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 2A61839FCAE for ; Sun, 5 Jul 2026 19:16:30 +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=1783278991; cv=none; b=l9HzaffCIypwO4H/SxDbU4wyWIm035b4CWXzrtDXNdOHSsQR2iaEJvG5Ei3lsDFWdBXwg081ONbz6/EwNM9pSbEUJ5UynaRWFWRe+YUO4oMHQhaITMFratGcSPqtQhCD8xLAcTgJomATKRQXp/19aoZA+f7sZxJwbjC6/P1uhSE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783278991; c=relaxed/simple; bh=WaZHVRyTv+PgR6dSiopaGIuI7NVWLPLy4tASycgrFKE=; h=Date:To:From:Subject:Message-Id; b=iIvaxtj98U07AUjIM50ZL6MLU0miIi+8FTP/25Zwz5moIo8r+alXQgRPRBlXbjMOa7+pL1blTYcGuDKpb6z1JWOdDRa3DIMDKghuvXUaCdhq8eA3BCtPtK3arkdfLIUrudsHtbM9fowaWjGJ+GUMq37iBO2WZOyXVIFIQU/ikYI= 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=yA1R5y9R; 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="yA1R5y9R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCC5D1F00A3A; Sun, 5 Jul 2026 19:16:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1783278989; bh=HEmI5aiWkLTYQ7sKTrxGem8KRvrGx6FTB5hV54OQHoo=; h=Date:To:From:Subject; b=yA1R5y9R2gUjmAMVWcodDZmCR9Anpi89diMw86vSbe4oACG/W3BI8S+Vbtv/HS8T/ Iu4wl1QiM40mN0YLRTk2kZPt7q9NTdkYRpfYIXKwDJNjoL9a3X0/5tQvi7j6LPKC7G HnxdOMbXHJ3qP9kO8EsM00MgKGbFGEsuho2ihvqc= Date: Sun, 05 Jul 2026 12:16:29 -0700 To: mm-commits@vger.kernel.org,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-core-do-parameter-testing-commit-on-damon_start.patch added to mm-new branch Message-Id: <20260705191629.CCC5D1F00A3A@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: do parameter testing commit on damon_start() has been added to the -mm mm-new branch. Its filename is mm-damon-core-do-parameter-testing-commit-on-damon_start.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-do-parameter-testing-commit-on-damon_start.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: do parameter testing commit on damon_start() Date: Sun, 5 Jul 2026 08:55:53 -0700 damon_start() and damon_commit_ctx() are two main DAMON core API functions for setting whole DAMON parameters. While damon_commit_ctx() does holistic parameters testing, damon_start() just believes the caller validated the whole thing. Embed the holistic parameter check that is already in damon_commit_ctx() into damon_start(). After this change, the callers can safely call damon_start() without validating the parameters. Link: https://lore.kernel.org/20260705155600.96555-3-sj@kernel.org Signed-off-by: SJ Park Signed-off-by: Andrew Morton --- mm/damon/core.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) --- a/mm/damon/core.c~mm-damon-core-do-parameter-testing-commit-on-damon_start +++ a/mm/damon/core.c @@ -1865,6 +1865,8 @@ static int __damon_start(struct damon_ct return err; } +static int __damon_commit_ctx(struct damon_ctx *dst, struct damon_ctx *src); + /** * damon_start() - Starts the monitorings for a given group of contexts. * @ctxs: an array of the pointers for contexts to start monitoring @@ -1886,8 +1888,16 @@ int damon_start(struct damon_ctx **ctxs, int err = 0; for (i = 0; i < nr_ctxs; i++) { - if (!is_power_of_2(ctxs[i]->min_region_sz)) - return -EINVAL; + struct damon_ctx *test_ctx; + + test_ctx = damon_new_ctx(); + if (!test_ctx) + return -ENOMEM; + + err = __damon_commit_ctx(test_ctx, ctxs[i]); + damon_destroy_ctx(test_ctx); + if (err) + return err; } mutex_lock(&damon_lock); _ Patches currently in -mm which might be from sj@kernel.org are maintainers-s-seongjae-sj.patch mm-damon-core-validate-ranges-in-damon_set_regions.patch mm-damon-core-disallow-overlapping-input-ranges-for-damon_set_regions.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 mm-damon-add-damon_region-last_probe_hits.patch mm-damon-core-introduce-damon_probe_hits_mvsum.patch mm-damon-sysfs-schemes-set-probe-hits-as-pseudo-moving-sums.patch mm-damon-core-safely-validate-src-on-damon_commit_ctx.patch mm-damon-core-do-parameter-testing-commit-on-damon_start.patch mm-damon-sysfs-remove-duplicated-commit-input-validity-check.patch mm-damon-reclaim-remove-duplicated-min_region_sz-power-of-2-check.patch mm-damon-lru_sort-remove-duplicated-min_region_sz-power_of_2-check.patch mm-damon-document-region-size-validation-in-damon_set_regions.patch mm-damon-core-remove-start-end-check-in-damon_set_region_system_rams.patch mm-damon-sysfs-remove-region-size-validation.patch