - __entry->nr_accesses = r->nr_accesses_bp / 10000; + __entry->nr_accesses = nr_accesses; __entry->age = r->age; __entry->nr_regions = nr_regions; ), --- a/mm/damon/core.c~mm-damon-core-use-damon_nr_accesses_mvsum-for-damos-region-tracing +++ a/mm/damon/core.c @@ -2452,7 +2452,7 @@ static void damos_apply_scheme(struct da struct damos *siter; /* schemes iterator */ unsigned int sidx = 0; struct damon_target *titer; /* targets iterator */ - unsigned int tidx = 0; + unsigned int tidx = 0, nr_accesses = 0; bool do_trace = false; /* get indices for trace_damos_before_apply() */ @@ -2467,6 +2467,7 @@ static void damos_apply_scheme(struct da break; tidx++; } + nr_accesses = damon_nr_accesses_mvsum(r, c); do_trace = true; } @@ -2482,7 +2483,7 @@ static void damos_apply_scheme(struct da if (damos_core_filter_out(c, t, r, s)) return; ktime_get_coarse_ts64(&begin); - trace_damos_before_apply(cidx, sidx, tidx, r, + trace_damos_before_apply(cidx, sidx, tidx, r, nr_accesses, damon_nr_regions(t), do_trace); sz_applied = c->ops.apply_scheme(c, t, r, s, &sz_ops_filter_passed); _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-sysfs-schemes-fix-dir-put-orders-in-access_pattern_add_dirs.patch mm-damon-sysfs-schemes-put-stats-for-scheme_add_dirs-internal-error.patch mm-damon-ops-common-handle-extreme-intervals-in-damon_hot_score.patch mm-damon-add-a-kernel-doc-comment-for-damon_ctx-probes.patch mm-damon-add-a-kernel-doc-comment-for-damon_ctx-rnd_state.patch maintainers-s-seongjae-sj.patch samples-damon-wsse-handle-damon_start-failure.patch samples-damon-prcl-handle-damon_start-failure.patch samples-damon-mtier-handle-damon_start-failure.patch samples-damon-mtier-handle-damon_stop-failure.patch samples-damon-wsse-stop-and-free-damon-ctx-when-damon_call-fails.patch samples-damon-prcl-stop-and-free-damon-ctx-when-damon_call-fails.patch mm-damon-sysfs-kobject_del-target-normal-context-and-kdamond-dirs.patch mm-damon-sysfs-kobject_del-region-and-target-error-dirs.patch mm-damon-sysfs-schemes-kobject_del-scheme-dirs.patch mm-damon-sysfs-schemes-kobject_del-scheme-region-dirs.patch mm-damon-sysfs-schemes-kobject_del-scheme-filter-dirs.patch mm-damon-sysfs-schemes-kobject_del-scheme-quota-goal-dirs.patch mm-damon-sysfs-schemes-kobject_del-scheme-action-destination-dirs.patch mm-damon-sysfs-kobject_del-probe-dirs.patch mm-damon-sysfs-kobject_del-probe-filter-dirs.patch mm-damon-sysfs-kobject_del-probe-dirs-in-probes_addd_dir-error-path.patch mm-damon-sysfs-schemes-kobject_del-region-for-populate_region-error.patch docs-mm-damon-design-update-for-damos_quota_node_eligible_mem_bp.patch docs-abi-damon-document-probe-files.patch mm-damon-tests-core-kunit-test-damon_rand.patch selftests-damon-sysfssh-test-multiple-probe-dirs-creation.patch selftests-damon-sysfssh-test-coreops_filters-directories.patch selftests-damon-sysfssh-test-dests-dir.patch selftests-damon-sysfssh-test-all-files-in-quota-goal-dir.patch mm-damon-core-reduce-range-setup-in-damon_commit_target_regions.patch mm-damon-sysfs-split-probe-setup-function-out.patch mm-damon-sysfs-split-out-filters-setup-function.patch mm-damon-sysfs-fix-typos-in-probe_addrm_dirs-s-attr-probe.patch mm-damon-core-introduce-damon_nr_accesses_mvsum.patch mm-damon-tests-core-kunit-test-damon_mvsum.patch mm-damon-core-always-update-last_nr_accesses-for-intervals-change.patch mm-damon-core-handle-unreset-nr_accesses-in-damon_nr_accesses_mvsum.patch mm-damon-core-use-damon_nr_accesses_mvsum-in-__damos_valid_target.patch mm-damon-core-use-damon_nr_accesses_mvsum-for-damos-region-tracing.patch mm-damon-sysfs-schemes-use-damon_nr_accesses_mvsum-for-damo-regions.patch mm-damon-core-remove-damon_warn_fix_nr_accesses_corruption.patch mm-damon-core-remove-damon_verify_reset_aggregated.patch mm-damon-core-remove-damon_verify_merge_regions_of.patch mm-damon-tests-core-kunit-remove-nr_accesses_bp-setup-and-tests.patch selftests-damon-drgn_dump_damon_status-do-not-dump-nr_accesses_bp.patch mm-damon-core-remove-nr_accesses_bp-setups-and-updates.patch mm-damon-core-remove-attrs-param-from-damon_update_region_access_rate.patch mm-damon-paddr-remove-attrs-param-from-__damon_pa_check_access.patch mm-damon-vaddr-remove-attrs-param-from-__damon_va_check_access.patch mm-damon-core-remove-damon_moving_sum-and-its-unit-test.patch mm-damon-core-remove-damon_region-nr_accesses_bp.patch