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imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=jWEiFSk5; spf=pass (imf26.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1779374078; a=rsa-sha256; cv=none; b=oHFhhTOCsmxM7myEGUzselU0YCX8JYTW7O9hYBQFyfVC54vEVxu6LRFWs2w3VrePK+HbO/ 8wP9uV/rXOfiv59eLzK6BfDRTCcYXRg3nL7YmFS3llPUUuMw/UOQgCuAa52DINg3E4jvmi uvgmHzX3V21X4Brfls5+RrG5Ak8Yy20= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id CC943600C3; Thu, 21 May 2026 14:34:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 349ED1F000E9; Thu, 21 May 2026 14:34:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779374077; bh=oDpHqdp2/FfG8W6otjqNlnOFXaYu8wH7zUOP/guV6po=; h=From:To:Cc:Subject:Date; b=jWEiFSk53GduYLLCUcNwNsnavil23yX3zXvfJ2cxVG+reQXF35lvztNJ6uNseFk16 MvWA7k/XHMtEkdJloi/jQyycdC0GfEdaZPOd86TcUFcsxpZVc6gjUIjZI1FQVZALdS ezDdvqO151RFHncBqVl+pljPYy0D5oc6WhLhwSIUSLRVwIe1+n5OgonZ4z42zkOgpe heUNBdL9AKfTE8OG8a4dAPIQCHLDHLtkk2iADsiLAzVF3beAt2l/EIaYOuZbPyu6LV 58x1F6+2i7xYNeetZtVI7XcNyZWpekxX5YHCIE/xxtYkv2+DgJ3Cvk+3BHQh3NQmLr oVII3c3q1GNwg== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , Brendan Higgins , David Gow , Shuah Khan , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v1.2 00/14] mm/damon: minor improvements for code readability and tests Date: Thu, 21 May 2026 07:34:10 -0700 Message-ID: <20260521143428.83157-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: ebuk51y7ufno3oe3e36ucwknfj7z37kw X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 5F2EC140010 X-HE-Tag: 1779374078-198467 X-HE-Meta: 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 6JY9REJq zE/whmkgCY6BV8eH/7zS1Br47SOelKB8UFboxXCnn6zlbW1I9MItdA5A79nKEZmdjVSk4KuIIZ7y1fCGh+gWTzlRTAhuaQxTi97zQAi44cAH0mAFufzetRjsjtCEnnEwg7PoI2v/d3vbWiDoTGngwJr9vK5wmW+c//mqnsTIzlz2N/+4KhbUr11ymt+SvDlxd6RLPKfwGvnB7LKdL1S8xmgvJOMcuRQRzTrh3Mpk7IWNJRfM= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement minor improvements on code readability and tests for DAMON. First seven patches are for DAMON code readability and resulting maintenance. Patches 1 and 2 make damon_set_regions() safer and easier to read. Patches 3 and 4 remove fragmented DAMON API use cases. Patches 5-7 hides unused core functions that are unnecessarily exposed to API callers. The following seven patches are for DAMON tests improvement. Patches 8 and 9 adds and removes DAMON_DEBUG_SANITY verifications to ensure reasonable test coverage without too high overhead. Patch 10 adds a new kunit test for damon_set_regions(). Patch 11 makes sysfs.py selftest more gracefully finishes under test failures. Patches 12-13 adds simple sysfs.sh test cases for the monitoring intervals goal directory, the addr_unit file and the pause file. Changes from RFC v1.1 - RFC v1.1: https://lore.kernel.org/20260521035349.87565-1-sj@kernel.org - Free DAMON target in vaddr unit test fail-out path. Changes from RFC v1 - RFC v1: https://lore.kernel.org/20260520062858.167011-1-sj@kernel.org - Handle damon_set_regions() failure in vaddr unit test. - Free ranges array in vaddr unit test. - Fix wrong region address verification. - Fix typos in selftest: s/exit/exist/ SeongJae Park (14): mm/damon/core: safely handle no region case in damon_set_regions() mm/damon/core: do not use region out of a loop in damon_set_regions() samples/damon/mtier: replace damon_add_region() with damon_set_regions() mm/damon/tests/vaddr-kunit: replace damon_add_region() with damon_set_regions() mm/damon/core: hide damon_add_region() mm/damon/core: hide damon_insert_region() mm/damon/core: hide damon_destroy_region() mm/damon/core: add kdamond_call() debug_sanity check mm/damon/core: remove damon_verify_nr_regions() mm/damon/tests/core-kunit: add damon_set_regions() test cases selftests/damon/sysfs.py: stop kdamonds before failing selftests/damon/sysfs.sh: test monitoring intervals goal dir selftests/damon/sysfs.sh: test addr_unit file existence selftests/damon/sysfs.sh: test pause file existence include/linux/damon.h | 13 --- mm/damon/core.c | 92 ++++++++++++---- mm/damon/tests/core-kunit.h | 142 +++++++++++++++++++++---- mm/damon/tests/vaddr-kunit.h | 27 +++-- samples/damon/mtier.c | 10 +- tools/testing/selftests/damon/sysfs.py | 4 + tools/testing/selftests/damon/sysfs.sh | 14 +++ 7 files changed, 233 insertions(+), 69 deletions(-) base-commit: ac6b83c7bf3671e8ff0d541cf03e6eaeed00a79e -- 2.47.3