From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793553399; b=GtD91iT95qe2nO+hBif5jnj5wpfMgguuVecD/sIc1C9LAI/MMiMPNnnOjLQTn3X1AFi3 2zl7G0U4H5McaqaaFrfoqLb0ATDlfVa5W7lLNqs6CrVUvfLmymFAglQI0d3tivZYbgnK/ 9rFNrZdf8ycOemBuf7l0grv9xCPD+h1T4h5chrm2sC/BCRrJCtjPZmFzuGoCNeDymFGl3 znmVyRgpAcw/rCztoKxLqRR97tp5sB42SbTpMqx23Z9hEl5p0GKpi4wovWSM5A02he0te lz8fYzelhA2aDl4kvbNza5cWEv0BEKHDKlSw5dc74888FBesiK1mPZNXuh1njc6JbHg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793553399; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=gY/iCu9E5Cwctk0xMV73TTepjgVS26fxiMdC6yjt3qQ=; b=4FRdy7cUv+e3VWMh19vM/Le8Ge0WyBSwbQSTiAAaQggAVg4uaebWoD//beJWcsJ/kUwN 9hRTSsGXVN2PfQTdtZW0F3HWn6KjiRs+7AMdl/3ztEKKXUyGVhfsJMwKChyF5fakbWjkV NrHdSS/tnyfAK9JQr9Iwb3fbMxTI8xUNuByrTh1g5tzU0bGj0j0nZDsoBqICCGl6xLkvf w6IZSQI7axurHDpu1qtCkV18BsEn0h61qQWqhtaCi6mv3+UGAL2W2FwiC2YG9luvqPQHC COs7Pht9GFLQM1WioxPemJNSZsr+1o88zUPWfbxk45Fcs3wYc39bwAEaodSk2VcFQjw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=f3nIKHnK; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 685B0606A335; Sun, 1 Nov 2026 17:16:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=f3nIKHnK Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1876D1F00A1A; Sun, 1 Nov 2026 17:16:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793553399; bh=gY/iCu9E5Cwctk0xMV73TTepjgVS26fxiMdC6yjt3qQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=f3nIKHnKutETK10+wjRGjPR+4SXlpJJGTlWtLynLWvfshUsh3PV7ySN632Xw3qMFZ hMS620cTSQAMCEhDshe7oVfZhV3ZnFP3RphoST+FyVO17Pt6w0oXJsQBDrocAfnla8 f0ROXcajz7X6IxUwMHrB5ndODBkE0MJ5MOyNrUa3krHqW7QmRT53FC79vyCkpUXRti xmpQE6uIKZd3LZoF6wkfhV0WQ5Fmi+xzi9tICVI1hDagPa5VFjU6FRsebw18SGsA24 Tme9SkcsEqDVu7mXEum26jXlGFqq0ivc+q29tNvirvytF5ECh9TrAMA6DlXIBUHCq1 /ZHz1h1EZZ5zg== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 3/6] mm/damon/vaddr: implement sz_filter_passed for migrate_{hot,cold} action Date: Sun, 1 Nov 2026 09:16:26 -0800 Message-ID: <20261101171630.81477-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261101171630.81477-1-sj@kernel.org> References: <20261101171630.81477-1-sj@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Support of DAMOS ops filter and sz_filter_passed support is up to each operation set. DAMON_VADDR supports both for only damos_stat action. It intentionally does not support those for madvise-based actions because applying filters could make it unnecessarily complicated and expensive. The vaddr implementation of migrate_{hot,cold} action does support DAMOS ops filters but sz_filter_passed. There is no real reason to not support sz_filter_passed. Add the support. Pass the sz_filter_passed pointer to the filter applying logic and accumulate the number. Closes: https://sashiko.dev/#/bug/linux-986e8b64-8e65-4e32-970f-4d3ebdf8206e Signed-off-by: SJ Park --- mm/damon/vaddr.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index b1d7bcf7305bb..6fd0e07b60705 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -776,6 +776,7 @@ static bool damos_va_filter_out(struct damos *scheme, struct folio *folio, struct damos_va_migrate_private { struct list_head *migration_lists; struct damos *scheme; + unsigned long *sz_filter_passed; }; /* @@ -846,7 +847,7 @@ static int damos_va_migrate_pmd_entry(pmd_t *pmd, unsigned long addr, struct damos_va_migrate_private *priv = walk->private; struct list_head *migration_lists = priv->migration_lists; struct damos *s = priv->scheme; - struct damos_migrate_dests *dests = &s->migrate_dests; + unsigned long *sz_filter_passed = priv->sz_filter_passed; struct folio *folio; spinlock_t *ptl; pte_t *start_pte, *pte, ptent; @@ -865,6 +866,7 @@ static int damos_va_migrate_pmd_entry(pmd_t *pmd, unsigned long addr, if (damos_va_filter_out(s, folio, walk->vma, addr, NULL, pmd)) goto huge_out; s->last_applied = folio; + *sz_filter_passed += folio_size(folio); damos_va_migrate_dests_add(folio, walk->vma, addr, dests, migration_lists); huge_out: @@ -893,6 +895,7 @@ static int damos_va_migrate_pmd_entry(pmd_t *pmd, unsigned long addr, if (damos_va_filter_out(s, folio, walk->vma, addr, pte, NULL)) continue; s->last_applied = folio; + *sz_filter_passed += folio_size(folio); damos_va_migrate_dests_add(folio, walk->vma, addr, dests, migration_lists); } @@ -971,6 +974,7 @@ static unsigned long damos_va_migrate(struct damon_target *target, priv.migration_lists = kmalloc_objs(*priv.migration_lists, nr_dests); if (!priv.migration_lists) return 0; + priv.sz_filter_passed = sz_filter_passed; for (int i = 0; i < nr_dests; i++) INIT_LIST_HEAD(&priv.migration_lists[i]); -- 2.47.3