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GET /api/patches/2216657/?format=api
{ "id": 2216657, "url": "http://patchwork.ozlabs.org/api/patches/2216657/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260327021403.214713-25-usama.arif@linux.dev/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260327021403.214713-25-usama.arif@linux.dev>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260327021403.214713-25-usama.arif@linux.dev/", "date": "2026-03-27T02:09:06", "name": "[v3,24/24] selftests/mm: add madv_dontneed_partial test", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "2bf0c29b6f71280e7b4b032828acb68ff401ae11", "submitter": { "id": 92719, "url": "http://patchwork.ozlabs.org/api/people/92719/?format=api", "name": "Usama Arif", "email": "usama.arif@linux.dev" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260327021403.214713-25-usama.arif@linux.dev/mbox/", "series": [ { "id": 497678, "url": "http://patchwork.ozlabs.org/api/series/497678/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=497678", "date": "2026-03-27T02:08:43", "name": "[v3,01/24] mm: thp: make split_huge_pmd functions return int for error propagation", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497678/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216657/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216657/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-18867-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256\n header.s=key1 header.b=LBA+DGA7;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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Fri, 27 Mar 2026 13:16:48 +1100 (AEDT)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1774577808;\n\tcv=none;\n b=iStAfePK6p2ZU4lBbs+87T4zcj+evGtG1AzZ7/rHXEoPg05RfgityOtbTExcMiX0Pn6iP/B0hzFGIm+B5W60fHAhYId0mYZ5DqFOZ4dVsWTIU1g+0zY13IO/bbr5lWW72WUpFYeU0SxlEI7xNTobxEKFW6VxikhUYkYf8ncxdLxsr1XumlOHEcAKD8bEmteW5y45Ih8WiHqntNS1is0QF0S1RwvZonLN4oDgDmE37Fw8txYPC8SkuRFr0WWm7ZbBdhLJhDbAZ4ibvNQsSK7O/8jnYT7/tl07ZS+FCZocuHB3gttACB3SqDCf49VzH29mDaftw6fJglbKn5zYc0dbMA==", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1774577808; c=relaxed/relaxed;\n\tbh=6/HdPBhl1cpZOUmiZuBTWaeHIDSWjs3qo4yxLZnBGpA=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=S6k/bthJJwOtJmvfztIUIxzuxT2mbA8Qx0W+OMkwR8K1IoDz+eaTZXSMmUl7+zNaBRuMtzrs4a/jPHZiZ3L1Ey+yhRfWUh/Uz1Pp/qiYnDLGwXXYDSWrgVuirNz447ho1pVu7Ow699ZeTSfzahKcPcM+bHJ/XINDvhUc3++tUtBZgymUlDTwCnB89NYZJaNDshNjIsJ5sKYMSYvIIlQL8aUwPNkKaqtI5xT4e7eijJl/LuR9OElz8K9DU+4dJt/yzcCjks/MVIVAhyrtoOtR5UpyBvCUZdyvfKa18Z4IsnSf8b3OiQVeHa7qX1SCbncU9BIGFuWt2E/bz2GX9hyMwg==", "ARC-Authentication-Results": "i=1; lists.ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=linux.dev; dkim=pass (1024-bit key;\n unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256\n header.s=key1 header.b=LBA+DGA7; dkim-atps=neutral;\n spf=pass (client-ip=95.215.58.179; helo=out-179.mta1.migadu.com;\n envelope-from=usama.arif@linux.dev;\n receiver=lists.ozlabs.org) smtp.mailfrom=linux.dev", "X-Report-Abuse": "Please report any abuse attempt to abuse@migadu.com and\n include these headers.", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1;\n\tt=1774577789;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\t to:to:cc:cc:mime-version:mime-version:\n\t content-transfer-encoding:content-transfer-encoding:\n\t in-reply-to:in-reply-to:references:references;\n\tbh=6/HdPBhl1cpZOUmiZuBTWaeHIDSWjs3qo4yxLZnBGpA=;\n\tb=LBA+DGA7C1hpEc4UK/USzbeWl9ofYAB9golUoHkRx3arz+0f+tCFBPShuiq8sFBcmjRcuj\n\tBkqIUVWSZWrzlncJMS6q2HSKiSIKaHundpnJFyYH9WZp0Dq8jBzWfRFloYOIU6zqnN8+4q\n\thwvlj8SU2eHG55dpFcr7cLa/cO3P9xE=", "From": "Usama Arif <usama.arif@linux.dev>", "To": "Andrew Morton <akpm@linux-foundation.org>,\n\tdavid@kernel.org,\n\tLorenzo Stoakes <ljs@kernel.org>,\n\twilly@infradead.org,\n\tlinux-mm@kvack.org", "Cc": "fvdl@google.com,\n\thannes@cmpxchg.org,\n\triel@surriel.com,\n\tshakeel.butt@linux.dev,\n\tkas@kernel.org,\n\tbaohua@kernel.org,\n\tdev.jain@arm.com,\n\tbaolin.wang@linux.alibaba.com,\n\tnpache@redhat.com,\n\tLiam.Howlett@oracle.com,\n\tryan.roberts@arm.com,\n\tVlastimil Babka <vbabka@kernel.org>,\n\tlance.yang@linux.dev,\n\tlinux-kernel@vger.kernel.org,\n\tkernel-team@meta.com,\n\tmaddy@linux.ibm.com,\n\tmpe@ellerman.id.au,\n\tlinuxppc-dev@lists.ozlabs.org,\n\thca@linux.ibm.com,\n\tgor@linux.ibm.com,\n\tagordeev@linux.ibm.com,\n\tborntraeger@linux.ibm.com,\n\tsvens@linux.ibm.com,\n\tlinux-s390@vger.kernel.org,\n\tUsama Arif <usama.arif@linux.dev>", "Subject": "[v3 24/24] selftests/mm: add madv_dontneed_partial test", "Date": "Thu, 26 Mar 2026 19:09:06 -0700", "Message-ID": "<20260327021403.214713-25-usama.arif@linux.dev>", "In-Reply-To": "<20260327021403.214713-1-usama.arif@linux.dev>", "References": "<20260327021403.214713-1-usama.arif@linux.dev>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Migadu-Flow": "FLOW_OUT", "X-Spam-Status": "No, score=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_PASS,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Add test for partial MADV_DONTNEED on THP. This verifies that\nMADV_DONTNEED correctly triggers a PMD split, discards only the\nrequested page (which becomes zero-filled), and preserves data\nin the surrounding pages.\n\nSigned-off-by: Usama Arif <usama.arif@linux.dev>\n---\n .../testing/selftests/mm/thp_pmd_split_test.c | 34 +++++++++++++++++++\n 1 file changed, 34 insertions(+)", "diff": "diff --git a/tools/testing/selftests/mm/thp_pmd_split_test.c b/tools/testing/selftests/mm/thp_pmd_split_test.c\nindex 1f29296759a5b..060ca1e341b75 100644\n--- a/tools/testing/selftests/mm/thp_pmd_split_test.c\n+++ b/tools/testing/selftests/mm/thp_pmd_split_test.c\n@@ -253,4 +253,38 @@ TEST_F(thp_pmd_split, partial_mremap)\n \t\tself->split_pmd_failed_before);\n }\n \n+/*\n+ * MADV_DONTNEED on THP\n+ *\n+ * Tests that MADV_DONTNEED on a partial THP correctly handles\n+ * the PMD split and discards only the requested pages.\n+ */\n+TEST_F(thp_pmd_split, partial_madv_dontneed)\n+{\n+\tvolatile unsigned char *ptr = (volatile unsigned char *)self->aligned;\n+\tint ret;\n+\n+\tret = allocate_thp(self->aligned, self->pmdsize);\n+\tif (ret)\n+\t\tSKIP(return, \"Failed to allocate THP\");\n+\n+\t/* Write pattern */\n+\tmemset(self->aligned, 0xDD, self->pmdsize);\n+\n+\t/* Partial MADV_DONTNEED - discard middle page */\n+\tret = madvise((char *)self->aligned + self->pagesize, self->pagesize, MADV_DONTNEED);\n+\tASSERT_EQ(ret, 0);\n+\n+\t/* Verify non-discarded pages still have data */\n+\tASSERT_EQ(ptr[0], (unsigned char)0xDD);\n+\tASSERT_EQ(ptr[2 * self->pagesize], (unsigned char)0xDD);\n+\tASSERT_EQ(ptr[self->pmdsize - 1], (unsigned char)0xDD);\n+\n+\t/* Discarded page should be zero */\n+\tASSERT_EQ(ptr[self->pagesize], (unsigned char)0x00);\n+\n+\tlog_and_check_pmd_split(_metadata, self->split_pmd_before,\n+\t\tself->split_pmd_failed_before);\n+}\n+\n TEST_HARNESS_MAIN\n", "prefixes": [ "v3", "24/24" ] }