From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CE41C8302D for ; Mon, 30 Jun 2025 10:25:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1DA0A6B0092; Mon, 30 Jun 2025 06:25:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 18A336B009E; Mon, 30 Jun 2025 06:25:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0527A6B00AA; Mon, 30 Jun 2025 06:25:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id E2F356B009E for ; Mon, 30 Jun 2025 06:25:20 -0400 (EDT) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id A3F3E8046E for ; Mon, 30 Jun 2025 10:25:20 +0000 (UTC) X-FDA: 83611684800.01.0AAFA6C Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) by imf25.hostedemail.com (Postfix) with ESMTP id C8238A0003 for ; Mon, 30 Jun 2025 10:25:18 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=collabora.com header.s=zohomail header.b=DfI8HVR7; dmarc=pass (policy=none) header.from=collabora.com; arc=pass ("zohomail.com:s=zohoarc:i=1"); spf=pass (imf25.hostedemail.com: domain of usama.anjum@collabora.com designates 136.143.188.112 as permitted sender) smtp.mailfrom=usama.anjum@collabora.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1751279119; a=rsa-sha256; cv=pass; b=2NNDbOt/rgkms2qra6C5lBKDZC1h1LL307u1JGP14PbWXr/3aIAmAvJac9wobGFZdfe/eU yNPStHkuAwtVMwkJvviv6IPsolCdEKKJLcEi/UmhtTEiXZhE1iEQIsg/CEURG5hiwsE1w9 8Izwaroka19QX/DtgjlThZTXv1ct31A= ARC-Authentication-Results: i=2; imf25.hostedemail.com; dkim=pass header.d=collabora.com header.s=zohomail header.b=DfI8HVR7; dmarc=pass (policy=none) header.from=collabora.com; arc=pass ("zohomail.com:s=zohoarc:i=1"); spf=pass (imf25.hostedemail.com: domain of usama.anjum@collabora.com designates 136.143.188.112 as permitted sender) smtp.mailfrom=usama.anjum@collabora.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1751279119; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=cpPJV8/hADr82PgAqaYBF0nyZvBsZKRCuN6YMIHqdcE=; b=G1zMVGDCsTn6f0d/6z2OlPC2nNqGYkk/UV1h+exYK1Rcc1OEo4582g8J+G9BEQhPKDPVED wjkntezj2Uy0fPrzrO4pnU8QiR1Sv0qn/loLADyV1Wtlu7lhOZKtvzDaw5yR5uv9GoOXcu wkWvzBiGmciNtaCl5UGRFCXSuBeT2NY= ARC-Seal: i=1; a=rsa-sha256; t=1751279104; cv=none; d=zohomail.com; s=zohoarc; b=G0beHDLVv+/Ffycsq5m2pVM4PZKgW0NbssB+zOfPFZL2AD8qIx5IpXwZIrmrenobNvk+4mSkF6xEWVuZkaX8EKpJ1TH4cuwvOJ++9bQaYoCOrz/W6lleoBD4KKJnEcYH6cKHnVpbxPklsis5KF+W0Ujsw+wimjTdPx3Y00Euhxo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1751279104; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=cpPJV8/hADr82PgAqaYBF0nyZvBsZKRCuN6YMIHqdcE=; b=AZmT/28hE5MjevYWpzItdm9xJu3ytA3v+c6BBSQy/CAv3u/9ZXzDBbwMWXSamhXpBwnAhfGSYbihFIrgXYC89/tBZtDsZziV9EARk+DyWMwHXJp3a4j7GvD/MIylQuYHH2srgw+XhFN3th7aJ3HYPMdmDHB0m5lcI/L6549egrs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=usama.anjum@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1751279104; s=zohomail; d=collabora.com; i=usama.anjum@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=cpPJV8/hADr82PgAqaYBF0nyZvBsZKRCuN6YMIHqdcE=; b=DfI8HVR7ASoe0e4njpTNc3CHsUcpAB4jvqBmmzCyKFdsTAr8W+TbFy9BDWnTnDY8 k5CPq340DAKKjDEeDI7AU0e4LL8meXj+9JzTAZsJv+zm5tfnNx0xaWLa0gYLslJBgD0 1WbS1MXVuxE1Yd6y5IZB50gyef/dSK1Bajs1fGS4= Received: by mx.zohomail.com with SMTPS id 1751279102242736.6456034251825; Mon, 30 Jun 2025 03:25:02 -0700 (PDT) From: Muhammad Usama Anjum To: Andrew Morton , Shuah Khan Cc: Muhammad Usama Anjum , kernel@collabora.com, David Hildenbrand , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] selftests/mm: pagemap_scan ioctl: add PFN ZERO test cases Date: Mon, 30 Jun 2025 15:24:42 +0500 Message-ID: <20250630102443.137809-1-usama.anjum@collabora.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-ZohoMailClient: External X-Stat-Signature: ypcf83bhszrk7y8rqb845fz7xuutbax3 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: C8238A0003 X-Rspam-User: X-HE-Tag: 1751279118-33068 X-HE-Meta: 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 O+132tD8 DTzxQIfQnMmRyKdxCO980yxth2ayhNoelxw3mC9/js9zjqtJriqyAisw+tO+8/ApGjF0vUNwAojotCWC7hjl5/VQBlRy3yXmxHZEF5PFTrnN4sIUXvC+QmroIwxO+zfmfbVBY5ImVa9lJ6abvDTLhfCiLNcyso51u6GRpge2Ct/lEBj3D95+F45D0VgEWlJRjiwTRXOliRpI0YN3Ul11EqdV6hAhpk52ppSedjZ/uKR1BswlnLIuLZ98L3Sbpd82Ro3rFPxl5FiPyIor8oGdjEfmYdYnYmCDorxXioSHkppJ7D2NIqe6GW2gOCVlJMuWqg+xd7g1Syd4TZ6H/sUiCA+cPreF5zfJ82EToeKKwqEvwP+FGcy3nZ0foTKpJgHmNJhED9fbzjmp0SEsusBvY+vpJrd3UGtloSLU2S5vszQmMY4CVJFUMjWOh2z7uMrX29QbHbzecPD/v9ZKO89Tv88mlFfklkAZip31Q+1lg54Pr3zE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add test cases to test the correctness of PFN ZERO flag of pagemap_scan ioctl. Test with normal pages backed memory and huge pages backed memory. Cc: David Hildenbrand Signed-off-by: Muhammad Usama Anjum --- The bug has been fixed [1]. [1] https://lore.kernel.org/all/20250617143532.2375383-1-david@redhat.com --- tools/testing/selftests/mm/pagemap_ioctl.c | 57 +++++++++++++++++++++- 1 file changed, 56 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c index 57b4bba2b45f3..6138de0087edf 100644 --- a/tools/testing/selftests/mm/pagemap_ioctl.c +++ b/tools/testing/selftests/mm/pagemap_ioctl.c @@ -1,4 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 + #define _GNU_SOURCE #include #include @@ -1480,6 +1481,57 @@ static void transact_test(int page_size) extra_thread_faults); } +void zeropfn_tests(void) +{ + unsigned long long mem_size; + struct page_region vec; + int i, ret; + char *mem; + + /* Test with page backed memory */ + mem_size = 10 * page_size; + mem = mmap(NULL, mem_size, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0); + if (mem == MAP_FAILED) + ksft_exit_fail_msg("error nomem\n"); + + /* Touch each page to ensure it's mapped */ + for (i = 0; i < mem_size; i += page_size) + (void)((volatile char *)mem)[i]; + + ret = pagemap_ioctl(mem, mem_size, &vec, 1, 0, + (mem_size / page_size), PAGE_IS_PFNZERO, 0, 0, PAGE_IS_PFNZERO); + if (ret < 0) + ksft_exit_fail_msg("error %d %d %s\n", ret, errno, strerror(errno)); + + ksft_test_result(ret == 1 && LEN(vec) == (mem_size / page_size), + "%s all pages must have PFNZERO set\n", __func__); + + munmap(mem, mem_size); + + /* Test with huge page */ + mem_size = 10 * hpage_size; + mem = memalign(hpage_size, mem_size); + if (!mem) + ksft_exit_fail_msg("error nomem\n"); + + ret = madvise(mem, mem_size, MADV_HUGEPAGE); + if (ret) + ksft_exit_fail_msg("madvise failed %d %s\n", errno, strerror(errno)); + + for (i = 0; i < mem_size; i += hpage_size) + (void)((volatile char *)mem)[i]; + + ret = pagemap_ioctl(mem, mem_size, &vec, 1, 0, + (mem_size / page_size), PAGE_IS_PFNZERO, 0, 0, PAGE_IS_PFNZERO); + if (ret < 0) + ksft_exit_fail_msg("error %d %d %s\n", ret, errno, strerror(errno)); + + ksft_test_result(ret == 1 && LEN(vec) == (mem_size / page_size), + "%s all huge pages must have PFNZERO set\n", __func__); + + free(mem); +} + int main(int __attribute__((unused)) argc, char *argv[]) { int shmid, buf_size, fd, i, ret; @@ -1494,7 +1546,7 @@ int main(int __attribute__((unused)) argc, char *argv[]) if (init_uffd()) ksft_exit_pass(); - ksft_set_plan(115); + ksft_set_plan(117); page_size = getpagesize(); hpage_size = read_pmd_pagesize(); @@ -1669,6 +1721,9 @@ int main(int __attribute__((unused)) argc, char *argv[]) /* 16. Userfaultfd tests */ userfaultfd_tests(); + /* 17. ZEROPFN tests */ + zeropfn_tests(); + close(pagemap_fd); ksft_exit_pass(); } -- 2.43.0