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 7E80E511E7F for ; Thu, 3 Sep 2026 20:43:11 +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=1788468208; cv=none; b=UA252gXDVthZCkS4BUGUqyLbPLsoLKQTtgIAfRav5Uno1ZdIGI6R4KN4c7ifkFGQC7pcEuyYX+0CLFYE9hqTMuG5tFsJ7mjiT4rmvClZiuObvQ0RMOe38eNKxUy7iBo16lOC6at3LNm7Z9GeVPB1B7yJ5jaf8fDZ+p4zFDrLNJ0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788468208; c=relaxed/simple; bh=hXTp71UFbpjf/I19rhWcYWYeo/2lallV2t5IKMb2EY8=; h=Date:To:From:Subject:Message-Id; b=t1mRL0yv0yKvNreb1hQMFy7192AJHOOqCg3xLDChMdJpysKVEL4bq+MM/kuL6iFhiafNiav9DeuHqvBnGFX9DEO2rFmJPGSWTsx9kiwVuDL7QjKuCH3xeIPmT6cYizapKhNuOUGP7xteG/ksdBMtI8Ey3YhEShxjfjJJYdPCeaM= 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=sGMjae3g; 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="sGMjae3g" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 746F91F00A3E; Thu, 3 Sep 2026 20:43:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788468190; bh=uwFZcmwpzwLQZMXcn46ArOCOmO8FDytU3CJNn959hrM=; h=Date:To:From:Subject; b=sGMjae3gmlaOEeBIII/dwgyIYW8T/WCuzjryk97hHkqm/Mxsa5wi5XmifDXSb9DjL RgQZgDXRliAC5JvSyd7YT8XQfd3guJc3T+wIM9rAY6j/xIPBpUHnLKS8/+mnaLBIpS r170NIBlllMiVLF9H7tGwVRkIF33RzhgTVNCLAaQ= Date: Thu, 03 Sep 2026 13:43:10 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + revert-samples-damon-mtier-error-out-for-zero-quota-goal-target-values.patch added to mm-new branch Message-Id: <20260903204310.746F91F00A3E@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: Revert "samples/damon/mtier: error out for zero quota goal target values" has been added to the -mm mm-new branch. Its filename is revert-samples-damon-mtier-error-out-for-zero-quota-goal-target-values.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/revert-samples-damon-mtier-error-out-for-zero-quota-goal-target-values.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: Revert "samples/damon/mtier: error out for zero quota goal target values" Date: Wed, 2 Sep 2026 18:07:21 -0700 This reverts commit a16fd3ad9d89b05475864da97327870464611736. The commit was made to avoid zero damos quota goal target value, because it can trigger division-by-zero. Now the core layer handles the corner case. It returns an error for any attempt setting the aero target_value. The corner case handling in DAMON_SAMPLE_MTIER is hence no more needed. Remove it. Link: https://lore.kernel.org/20260903010722.94244-4-sj@kernel.org Signed-off-by: SJ Park Signed-off-by: Andrew Morton --- samples/damon/mtier.c | 3 --- 1 file changed, 3 deletions(-) --- a/samples/damon/mtier.c~revert-samples-damon-mtier-error-out-for-zero-quota-goal-target-values +++ a/samples/damon/mtier.c @@ -161,9 +161,6 @@ static struct damon_ctx *damon_sample_mt if (!scheme) goto free_out; damon_set_schemes(ctx, &scheme, 1); - /* zero target value causes division by zero in damos_quota_store() */ - if (!node0_mem_used_bp || !node0_mem_free_bp) - goto free_out; quota_goal = damos_new_quota_goal( promote ? DAMOS_QUOTA_NODE_MEM_USED_BP : DAMOS_QUOTA_NODE_MEM_FREE_BP, _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-core-skip-applying-scheme-if-region-split-for-quota-fails.patch mm-damon-paddr-respect-folio-end-for-damos_stat.patch mm-damon-paddr-respect-folio-end-for-damos-actions-except-stat.patch mm-damon-vaddr-respect-folio-end-for-damos_stat.patch mm-damon-vaddr-respect-folio-end-for-damos_migrate_hotcold.patch mm-damon-core-handle-extreme-memory-state-in-damon_get_node_mem_bp.patch mm-damon-core-handle-extreme-memory-state-in-get_node_memcg_used_bp.patch mm-damon-core-handle-extreme-memory-state-in-get_in_active_mem_bp.patch mm-damon-core-introduce-damon_filter_type_pgidle_unset.patch mm-damon-paddr-support-pgidle_unset-probe-filter-type.patch mm-damon-sysfs-support-pgidle_unset-probe-filter-type.patch docs-mm-damon-design-document-pgidle_unset-probe-filter-type.patch mm-damon-core-introduce-damon_prep-struct.patch mm-damon-core-commit-preps.patch mm-damon-core-introduce-damon_operations-prep_probes.patch mm-damon-paddr-support-damon_prep.patch mm-damon-sysfs-implement-preps-directory.patch mm-damon-sysfs-implement-preps-nr_preps-file.patch mm-damon-sysfs-create-directories-for-nr_preps-writes.patch mm-damon-sysfs-implement-prep_action-file.patch mm-damon-sysfs-pass-preps-to-damon-core.patch selftests-damon-sysfssh-test-probe-prep-sysfs-files.patch docs-mm-damon-design-document-probe-preps.patch docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files.patch docs-abi-damon-document-probe-prep-sysfs-files.patch mm-damon-tests-core-kunit-test-committing-psi-goal-to-psi-goal.patch mm-damon-core-handle-uninitialized-damos_quota_goal-last_psi_total.patch mm-damon-core-copy-nid-for-eligible_mem_bp-damos-quota-goal-commit.patch mm-damon-sysfs-set-next-refresh-jiffies-per-sysfs-context.patch mm-damon-tests-core-kunit-test-damon_commit_filter.patch mm-damon-tests-core-kunit-add-damon_commit_probes-test.patch selftests-damon-_damon_sysfs-implement-damonprobes.patch selftests-damon-drgn_dump_damon_status-dump-probes.patch selftests-damon-sysfspy-extend-commit-assertion-function-for-probes.patch selftests-damon-sysfspy-test-damon-probes.patch 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